AAT2610IIC-T1 - AnalogicTech

AAT2610

7-Channel PMU for Digital Still Cameras

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General Description

The AAT2610 is a highly integrated power management

solution specifically suited for Digital Still Camera (DSC)

systems, featuring seven DC-DC switching regulators for

maximum operating efficiency.

The input operating voltage range is 1.6 to 5.5V, making

the device an ideal solution for 1-cell Li-ion batteries,

2-cell alkaline batteries, and USB and regulated AC-DC

wall adapters. All seven DC-DC switching regulators fea-

ture high efficiency light load operating mode to extend

battery life while in low power standby state.

Three different DC-DC building blocks provide maximum

design flexibility: a boost (step-up) DC-DC controller

with an output voltage range of 3.0V to 5.5V and a cur-

rent mode control buck (step-down) or boost (step-up)

DC-DC controller with an output voltage range of 2.5V to

the step-up converter (SU) output voltage and buck out-

put range of 0.6V to VIN. Dual current mode control syn-

chronous buck regulators provide low voltage, low noise

outputs required for system logic and memory. Output

voltage range is 0.6V to VIN. The Auxiliary 1 boost (step-

up) is ideally suited for LCD backlight and can drive 1-6

white LEDs up to a maximum of 30mA with ±10% accu-

racy. PWM input controls LED dimming across the fre-

quency range from 10% to 100% duty cycle. The inte-

grated OVP and SCF feature protects the device from

open-circuit LED conditions.

The Auxiliary 2 boost (step-up) and Auxiliary 3 buck-

boost (inverting) output provide low noise (≤30mVpp)

+15V and -7.5V outputs for CCD loads. An expensive

transformer is not required.

No external MOSFETs and low profile TQFN55-40L pack-

age are ideal to save space for DSC solution. Integrated,

low RDS(ON) power MOSFETs provide output voltages from

0.6V to 16VDC and an inverting output up to -10V. The

high switching frequency ensures small external filtering

components. Internal compensation is provided for opti-

mum transient performance and minimum application

design effort.

Features

• Input Voltage Range 1.6 to 5.5V

▪ 1-Cell Li-ion, 2-Cell Alkaline

▪ Adapter or USB Inputs

• 7 Channel up to 96% High Efficiency DC/DCs

▪ Adjustable Output

▪ 4 Channel Synchronous Rectification

▪ Light Load Mode for High Efficiency

• <1µA Total Quiescient Current

• Current Mode Control

▪ Fast, Stable Transient Response

▪ No External Compensation

▪ Current Limit for Internal MOSFET Protection

• High Frequency 1.5MHz System Clock

• High Voltage Series LED Driver

▪ 1 to 6 White LEDs

▪ Up to Maximum 30mA LED Current

▪ External Schottky Diode

▪ ±10% Accuracy Current Sink

▪ Integrated OVP

▪ PWM Dimming: 1k to 30kHz, 10 to 100% Duty

Cycle

• Step-Up and Inverting Outputs for CCD

▪ Low Noise Outputs

▪ Transformerless Inverter Output

• Flexible Sequencing Implementation

▪ Independent Enable Control

▪ 10ms Pre-Programmed Buck or Boost Delay

• Integrated Soft-Start

• Over-Voltage and Over-Temperature Protection

• Pb-free TQFN55-40L Package

• Temperature Range: -40°C to +85°C

Applications

• DSCs and DVCs

• MP3 Players

• PMP

AAT2610

7-Channel PMU for Digital Still Cameras

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AAT2610

7-Channel PMU for Digital Still Cameras

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Typical Applications

Step-

Up/

Bypass

Control

VSD1

2.5V, 200mA

VSD2

1.8V, 200mA

Step-

Down

Control

Step-

Down

Control

I/O, Control

Osc

(1.5MHz)

FBSD2

LXSD2

PVSD2

FBSD1

LXSD1

PVSD1

/SEQ

LXM

PVM

LXSU

VIN

2.2µH

1.8µH

2.5µH

VSU

4.7µF

0603

59.0kΩ

118kΩ

4.7µF

0603

187kΩ

59.0kΩ

FBM

22µF

0805

FBSU

+VBATT

1 Li-ion

Cell

(3.3V-4. 2V)

+VBATT

3.3V, 150mA

3.3µH4. 7µF

0603

267kΩ

59.0kΩ

SUSD

ENMEN

SD1

SD2

SCF

VSU

5V, 920mA

Step-

Up/

Down

Control

VSU

VAUX_L3

-7.5 V, 20mA

PVL3

FBL3

4.7µH

VREF3

4.7µF/10V

0603

59.0kΩ

732k Ω

Step-Up

Control

LXL3

4.7µH

LXL2

FBL2

VAUX_L2

15V, 20mA

59.0kΩ

1.42MΩ

+VBATT

Step-Up

Control

4.7µH

LXL1

CSL1

OVL1

VAUX_L1

16V, 30mA

59.0kΩ

1.54MΩ

Step-Up

Control

Current

Sink

2-4WLED

ENL2 ENL3

ENL1

(Dimming)

4.7µF/25V

0805

432kΩ

59.0kΩ

PVSU

1µF

0603

PVL

SD1

SD2

LGND

4.7µF

1µF

1µ F/25V

0603

+VBATT

1. Single Cell Li-ion Battery Input, 5V Motor.

AAT2610

7-Channel PMU for Digital Still Cameras

PRODUCT DATASHEET Gill Sans MT Bold Italic

15/18, convert to outlines

AAT2610

7-Channel PMU for Digital Still Cameras

PRODUCT DATASHEET Gill Sans MT Bold Italic

15/18, convert to outlines

AAT2610

7-Channel PMU for Digital Still Cameras

PRODUCT DATASHEET Gill Sans MT Bold Italic

15/18, convert to outlines

2610.2009.03.1.4 3

www.analogictech.com

AAT2610

7-Channel PMU for Digital Still Cameras

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15/18, convert to outlines

2610.2009.03.1.4 3

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Step-

Up/

Bypass

Control

VSD1

2.5V, 200mA

VSD2

1.8V, 200mA

Step-

Down

Control

Step-

Down

Control

I/O, Control

Osc

(1.5MHz)

FBSD2

LXSD2

PVSD2

FBSD1

LXSD1

PVSD1

/SEQ

LXM

PVM

LXSU

VIN

2.2µH

1. 8µH

2.5µH

4.7µF

0603

59.0kΩ

118kΩ

4.7µF

0603

187kΩ

59.0kΩ

FBM

22µF

0805

FBSU

+VBATT

VMAIN

3.3V, 150mA

2.2µH

22µF

0805

267kΩ

59.0kΩ

SUSD

SCF

VSU

5V, 800mA

Step-

Up/

Down

Control

VAUX_L3

-7.5V, 20mA

PVL3

FBL3

4.7µ H

VREF3

4.7µF/10V

0603

59.0kΩ

732kΩ

Step-Up

Control

LXL3

4.7µH

LXL2

FBL2

VAUX_L2

15V, 20mA

59.0kΩ

1.42MΩ

+VBATT

Step-Up

Control

4.7µH

LXL1

CSL1

OVL1

VAUX_L1

16V, 30mA

59.0kΩ

1.54MΩ

Step-Up

Control

Current

Sink

2-4WLED

ENL3ENL2

ENL1

(Dimming)

ENSD2ENSD1ENSU ENM

PGSU

4. 7µF/25V

0805

432kΩ

59.0kΩ

PVSU

1µF

0603

PVL

PGMPGSD2PGSD1 PGLGND

4.7µF

1µF

2 Alk

Cell

(1.6-3.3V)

2.2µF

0402

+VBATT

VSU

2. Dual Cell Alkaline Battery Input, 5V Motor.

AAT2610

7-Channel PMU for Digital Still Cameras

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15/18, convert to outlines

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AAT2610

7-Channel PMU for Digital Still Cameras

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Pin Descriptions

Number Symbol Description

1 FBL2

Auxiliary 2 (AUX_L2) boost converter feedback pin. This pin is high impedance when the AUX2 controller

is disabled. Connect an external resistor divider between this pin and AUX2 output and GND to set the

AUX2 output voltage with 0.6V.

2 FBSD1

Step-down 1 (SD1) buck converter feedback pin. This pin is high impedance when the SD1 controller is

disabled. Connect an external resistor divider between this pin and SD1 output and GND to set the SD1

output voltage with 0.6V.

3 PVSD1 Step-down 1 (SD1) buck converter input pin. Bypass to GND plane with a 1µF ceramic capacitor.

4 LXSD1 Step-down 1 (SD1) buck converter switching node. Connect this pin to an external inductor. This pin is

high impedance when the SD1 converter is disabled.

5 PGSD1 Step-down 1 (SD1) buck converter power ground. Tie this pin to ground plane.

6 PGM Main (SUD) converter power ground. Tie this pin to ground plane.

7 LXM

If is SUSD pulled high, the Main is a boost (step-up) converter and the pin functions as the Main converter

switching node. In this case, connect this pin to the external inductor.

If SUSD is pulled low, the Main is a buck (step-down) converter and the pin functions as the Main converter

switching node. In this case, connect this pin to the external inductor.

In either case, LXM is high impedance when the Main converter is disabled.

8 PVM

If SUSD is pulled high, the Main is a boost (step-up) converter and this pin functions as the Main converter

output. In this case, connect a ceramic capacitor to GND plane from this pin.

If SUSD is pulled low, the Main is a buck (step-down) converter and this pin functions as the Main converter

input voltage. In this case, connect this pin to the external inductor.

9 FBM

Main (M) buck or boost converter feedback pin. This pin is high impedance when the Main controller is

disabled. Connect an external resistor divider between this pin and Main output and GND to set the Main

output voltage with 0.6V.

10 SEQ

Main (M) converter open-drain output sequencing pin. This pin is internally pulled low after both SD1 and

SD2 converters completed soft-start and achieved output regulation. This pin can provide gate drive to

external P-channel MOSFETs which disconnect the load during start-up. This pin is open-circuit during

shut-down, overload or during OT trip conditions.

11 SUSD

Main converter conguration pin. Tie this pin to high to congure the Main output as a boost (step-up)

converter, or tie this pin to low to congure the Main output as a buck (step-down) converter. This pin

cannot be toggled during operation.

12 ENL3

Auxiliary 3 (AUX_L3) buck-boost (inverting) converter active high enable pin. The AUX_L3 output remains

disabled until 2,048 clock cycles after Step-Up (SU) output has reached regulation. The pin has an inter-

nal 330kΩ pull-down resistor.

13 ENL2

Auxiliary 2 (AUX_L2) boost converter active high enable pin. The AUX_L2 output remains disabled until

2,048 clock cycles after Step-Up (SU) output has reached regulation. The pin has an internal 330kΩ pull-

down resistor.

14 ENL1

Auxiliary 1 (AUX_L1) boost converter active high enable pin. The Main output remains disabled until 2,048

clock cycles after Step-Up (SU) output has reached regulation. The pin has an internal 330kΩ pull-down

resistor. This pin also functions as PWM input for the LED dimming feature. The input PWM frequency is

logic level high and low within 1kHz to 30kHz frequency. PWM dimming input duty cycle (ON-time/TOTAL-

time) range is from 10% to 100%.

15 VIN Input voltage. Tie this pin to the input of step-up (SU).

16 GND Chip ground. Tie this pin to ground plane.

17 PV Power input for the PMIC. Connect this pin directly to the PVSU pin.

18 ENSD2

Step-down 2 (SD2) buck converter active high enable pin. The SD2 output remains disabled until 2,048

clock cycles after Step-Up (SU) output has reached regulation. This pin has an internal 330kΩ pull-down

resistor.

19 ENSD1

Step-down 1 (SD1) buck converter active high enable pin. The SD1 output remains disabled until 2,048

clock cycles after Step-Up (SU) output has reached regulation. This pin has an internal 330kΩ pull-down

resistor.

20 ENM

Main buck or boost converter active high enable pin. However, the Main output remains disabled until

2,048 clock cycles after Step-Up (SU) output has reached regulation. This pin has an internal 330kΩ pull-

down resistor.

21 ENSU Step-up (SU) boost converter active high enable pin. This pin has an internal 330kΩ pull-down resistor.

AAT2610

7-Channel PMU for Digital Still Cameras

PRODUCT DATASHEET Gill Sans MT Bold Italic

15/18, convert to outlines

AAT2610

7-Channel PMU for Digital Still Cameras

PRODUCT DATASHEET Gill Sans MT Bold Italic

15/18, convert to outlines

AAT2610

7-Channel PMU for Digital Still Cameras

PRODUCT DATASHEET Gill Sans MT Bold Italic

15/18, convert to outlines

2610.2009.03.1.4 5

www.analogictech.com

AAT2610

7-Channel PMU for Digital Still Cameras

PRODUCT DATASHEET Gill Sans MT Bold Italic

15/18, convert to outlines

2610.2009.03.1.4 5

www.analogictech.com

Pin Descriptions

Number Symbol Description

22 SCF

Open drain, active low, short circuit ag output. SCF goes open when overload protection or AUX_L1 open

circuit occur during abnormal operation or during startup. SCF can drive P-channel MOSFETs to disconnect

a given output from the load.

23 FBSU

Step-up (SU) boost converter feedback pin. This pin is high impedance when the SU controller is disabled.

Connect an external resistor divider between this pin and SU output and GND to set the SU output voltage

with 0.6V.

24 PVSU Step-up (SU) boost converter input.

25 LXSU Step-up (SU) boost converter switching node. Connect this pin to the external inductor and anode of the

Schottky rectifying diode. This pin is high impedance when the SU converter is disabled.

26 PGSU Step-up (SU) boost converter power ground. Tie this pin to ground plane.

27 PGSD2 Step-down 2 (SD2) buck converter power ground pin. Tie this pin to ground plane.

28 LXSD2 Step-down 2 (SD2) buck converter switching node. Connect this pin to an external inductor. This pin is

high impedance when the SD2 converter is disabled.

29 PVSD2 Step-down 2 (SD2) buck converter input pin. Bypass this pin to GND plane with a 1µF ceramic capacitor.

30 FBSD2

Step-down 2 (SD2) buck converter feedback pin. This pin is high impedance when the SD2 controller is

disabled. Connect an external resistor divider between this pin and SD2 output and GND to set the SD2

output voltage with 0.6V.

31 VREF3 Auxiliary 3 (AUX_L3) buck/boost (inverting) reference voltage pin. Bypass VREF3 to GND with a 1µF or

greater capacitor. Connect an external resistor divider between this pin and L3 output and FBL with 0.6V.

32 FBL3

Auxiliary 3 (AUX_L3) boost converter feedback pin. The pin is high impedance when the AUX_L3 control-

ler is disabled. Connect an external resistor divider between this pin and AUX_L3 output and VREF3 pin to

set the AUX_L3 negative buck/boost (inverting) output voltage with 0V.

33 PVL3 Auxiliary 3 (AUX_L3) buck/boost (inverting) input node. Connect this pin to the input ceramic capacitor.

34 LXL3 Auxiliary 3 (AUX_L3) buck/boost (inverting) switching node. Connect this pin to the cathode of the exter-

nal Schottky diode and buck/boost inductor.

35 PVL Power input for auxiliary (AUX_L1, AUX_L2, AUX_L3) channels’ power FET driver. Tie this pin to PVSU.

36 LXL2 Auxiliary 2 (AUX_L2) boost (step-up) switching node. Connect this pin to the anode of the external

Schottky diode and boost inductor.

37 PGL Power ground for auxiliary (AUX_L1, AUX_L2, AUX_L3) channels’ power FET driver. Tie this pin to ground

plane.

38 LXL1 Auxiliary 1 (AUX_L1) boost (step-up) switching node. Connect this pin to the anode of the external

Schottky diode and boost inductor.

39 CSL1

Auxiliary 1 (AUX_L1) boost converter current sink pin. The pin is high impedance when the AUX_L1 con-

troller is disabled. Connect this pin to the cathode of the bottom LED in the string to ensure DC current

ow. Current level is programmed by the internal RSET resistor from 1mA to 30mA.

40 OVL1 Auxiliary 1 (AUX_L1) boost (step-up) over-voltage protection pin. Connect an external resistor divider be-

tween this pin and AUX_L1 output voltage and GND to set the AUX_L1 over-voltage threshold with 0.6V.

EP Exposed pad (bottom). Connect to ground directly beneath the package for thermal dissipation.

AAT2610

7-Channel PMU for Digital Still Cameras

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15/18, convert to outlines

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AAT2610

7-Channel PMU for Digital Still Cameras

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15/18, convert to outlines

6 2610.2009.03.1.4

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Pin Configuration

FBL2

FBSD1

PVSD1

LXSD1

PGSD1

PGM

LXM

PVM

FBM

SEQ

FBSD2

PVSD2

LXSD2

PGSD2

PGSU

LXSU

24 PVSU

FBSU

SCF

21 ENSU

ENM

ENSD1

ENSD2

GND

VIN

14 ENL1

ENL2

ENL3

11 SUSD

VREF3

FBL3

PVL3

LXL3

PVL

LXL2

PGL

LXL1

CSL1

OVL1

Absolute Maximum Ratings1

Symbol Description Value Units

All other pins to GND/PGND -0.3 to 6.0 V

Voltage from LXL1, LXL2 to GND/PGND -0.3 to 30.0 V

Voltage from LXL3 to GND/PGND -8.0 to 6.0 V

Operating Junction Temperature Range -40 to 150 °C

Maximum Soldering Temperature (at leads, 10 sec) 300 °C

Thermal Information2

Symbol Description Value Units

PDMaximum Power Dissipation32.0 W

θJA Maximum Thermal Resistance 25.0 °C/W

1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions

specified is not implied. Only one Absolute Maximum Rating should be applied at any one time.

2. Mounted on 1.6mm thick FR4 circuit board.

3. Derate 40mW/°C above 2°C ambient temperature

AAT2610

7-Channel PMU for Digital Still Cameras

PRODUCT DATASHEET Gill Sans MT Bold Italic

15/18, convert to outlines

AAT2610

7-Channel PMU for Digital Still Cameras

PRODUCT DATASHEET Gill Sans MT Bold Italic

15/18, convert to outlines

AAT2610

7-Channel PMU for Digital Still Cameras

PRODUCT DATASHEET Gill Sans MT Bold Italic

15/18, convert to outlines

2610.2009.03.1.4 7

www.analogictech.com

AAT2610

7-Channel PMU for Digital Still Cameras

PRODUCT DATASHEET Gill Sans MT Bold Italic

15/18, convert to outlines

2610.2009.03.1.4 7

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Electrical Characteristics1

Unless otherwise noted VPVSU = VPVM= VPVSD1 = VPVSD2 = 3.6V, TA =-40°C to +85°C.

Symbol Description Conditions Min Typ Max Units

General

VIN Operating Input Voltage Range ILOAD ≤ Full Load (see Tables 1 and 2) 1.6 5.5 V

ISHDN Shutdown Supply Current EN_SU = EN_M = EN_SD1 = EN_SD2 = 0V,

EN_DL1 = EN_DL2 = EN_DL3 = 0V 0.01 10 µA

Quiescient Current into PV Pin

with SU Enabled

EN_SU = 3.6V, FBSU = 1.5V (does not include

switching losses) 300 450 µA

Quiescient Current into PV Pin

with SU/SD1/SD2 Enabled

EN_SU = EN_SD1 = EN_SD2 = 3.6V, FBSU =

FBSD1 = FBSD2 = 1.5V, EN_M = EN_DL1 = EN_

DL2 = EN_DL3 = 0V (does not include switching

losses)

600 900 µA

Quiescient Current into PV Pin

with SU/SUD Enabled

EN_SU = EN_M = 3.6V, FBSU = FBSUD = 1.5V,

EN_SD1 = EN_SD2 = EN_DL1 = EN_DL2 = EN_

DL3 = 0 (does not include switching losses)

450 700 µA

Quiescient Current into PV Pin

with

EN_SU = EN_DL1 = 3.6V, FBSU = FBL1 = 1.5V,

EN_M = EN_SD1 = EN_SD2 = EN_DL1 = EN_DL2

= EN_DL3 = 0(does not include switching losses)

400 650 µA

Oscillator

FOSC Oscillator Frequency Range 1.2 1.5 1.8 MHz

SU DC-DC Boost (Step-Up) Converter

VUVLO(SU) SU Under-Voltage Threshold Rising edge 1.6 1.8 2.0 V

VUVLO(SU),HYS

SU Under-Voltage Threshold

Hysteresis Falling edge 400 mV

VOUT(SU) Step-Up Output Voltage Range 3.0 5.5 V

VIN(BP-ENTER) Enter Bypass Mode VIN Rising edge 4.625 4.750 4.900 V

VIN-HYS(BP-EXIT) Exit Bypass Mode - Hysteresis VIN Falling edge 100 112 125 mV

tDELAY

Start-Up Delay of SUSD, SD1,

SD2, AUX_L1, AUX_L2, AUX_

L3 after VSU in Regulation

512 OSC

Cyc

VFBSU FBSU Reference Voltage TA = 25°C 0.585 0.600 0.615 V

IMODE(SU)

SU Light Load Mode Current

Threshold 200 mA

DMAX(SU) Step-Up Maximum Duty Cycle 1.6 ≤ VPVSU ≤ 5.0V, VFBSU = 0.60V 85 95 %

ILEAK(FBSU) FBSU Pin Leakage Current VFBSU = 0.60V -100 0.01 +100 nA

ILEAK(PVSU) PVSU Pin Leakage Current VLXSU = 0V, VPVSU = 5.5V 0.1 5 µA

ILEAK(LXSU) LXSU Pin Leakage Current VLXSU = VOUT(SU) = 5.5V 0.1 5 µA

RDSON

N-Channel 50 mΩ

P-Channel 130 mΩ

ILIMIT N-Channel Current Limit 4.1 5.5 A

IOFF P-Channel Turn-Off Current 20 mA

ISTARTUP Startup Current Limit VPVSU = 1.8V 1300 mA

TOFF(STARTUP) Startup Off-Time VPVSU = 1.8V 700 ns

FOSC(STARTUP) Startup Frequency VPVSU = 1.8V 200 kHz

1. The AAT2610 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-

tion with statistical process controls.

AAT2610

7-Channel PMU for Digital Still Cameras

PRODUCT DATASHEET Gill Sans MT Bold Italic

15/18, convert to outlines

8 2610.2009.03.1.4

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AAT2610

7-Channel PMU for Digital Still Cameras

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15/18, convert to outlines

8 2610.2009.03.1.4

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Electrical Characteristics1

Unless otherwise noted VPVSU=VPVM= VPVSD1= VPVSD2 =3.6V, TA=-40°C to +85°C.

Symbol Description Conditions Min Typ Max Units

Main DC-DC Buck (Step-Down) or Boost (Step-Up) Converter

VOUT(M)

Main Output Step-Up Voltage Range VSUSD = VPVSU 3.0 5.5 V

Main Output Step-Down Voltage Range VSUSD = GND; VPVM must be greater

than VOUT(M)

1.0 VIN V

VFBM FBM Reference Voltage TA = 25°C 0.585 0.60 0.615 V

ILIMIT(M)

Step-Up Mode Current Limit VSUSD = VPVSU 1.5 1.75 A

Step-Down Mode Current Limit VSUSD = GND 0.7 0.85 A

IMODE(M)

Step-Up Light Load Mode Current

Threshold VSUSD = VPVSU 350 mA

Step-Down Light Load Mode Current

Threshold VSUSD = GND 200 mA

DMAX(M)

Step-Up Maximum Duty Cycle 1.6 ≤ VIN ≤ 5.0V, VSUSD = VPVSU 80 95 %

Step-Down Maximum Duty Cycle 1.6 ≤ VIN ≤ 5.0V, VSUSD = GND 100

ILEAK(FBM) FBM Pin Leakage Current VFBSU = 0.6V -100 0.01 +100 nA

ILEAK(LXM) LXM Pin Leakage Current VLXSU = VOUT(M) = 5.5V 0.1 5 µA

RDSON

N-Channel 75 mΩ

P-Channel 120 mΩ

IOFF(M)

Step-Up Mode N-Channel Turn-Off

Current VSUSD = VPVSU 20

Step-Down Mode N-Channel Turn-Off

Current VSUSD = GND 20

tSOFT-START Soft-Start Interval 2,048 OSC Cyc

TSEQ Sequencing Time Delay SD1/SD2 Regulation to VSEQ(L)

Transition 10,000 OSC Cyc

ILEAK(SEQ) SEQ Pin Leakage Current EN_SU = VPVSU, FBSU = 1.5V 0.1 1 µA

VSEQ(L) SEQ Low Output Voltage 0.1mA into SEQ pin 0.01 0.1 V

SD1/2 DC-DC Step-Down (Buck) Converters

VOUT(SD1/SD2)

SD1/SD2 Step-Down Output Voltage

Range 0.60 VIN V

VFB(SD1/SD2) FBSD1, FBSD2 Reference Voltage TA = 25°C 0.585 0.60 0.615 V

ILIMIT(SD1/SD2) P-Channel Current Limit 0.6 0.7 A

IMODE(SD1/SD2) SD1 Light Load Mode Current Threshold 100 mA

DMAX(SD1/SD2) Maximum Duty Cycle 1.6 ≤ VPVSU ≤ 5.0V, VSD1/2 = 0.60V 100 %

ILEAK(FBSD1/SD2) FBSD1, FBSD2 Pin Leakage Current VFBSD1/SD2 = 0.6V -100 0.01 +100 nA

ILEAK(LXSD1/SD2) LXSD1, LXSD2 Pin Leakage Current VLXSD1/SD2 = 0 to 3.6V 0.1 5 µA

RDSON(SD1)

N-Channel 500 mΩ

P-Channel 650 mΩ

RDSON(SD2)

N-Channel 250 mΩ

P-Channel 450 mΩ

IOFF N-Channel Turn-Off Current 20 mA

TSOFTSTART Soft-Start Interval 2,048 OSC Cyc

1. The AAT2610 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-

tion with statistical process controls.

AAT2610

7-Channel PMU for Digital Still Cameras

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AAT2610

7-Channel PMU for Digital Still Cameras

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AAT2610

7-Channel PMU for Digital Still Cameras

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AAT2610

7-Channel PMU for Digital Still Cameras

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Electrical Characteristics1

Unless otherwise noted VPVSU=VPVM= VPVSD1= VPVSD2 =3.6V, TA=-40°C to +85°C.

Symbol Description Conditions Min Typ Max Units

AUX L1/L2 DC-DC Boost (Step-Up) Converters

VOUT(AUX_L1/L2)

AUX_L1/L2 Step-Up Output Voltage

Range25.0 20.0 V

ICSL1 CSL1 Current Sink Accuracy TA = 25°C 27.0 30.0 33.0 mA

VFBL2 FBL2 Reference Voltage TA = 25°C 0.585 0.60 0.615 V

VOVL1 OVL1 Reference Voltage TA = 25°C 0.585 0.60 0.615 V

ILIMIT(AUX_L1) N-Channel Current Limit 0.60 0.70 A

ILIMIT(AUX_L2) N -Channel Current Limit 0.60 0.70 A

IMODE(AUX_L1/L2)

AUX_L1/L2 Light Load Mode Current

Threshold 70 mA

DMAX(L1/L2) Maximum Duty Cycle 95 %

ILEAK(FBL2) FBL2 Pin Leakage Current -100 0.01 +100 nA

RDSON(AUX_L1) N-Channel 1000 mΩ

RDSON(AUX_L2) N-Channel 1000 mΩ

TSOFTSTART(AUX_L2) AUX_L2 Soft-Start Interval 2,048 OSC Cyc

AUX L3 DC-DC Buck/Boost (Inverter) Converters

VREF3 REF3 Reference Voltage TA = 25°C, IREF = 20µA 0.585 0.60 0.615 V

VFBL3 FBL3 Inverter Reference Voltage TA = 25°C -0.01 0.00 0.01 V

ILIMIT(AUX_L3) P-Channel Current Limit 1.5 A

IMODE(AUX_L3) SD1 Light Load Mode Current Threshold 100 mA

ILEAK(REF3,FBL3) REF3, FBL3 Pin Leakage Current -100 0.01 +100 nA

RDSON P-Channel 1000 mΩ

tSOFTSTART Soft-Start Interval 2,048 OSC Cyc

Overload Protection

tDELAY(SCF) Overload Fault Delay 100,000 OSC Cyc

ILEAK(SCF) SCF Pin Leakage Current EN_SU = VPVSU, FBSU = 1.5V 0.1 1 µA

VL(SCF) SCF Low Output Voltage 0.1mA into SCF pin 0.01 0.1 V

Thermal Protection

TSD Over-Temperature Shutdown 140 °C

THYS Over-Temperature Shutdown Hysteresis 15 °C

1. The AAT2610 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-

tion with statistical process controls.

2. The Step-Up converter operates in startup mode until this voltage is reached. Do not apply full load current during startup.

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7-Channel PMU for Digital Still Cameras

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Electrical Characteristics1

Unless otherwise noted VPVSU=VPVM= VPVSD1= VPVSD2 =3.6V, TA=-40°C to +85°C.

Symbol Description Conditions Min Typ Max Units

Logic Inputs

VL(EN_SU) EN_SU Logic Low Threshold

1.1V < VPVSU < 1.8V 0.2 V

1.8V ≤ VPVSU < 2.5V 0.4 V

2.5V ≤ VPVSU < 5.5V 0.5 V

VH(EN_SU) EN_SU Logic High Threshold 1.1V < VPVSU < 1.8V (VPVSU - 0.2) V

1.8V < VPVSU < 5.5V 1.6 V

VEN_x(L), VSUSD(L) EN_x, SUSD Logic Low Threshold 2.7V < VPVSU < 5.5V 0.5 V

VEN_x(H), VSUSD(H) EN_x, SUSD Logic Low Threshold 2.7V < VPVSU < 5.5V 1.6 V

ILEAK(SUSD) SUSD Pin Leakage Current 0.1 1 µA

RENx ENx Input Impedance 330 kΩ

TEN_L1(L) Disable Low Time Dimming state: EN low to LED

Disable; 2.7V < VIN < 5V 2 3 4 µs

TEN_L1(H) Enable High Time Dimming state: EN high to LED

Regulation; 2.7V < VIN <5V 2 3 4 µs

TEN_L1(DIS-L) Disable Low Time

Disables Dimming state: Soft-

start enabled on subsequent EN

transition; 2.7V < VIN < 5V

1000 1200 µs

1. The AAT2610 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-

tion with statistical process controls.

AAT2610

7-Channel PMU for Digital Still Cameras

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AAT2610

7-Channel PMU for Digital Still Cameras

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7-Channel PMU for Digital Still Cameras

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7-Channel PMU for Digital Still Cameras

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Typical Characteristics

SU Efficiency vs. Output Current

(VSU = 5V; L = 2.2µH; COUT = 22µF)

Output Current (mA)

Efficiency (%)

1000100101

100

VBAT = 2.0V

VBAT = 2.4V

VBAT = 2.7V

VBAT = 3.0V

VBAT = 3.3V

VBAT = 3.6V

VBAT = 3.8V

VBAT = 4.2V

VBAT = 5.0V

MSD Efficiency vs. Output Current

(VPVM = VBAT; VMSD= 3.3V; L = 3.3µH; COUT = 4.7µF)

Output Current (mA)

Efficiency (%)

110 100 1000

100

VBAT = 3.3V

VBAT = 3.6V

VBAT = 3.8V

VBAT = 4.2V

VBAT = 5.0V

MSU Efficiency vs. Output Current

(VMSU = 3.3V; L = 2.2µH; COUT = 10µF)

Output Current (mA)

Efficiency (%)

110 100 1000

100

VBAT = 2.0V

VBAT = 2.4V

VBAT = 2.7V

VBAT = 3.0V

SD1 Efficiency vs. Output Current

(VPVSD1 = VBAT; VSD1 = 2.5V; L = 2.2µH; COUT = 10µF)

Output Current (mA)

Efficiency (%)

110 100 1000

100

VBAT = 3.3V

VBAT = 3.6V

VBAT = 3.8V

VBAT = 4.2V

VBAT = 5.0V

SD2 Efficiency vs. Output Current

(VPVSD2 = VBAT; VSD2 = 1.8V; L = 2.2µH; COUT = 4.7µF)

Output Current (mA)

Efficiency (%)

110 100 1000

100

VBAT = 2.0V

VBAT = 2.4V

VBAT = 2.7V

VBAT = 3.0V

VBAT = 3.3V

VBAT = 3.6V

VBAT = 3.8V

VBAT = 4.2V

VBAT = 5.0V

SD2 Efficiency vs. Output Current

(VSD2 = 1.2V; L = 2.2µH; COUT = 4.7µF)

Output Current (mA)

Efficiency (%)

110 100 1000

VBAT = 2.0V

VBAT = 2.4V

VBAT = 2.7V

VBAT = 3.0V

VBAT = 3.3V

VBAT = 3.6V

VBAT = 3.8V

VBAT = 4.2V

VBAT = 5.0V

AAT2610

7-Channel PMU for Digital Still Cameras

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Typical Characteristics

AUX1 Efficiency vs. PWM Duty Cycle

(4 WLEDs; L = 4.7µH; COUT = 1µF; 10kHz PWM Control)

LED Current (mA)

Efficiency (%)

0612 18 24 30

VBAT = 2.0V

VBAT = 2.4V

VBAT = 2.7V

VBAT = 3.0V

VBAT = 3.6V

VBAT = 4.2V

VBAT = 5.0V

AUX2 Efficiency vs. Output Current

(VAUX2 = +15V; L = 4.7µH; COUT = 4.7µF)

Output Current (mA)

Efficiency (%)

110 100

VBAT = 2.0V

VBAT = 2.4V

VBAT = 2.7V

VBAT = 3.0V

VBAT = 3.6V

VBAT = 4.2V

VBAT = 5.0V

AUX3 Efficiency vs. Output Current

(VAUX3 = -7.5V; L = 4.7µH; COUT = 4.7µF)

Load Current (mA)

Efficiency (%)

110 100

VBAT = 2.0V

VBAT = 2.4V

VBAT = 2.7V

VBAT = 3.0V

VBAT = 3.6V

VBAT = 4.2V

VBAT = 5.0V

AUX1 PWM Duty Cycle vs. LED Current

(4 WLEDs; L = 4.7µH; COUT = 1µF; 10kHz PWM Control)

Duty Cycle (%)

LED Current (mA)

020406080 100

VBAT = 2.0V

VBAT = 2.4V

VBAT = 2.7V

VBAT = 3.0V

VBAT = 3.6V

VBAT = 4.2V

VBAT = 5.0V

SU Load Regulation vs. Output Current

(VSU = 5V; L = 2.2µH; COUT = 22µF)

Load Current (mA)

Load Regulation (%)

0200 400 600 800 1000 1200 1400 1600

-0.050

-0.045

-0.040

-0.035

-0.030

-0.025

-0.020

-0.015

-0.010

-0.005

0.000

0.005

0.010

0.015

0.020

Bypass mode

VBAT = 2.0V

VBAT = 2.4V

VBAT = 2.7V

VBAT = 3.0V

VBAT = 3.3V

VBAT = 3.6V

VBAT = 3.8V

VBAT = 4.2V

VBAT = 5.0V

Main SD Load Regulation vs. Output Current

(VPVM = VBAT; VMSD = 3.3V; L = 3.3µH; COUT = 4.7µF)

Load Current (mA)

Load Regulation (%)

050 100 150 200 250 300 350 400

-0.05

-0.04

-0.03

-0.02

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

VBAT = 3.3V

VBAT = 3.6V

VBAT = 3.8V

VBAT = 4.2V

VBAT = 5.0V

Dropout Mode

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7-Channel PMU for Digital Still Cameras

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7-Channel PMU for Digital Still Cameras

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7-Channel PMU for Digital Still Cameras

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7-Channel PMU for Digital Still Cameras

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Typical Characteristics

Main SU Load Regulation vs. Output Current

(VMSU = 3.3V; L = 2.2µH; COUT = 10µF)

Load Current (mA)

Load Regulation (%)

050 100 150 200 250 300 350 400

-0.05

-0.04

-0.03

-0.02

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

VBAT = 2.0V

VBAT = 2.4V

VBAT = 2.7V

VBAT = 3.0V

SD1 Load Regulation vs. Output Current

(VPVSD1 = VBAT; VSD1 = 2.5V: L = 2.2µH; COUT = 10µF)

Load Current (mA)

Load Regulation (%)

050 100 150 200 250 300 350 400

-0.010

-0.008

-0.006

-0.004

-0.002

0.000

0.002

0.004

0.006

0.008

0.010

VBAT = 3.3V

VBAT = 3.6V

VBAT = 3.8V

VBAT = 4.2V

VBAT = 5.0V

SD2 Load Regulation vs. Output Current

(VPVSD2 = VBAT; VSD2 = 1.8V: L = 2.2µH; COUT = 4.7µF)

Load Current (mA)

Load Regulation (%)

050 100 150 200 250 300 350 400

-0.010

-0.008

-0.006

-0.004

-0.002

0.000

0.002

0.004

0.006

0.008

0.010

VBAT = 2.4V

VBAT = 3.0V

VBAT = 3.6V

VBAT = 4.2V

VBAT = 5.0V

SD2 Load Regulation vs. Output Current

(VSD2 = 1.2V: L = 2.2µH; COUT = 4.7µF)

Load Current (mA)

Load Regulation (%)

050 100 150 200 250 300 350 400

-0.010

-0.008

-0.006

-0.004

-0.002

0.000

0.002

0.004

0.006

0.008

0.010

VBAT = 2.4V

VBAT = 3.0V

VBAT = 3.6V

VBAT = 4.2V

VBAT = 5.0V

AUX2 Load Regulation vs. Output Current

(VAUX2 = +15V; L = 4.7µH; COUT = 4.7µF)

Load Current (mA)

Load Regulation (%)

0102030405060708090 100

-0.010

-0.008

-0.006

-0.004

-0.002

0.000

0.002

0.004

0.006

0.008

0.010 VBAT = 2.0V

VBAT = 2.4V

VBAT = 2.7V

VBAT = 3.0V

VBAT = 3.6V

VBAT = 4.2V

VBAT = 5.0V

AUX3 Load Regulation vs. Output Current

(VAUX3 = -7.5V; L = 4.7µH; COUT = 4.7µF)

Load Current (mA)

Load Regulation (%)

010 100

-2.0

-3.0

-1.0

0.0

1.0

2.0

3.0 VBAT = 2.0V

VBAT = 2.4V

VBAT = 2.7V

VBAT = 3.0V

VBAT = 3.6V

VBAT = 4.2V

VBAT = 5.0V

AAT2610

7-Channel PMU for Digital Still Cameras

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Typical Characteristics

SU Output Ripple

(VBAT = 3.6V; VSU = 5V; COUT = 22µF; 10mA Load)

Time (10µs/div)

LXSU

(5V/div)

IINDUCTOR

(500mA/div)

VSU (AC)

(50mV/div)

SU Output Ripple

(VBAT = 3.6V; VSU = 5V; L = 2.2µH;

COUT = 22µF; 200mA Load)

Time (400ns/div)

LXSU

(5V/div)

IINDUCTOR

(200mA/div)

VSU (AC)

(10mV/div)

Main SU Output Ripple

(VBAT = 2.4V; VMSU = 3.3V; L = 2.2µH;

COUT = 10µF; 10mA Load)

Time (4µs/div)

LXM

(2V/div)

IINDUCTOR

(500mA/div)

VMSU (AC)

(20mV/div)

Main SU Output Ripple

(VBAT = 2.4V; VMSU = 3.3V; L = 2.2µH;

COUT = 10µF; 200mA Load)

Time (400ns/div)

LXM

(5V/div)

IINDUCTOR

(200mA/div)

VMSU

(20mV/div)

Main SD Output Ripple

(VPVM = VBAT = 4.2V; VMSD = 3.3V; L = 3.3µH;

COUT = 4.7µF; 10mA Load)

Time (4µs/div)

LXM

(2V/div)

IINDUCTOR

(200mA/div)

VMSD (AC)

(20mV/div)

Main SD Output Ripple

(VPVM = VBAT = 4.2V; VMSD = 3.3V; L = 3.3µH;

COUT = 4.7µF; 200mA Load)

Time (4µs/div)

LXM

(2V/div)

IINDUCTOR

(200mA/div)

VMSD (AC)

(10mV/div)

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7-Channel PMU for Digital Still Cameras

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Typical Characteristics

SD Output Ripple

(VPSD2 = VBAT = 3.6V; VSD2 = 1.8V; L = 2.2µH;

COUT = 4.7µF; 10mA Load)

Time (2µs/div)

(2V/div)

IINDUCTOR

(200mA/div)

VSD2 (AC)

(20mV/div)

SD Output Ripple

(VPVSD2 = VBAT = 3.6V; VSD2 = 1.8V; L = 2.2µH;

COUT = 4.7µF; 200mA Load)

Time (800ns/div)

LXSD2

(2V/div)

IINDUCTOR

(200mA/div)

VSD2 (AC)

(20mV/div)

AUX1 Output Ripple

(VBAT = 3.6V; COUT = 1µF; L = 4.7µH;

4 WLED with 30mA LED Current)

Time (400ns/div)

LXL1

(10V/div)

IINDUCTOR

(200mA/div)

VAUX1 (AC)

(100mV/div)

AUX2 Output Ripple

(VBAT = 3.6V;

VAUX2 = 15V;

COUT = 4.7µF/25V;

L = 4.7µH; 20mA Load)

Time (400ns/div)

LXL2

(10V/div)

IINDUCTOR

(200mA/div)

VAUX2 (AC)

(20mV/div)

AUX3 Output Ripple

(VBAT = 3.6V;

VAUX3 = -7.5V;

COUT = 4.7µF/10V;

L = 4.7µH; 20mA Load)

Time (400ns/div)

LXL3

(10V/div)

IINDUCTOR

(100mA/div)

VAUX3 (AC)

(10mV/div)

SU Channel Load Transient Response

(VBAT = 3.6V; VSU = 5V; L = 2.2µH; COUT = 22µF;

Transient Slew Rate 0.1A/µs)

Time (40µs/div)

IOUT

(200mA/div)

VSU (AC)

(200mV/div)

200mA

500mA

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Typical Characteristics

Main SD Load Transient Response

(VBAT = VPVM = 3.6V; VMSD = 3.3V; L = 3.3µH;

COUT = 4.7µF; Transient Slew Rate = 0.1A/µs)

Time (40µs/div)

IOUT

(100mA/div)

VMSD

(50mV/div)

100mA

200mA

SD1 Load Transient Response

(VBAT = VPVSD1 = 3.6V; VSD1 = 2.5V; L = 2.2µH;

COUT = 10µF; Transient Slew Rate = 0.1A/µs)

Time (40µs/div)

IOUT

(100mA/div)

VMSD

(50mV/div)

100mA

200mA

SD2 Load Transient Response

(VBAT = VPVSD2 = 3.6V; VSD2 = 1.8V; L = 2.2µH;

COUT = 4.7µF; Transient Slew Rate = 0.1A/µs)

Time (40µs/div)

IOUT

(100mA/div)

VSD2

(50mV/div)

100mA

200mA

AUX2 Load Transient Response

(VBAT = 3.6V; VAUX2 = 15V; L = 4.7µH;

COUT = 4.7µF/25V; Transient Slew Rate = 0.1A/µs)

Time (40µs/div)

IOUT

(10mA/div)

VAUX2

(200mV/div)

1mA

20mA

AUX3 Load Transient Response

(VBAT = VPVL3 = 3.6V; VAUX3 = -7.5V; L = 4.7µH;

COUT = 4.7µF/10V; Transient Slew Rate = 0.1A/µs)

Time (40µs/div)

IOUT

(10mA/div)

VAUX3

(200mV/div)

1mA

20mA

Mininum Start-up Voltage vs. Load Current

(VSU = 5V)

Battery Voltage (V)

SU Load Current (mA)

2.42.22.01.83.23.02.82.63.63.4

400

600

800

1000

1200

1400

1600

1800

2000

AAT2610

7-Channel PMU for Digital Still Cameras

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7-Channel PMU for Digital Still Cameras

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7-Channel PMU for Digital Still Cameras

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Typical Characteristics

SU Start-up

(VBAT = 3.6V; VSU = 5V; COUT = 22µF; 1A Load)

Time (200µs/div)

IIN

(2A/div)

(5V/div)

VSU

(5V/div)

LXSU

(5V/div) 0

Line Transient Response

(VBAT = 3.6V to 4.2V; VSU = 5V; L = 2.2µH;

COUT = 22µF; 200mA Load)

Time (1ms/div)

VSU

(100mV/div)

VBAT

(2V/div)

SU Start-up Sequence

(VBAT = 3.6V; All Seven Channels Enabled;

VSU = 5V; SU = 10mA Load)

Time (200µs/div)

IIN

(1A/div)

(5V/div)

VSU

(5V/div)

AUX1, AUX2, AUX3 Start-up Sequence

(VBAT = 3.6V; AUX1 = 4 WLEDs; VSU = 5V; VAUX2 = 15V;

VAUX3 = -7.5V; AUX2, AUX3 = 10mA Load)

Time (400µs/div)

(5V/div)

VAUX1

(5V/div)

VAUX2

(5V/div)

VAUX3

(5V/div)

MSD, SD1, SD2 Startup Sequence

(VBAT = 3.6V; VSU = 5V; VMSD = 3.3V;

VSD2 = 1.8V; 10mA Load)

(5V/div)

VSD1

(2V/div)

VMSD

(2V/div)

VSD2

(2V/div) 0

Time (400µs/div)

MSU, SD1, SD2 Startup Sequence

(VBAT = 1.8V; VSU = 5V; VMSU = 3.3V; VSD1 = 2.5V;

PVSD1 = PVSD2 = PVSU; 10mA Load)

Time (400µs/div)

(2V/div)

VMSU

(2V/div)

VSD1

(2V/div)

VSD2

(2V/div)

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AAT2610

7-Channel PMU for Digital Still Cameras

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Typical Characteristics

Reference Voltage vs. Temperature

Temperature (°C)

Reference Voltage (V)

1.82.2 2.63.0 3.43.8 4.24.6 5.0

0.596

0.597

0.598

0.599

0.600

0.601

0.602

0.603

0.604

-40°C

25°C

85°C

Switching Frequency vs. Temperature

Temperature (°C)

Frequency (MHz)

1.30

1.34

1.38

1.42

1.46

1.50

1.54

1.58

1.62

1.66

1.70

-40020 40 60 80-20

Shutdown Current vs. Input Voltage

Input Voltage (V)

Shutdown Current (uA)

1.82.2 2.63.0 3.43.8 4.24.6 5.0

1.82.6 3.03.4 3.84.2 4.65.0 5.42.2

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

0.20

-40°C

25°C

85°C

Input Current vs. Input Voltage

(Only SU Enabled, VSU = 5V, L = 2.2μH, COUT = 22μF)

Battery Voltage (V)

Input Current (mA)

1.02.0 2.53.0 3.54.0 4.55.0 5.51.5

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

-40°C

25°C

85°C

AAT2610

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AAT2610

7-Channel PMU for Digital Still Cameras

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Functional Block Diagram

Step-

Up/

Bypass

Control

Step-

Down

Control

Step-

Down

Control

I/O, Control

Osc

(1.5MHz)

FBSD2

LXSD2

PVSD2

FBSD1

LXSD1

PVSD1

SEQ

LXM

PVM

LXSU

VIN

FBM

FBSU

SUSD

SCF

Step-

Up/

Down

Control

PVL3

FBL3

VREF3

Step-Up

Control

LXL3

LXL2

FBL2

Step-Up

Control

LXL1

CSL1

OVL1

Step-Up

Control

Current

Sink

PVSU

PVL

PGSU PGMPGSD2PGSD1PGL GND

ENL3ENL2

ENL1

(Dimming)

ENSD2ENSD1ENSU ENM

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Functional Description

The AAT2610 PMIC is targeted for single cell Li-ion bat-

tery or dual cell Alkaline battery applications. It includes

seven integrated step-up and step-down converters,

including one synchronous step-up converter (SU), two

synchronous step-down converters (SD1, SD2), one

synchronous step-up or step-down converter (Main), two

non-synchronous step-up converters (AUX1, AUX2) and

one non-synchronous buck-boost (inverting) converter

(AUX3).

The SU converter is the key channel. Its output powers

all internal control and reference circuits when the out-

put voltage is above 2.7V. The AUX1 converter is spe-

cially designed for 1 to 6 white LED serial backlight

applications. Its current sink pin (CSL1) is suitable to

control WLED current to up to 30mA. AUX3 is a transfor-

merless inverting converter which controls the internal

P-channel MOSFET to regulate negative voltage.

The AAT2610 uses a fixed-frequency peak current control

architecture. Light load mode is used to enhance light

load efficiency. Compensation is integrated to reduce the

number of external components and achieve excellent

transient response and load and line regulation.

The ideal 1.5MHz switching frequency allows the use of

smaller output filter components for improved power

density, reduced external component size, and optimized

output voltage ripple. The output voltages can be pro-

grammed by an external divider.

The AAT2610 has seven separate enable pins to control

each converter's startup. A 1.4ms startup delay is

employed to guarantee that the key SU converter is

already in regulation and the internal control and the

reference have been normally biased before the other six

converters start up.

Synchronous Step-Up DC to DC Converter

The AAT2610 has one synchronous step-up DC-DC con-

verter. It utilizes internal power MOSFETs to achieve high

efficiency over the full load current range. The external

feedback can program the output voltage between 3.0V

to 5.5V. Its “bypass” mode automatically connects the

input to the output when the input voltage is higher than

the bypass mode threshold. In shutdown, the enable pin

(ENSU) is pulled low, the SU converter output is equal to

the input voltage minus a voltage drop across the para-

sitical body diode, and all other channels are shut down

regardless of their enable setting.

Start-Up

The AAT2610's major control circuitries adopt power

from the SU converter output and do not function at less

than 2.7V. To ensure the PMIC can start up at VIN as low

as 1.8V, the step-up converter employs a startup oscilla-

tor with a typical 200kHz frequency. The startup oscilla-

tor drives the internal N-channel MOSFET at LXSU until

the SU converter output voltage reaches 2.7V, at which

point the current-mode PWM circuitry takes over. A

startup current limit (750mA) and NMOSFET off time

(700ns) decrease the startup inrush current. At low input

voltages, the AAT2610 may have difficulty starting up

with heavy loads.

Under-Voltage Lockout

Independent UVLO (Under-Voltage Lockout) circuitry

guarantees the sufficient input power and proper opera-

tion of all internal circuitry. When input voltage at VIN

rises above 1.8V, the AAT2610 leaves UVLO status and

enters the startup process. Once in regulation, the VIN

power can be as low as 1.6V before the AAT2610 enters

UVLO status.

Bypass Mode

When the SU converter input voltage increases above the

bypass mode threshold (typically 4.75V), the step-up

converter enters “bypass” mode, which automatically

connects the input to the output. In this mode, P-channel

synchronous MOSFET is always ON and N-channel

MOSFET is always off. The output voltage follows input

voltage in the mode and overload protection is disabled.

Synchronous Step-Up /

Step-Down DC to DC Converter

The AAT2610 has one synchronous step-up/step-down

DC-DC converter which is ideally designed for 2AA/Li-ion

applications. The SUSD pin is used to set the operation

mode. When SUSD is set to logic high, the step-up con-

verter setting is selected. N-channel switch transistor

current is sensed for current loop control to regulate the

output over the complete load range; when SUSD is

pulled low, the step-down converter type is set and the

P-channel switch transistor current is sampled for the

current control loop. In both converter types, soft-start

is employed to suppress the startup inrush current and

eliminate the output voltage overshoot.

In shutdown with the enable pin (ENM) pulled low, if the

step-down converter is selected, the converter is forced

into a non-switching state and the output voltage drops

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to zero. When the step-up converter is selected, the out-

put voltage is equal to the input voltage minus a voltage

drop across the parasitical body diode. If true load dis-

connection is required, an external PMOSFET controlled

by SEQ can be adopted.

Synchronous Step-Down

DC to DC Converter

The AAT2610 has two synchronous step-down DC-DC

converters. Their output voltages can be programmed

from 0.6V to VIN by an external resistor divider.

At dropout, the converter’s duty cycle equals 100% and

the output voltage tracks the input voltage minus the

voltage drop across the P-channel MOSFET. At low input

supply voltage, the RDS(ON) of the P-channel MOSFET

increases, and the efficiency of the converter decreases.

The two step-down converters adopt soft-start to elimi-

nate output voltage overshoot when the enable or input

voltage is applied. When the ENSD1 and ENSD2 are

pulled low, the outputs of the two SD converters are

down to zero and its shutdown current is below 1µA.

Non-Synchronous Step-Up and Buck/

Boost (Inverting) DC to DC Converters

Two non-synchronous step-up converters are targeted

for LCD backlight and CCD positive loads. The controllers

regulate the output voltage by modulating the pulse

width of the internal NMOSFET. External schottky diode

and power inductor are required to set up the boost. The

output voltage can be programmed from 5V to 20V by

external divider.

Auxiliary 1 is ideally designed for driving typical 4 serial

white LEDs. The maximum current flowing through the

WLED string is sensed at CSL1 and set to 30mA by the

internal ballast resistor with ±10% accuracy. The industry

standard PWM (Pulse Width Modulation) controlling tech-

nology is adopted to program the WLED current. Applying

a 10% ~100% duty cycle PWM signal with the frequency

range 1kHz to 30kHz at ENL1 can get 2mA to 30mA

WLED current. If an open circuit occurs, the internal

over-voltage protection circuit prevents damage to the

converter within 67ms, then shuts down all channels.

Auxiliary 2 is designed for +15V CCD bias. Soft-start is

adopted to eliminate the output voltage overshoot and

decrease the effect on the input voltage.

Auxiliary 3 is non-synchronous buck-boost (inverting)

DC to DC converter which is targeted for negative CCD

loads with low noise. Soft-start is adopted to limit the

inrush current at startup.

Light Load Mode and

Normal PWM Control

The AAT2610 uses light load mode to enhance the effi-

ciency at light load. In light load mode, if the error

amplifier output signal is lower than a given level at a

certain clock point, the switch pulse is skipped to reduce

dominant switching losses.

In normal PWM mode to the buck converter, the current

through the P-channel (high side) is sensed for current

loop control. The P-channel current limit is used to pre-

vent internal power PMOSFET overstress or damage by

the high power. To the boost converter, the current though

the N-channel (low side) is sensed for the control loop and

its current limit also protects the main MOSFET.

The error amplifier programs the current mode loop for

the necessary peak switch current to force a constant

output voltage for all load and line conditions. The inter-

nal fixed slope compensation is employed to eliminate

the sub-harmonic oscillation and keep regulation stable

when the duty cycle is over 50%.

Fault Protection

Short-Circuit and Overload Protection

When any of the converters’ output voltage is lower than

the programmed value for a certain period of time

(100,000 clock cycles, typically 66.7ms), the central

control circuits treat it as an overload situation; all seven

channels will be turned off and SCF will be pulled low

until the IC is restarted either by SU enable pin (ENSU)

reset or re-application of the input voltage. During over-

load period, the peak current limit prevents the main

switch (NMOSFET of step-up converter and PMOSFET of

step-down converter) from overstress and damage, and

also avoids saturation of the external inductor. For syn-

chronous step-up (SU) channels, overload protection

function is disabled in “bypass” mode.

Over-Temperature Protection

Thermal protection completely disables power MOSFET

switching when internal power dissipation becomes

excessive. Only reference and internal clock are still

active in this condition. Once the over-temperature con-

dition is removed, the output voltages automatically

recover. The junction over-temperature threshold is

140°C with 15°C of hysteresis.

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Application Information

Setting the Output Voltage

Step-Down Converter

An external resistor divider is used to program the step-

down converter's output voltage from 0.6V to VIN.

Resistors R1 and R2 in Figure 1 program the output to

regulate at voltages higher than 0.6V. To limit the bias

current required for the external feedback resistor string

while maintaining good noise immunity, the suggested

value for R2 is 59kΩ. Although a larger value will further

reduce quiescent current, it will also increase the imped-

ance of the feedback node, making it more sensitive to

external noise and interference. Table 1 summarizes the

resistor values for various output voltages with R2 set to

59kΩ.

The AAT2610 has 3 step-down converters: SD1, SD2

and Main SD. The external resistor sets the output volt-

age according to the following equations:

VOUT = 0.6V · 1 +

R1 = -1 · R2

VOUT

0.6V

Table 1 shows the resistor selection for different output

voltage settings. 1% accuracy metal-film resistors are

strongly recommended to get accurate output voltages.

VOUT (V)

R2 = 59kΩ

R1 (kΩ)

1.2 59

1.5 88.7

1.8 118

2.5 187

3.0 237

3.3 267

Table 1: Resistor Select for Step-Down Converter

Output Voltage Setting.

Step-Up Converter

Similar to the step-down converter, the step-up regula-

tors also use an external resistor divider to program the

output voltage. The AAT2610 has 4 step-up converters:

SU, Main SU, AUX1 and AUX2. The equation for external

resistors setting the output voltage is same as for the

step-down converter. Figure 2 shows the synchronous

(SU and Main SU) and non-synchronous (AUX1 and

AUX2) step-up converter application connections. Table

2 shows resistor selection for different output voltage

settings. 1% accuracy metal-film resistors are strongly

recommended to get accurate output voltages.

AAT2610

Step-Down Converter

VIN

187kΩ

59kΩ

VOUT

2.5V

Figure 1: Step-Down Converter with Output Voltage Programmed by External Resistor Divider.

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VOUT (V)

R2 = 59kΩ

R1 (kΩ)

3.3 267

3.8 316

4.2 357

5.0 432

15 1420

Table 2: Resistor Select for Step-up Converter

Output Voltage Setting.

Buck-Boost (Inverting) Converter

The AAT2610 has one inverting converter, AUX3. Figure

3 shows an AUX3 application circuit. Its programmed

output voltage can be set by the following equations:

VOUT = · R1

-0.6V

R1 = · R2

VOUT

-0.6V

REF

LXL3

FBL3

AAT2610

Inverting converter

732kΩ

59kΩ

VOUT

-7.5V

PVL3

VIN

Figure 3: Buck/Boost (Inverting) Converter with

Output Voltage Programmed by External Resistor

Divider.

Inductor Selection

The AAT2610 can utilize small surface mount inductors

due to its fast 1.5MHz switching frequency. Optimized

inductor values for each channel keeps the seven chan-

nels stable, and achieves reduced output voltage ripple

at smaller output capacitor size. See Table 3 for recom-

mended inductors for each channel. A greater inductance

value will allow greater output current capability by

reducing inductor ripple current. Increasing the induc-

tance above 4.7µH will increase size to get enough satu-

ration current rating. The following equations show the

minimum saturation current of the selected inductors.

AAT2610

Synchronous Step-Up Converter

432kΩ

59kΩ

OUT

AAT2610

Non-Synchronous

Step-Up Converter

1.43MΩ

59kΩ

OUT

15V

(a) Synchronous step-up converter (b) Non-synchronous step-up converter

Figure 2: Step-Up Converter with Output Voltage Programmed by External Resistor Divider.

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To step-up converter,

IL_SAT >+

IOUT_MAX

1 - D

VIN · D

2 · f · L

Among it,

D = 1 -

VIN

VOUT

To step-down converter,

IL_SAT > IOUT_MAX + (VIN - VOUT) · D

2 · f · L

Among it,

D =

VOUT

VIN

Input and Output Capacitor Selection

Low ESR (equivalent series resistance) capacitors should

be used to minimize output voltage ripple. Multilayer

ceramic capacitors are an excellent choice as they have

extremely low ESR and are available in small footprints.

The following equations show the minimum capacitance

under the required output voltage ripple for step-up and

step-down converters. In actual application, capacitance

usually decreases a lot as its DC bias increases. So when

selected output capacitors, not only calculating the out-

put capacitor minimum values are necessary according

to the equations, but the actual capacitance must be

carefully considered to get expected output voltage rip-

ple. X5R and X7R dielectric materials of ceramic capaci-

tors are preferred for their ability to maintain capaci-

tance over wide voltage and temperature ranges.

To step-up converter,

COUT ≥ D · IOUT

∆VOUT · f

To step-down converter,

COUT ≥ · (1 - D)

VOUT

8 · f2 · L · ∆VOUT

For example, to step-up converter, when VIN = 3.6V, IOUT

= 900mA, and f = 1.5MHz, output ripple requires below

30mV. According to the equation above, the calculated

COUT should be higher than 5.6µF. If use Sumida 22µF/6.3V

0805 ceramic capacitor, its capacitance at 5V DC bias is

8.0µF which can meet the ripple requirements.

Input capacitors for input decoupling should be located

as close as possible to the device to get better input

power filtering effect. Select 1

F to 4.7

F X5R or X7R

ceramic capacitors for the inputs. Table 4 shows sug-

gested capacitor part numbers.

Manufacturer Part Number

Inductance

(µH)

Max DC

Current

(A)

DCR

(mΩ)

Size (mm)

LxWxH Type

Suit for

Channel

Sumida

CDRH4D22/HP 2.2 3.2 35.4 4.5x4.5x2.4 shielded SU

CDRH8D28 2.5 4.5 12 8.3x8.3x3 shielded SU

CDRH2D09

2.5 0.53 120 3.2x3.2x1.0 shielded Main SD, SD1, SD2

2.2 0.60 115 3.2x3.2x1.0 shielded Main SD, SD1, SD2

1.8 0.65 105 3.2x3.2x1.0 shielded SD2

CDRH2D09C 3.3 0.50 139 3.2x3.2x1.0 shielded Main SU

CDRH2D14 4.7 1.0 135 3.2x3.2x1.55 shielded AUX1, AUX2, AUX3

CDRH2D11/HP 4.7 0.75 190 3.2x3.2x1.2 shielded

CDRH2D18/HP 2.2 1.6 48 3.2x3.2x2.0 shielded Main SD, SD1, SD2

CDRH2D18/HP 4.7 1.2 110 3.2x3.2x2.0 shielded AUX1, AUX2, AUX3

Cooper

SD3110 2.2 1.0 149 3.1x3.1x1.0 shielded Main SD, SD1, SD2

SD3110 3.3 0.81 195 3.1x3.1x1.0 shielded Main SU, SD1, SD2

SD3112 4.7 0.80 246 3.1x3.1x1.2 shielded AUX1, AUX2, AUX3

Murata

LQH32PN2R2NN0 2.2 1.6 76 3.2x2.5x1.55 unshielded Main SD, SD1, SD2

LQH32PN3R3NN0 3.3 1.2 120 3.2x2.5x1.55 unshielded Main SU, SD1, SD2

LQH32PN4R7NN0 4.7 1.0 180 3.2x2.5x1.55 unshielded AUX1, AUX2, AUX3

Table 3: Suggested Inductor Selection Information.

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Manufacturer Value (µF) Voltage (V) Case Size Part Number

Channel / Capacitor

Position

Murata

1 25 0603 GRM188R61E105K AUX1 / output

1 10 0603 GRM185R61A105K SD1, SD2, AUX1, AUX2,

AUX3 / input

3.3 10 0603 GRM188R61A335K AUX3 / output

4.7 25 0805 GRM21BR61E475K AUX2 / output

4.7 6.3 0603 GRM188R60J475K SU, Main / input

Main SD, SD1, SD2 / output

10 6.3 0805 GRM219R60J106KE19 Main SU, SD1, SD2

22 6.3 0805 GRM21BR60J226M SU, Main SU / output

Table 4: Suggested Input and Output Capacitor Selection Information.

Output Diode

A Schottky diode is suitable in the three non-synchronous

step-up channels for its low forward voltage and fast

recovery time. 20V rated Schottky diodes are recom-

mended for outputs less than 10V, while 30V rated

Schottky diodes are recommended for outputs greater

than 10V. Table 5 shows suggested diode part numbers.

Using SEQ for Power Sequence

Power sequence delay is designed to connect the loads

to Main channel output after its normal startup. Use the

SEQ output signal to control an external PMOSFET con-

nected between Main output and loads. The SEQ output

is high impedance lasted for 10ms when startup, then

pulled low after both the SD1 and SD2 converters com-

pleted soft-start and achieved output regulation. When

SD1 and SD2 are disabled, SEQ is also pulled low after

10ms when Main channel achieves regulation.

Using SCF for Full-Load Startup

SCF goes high (high impedance, open drain) when over-

load protection occurs. Under normal operation, SCF

pulls low. It can be used to drive a P-channel MOSFET

switch that turns off the load of a selected supply in the

event of an overload. Or, it can remove the load until the

supply reaches regulation, effectively allowing full load

startup.

Thermal Considerations

Thermal design is an important aspect of power manage-

ment IC applications and PCB layout. The AAT2610

TQFN55-40L package can provide up to 2W of power dis-

sipation when it is properly soldered onto a printed circuit

board with thermal vias. The package has a maximum

thermal resistance of 25°C/W. The maximum power dis-

sipation in a given ambient condition can be calculated:

J(MAX) -

)

D(MAX)

= θ

Where:

PD(MAX) = Maximum Power Dissipation (W)

θJA = Package Thermal Resistance (°C/W)

TJ(MAX) = Maximum Device Junction Temperature (°C)

[150°C]

TA = Ambient Temperature (°C)

The power dissipation for the synchronous buck channel

in CCM (Continuous Conduction Mode) can be calculated

by the following equation:

PSyn-BUCK = IOUTBUCK2 · RDS(ON)P · + RDS(ON)N · 1 -

VINBUCK

VOUTBUCK

VINBUCK

VOUTBUCK

Where:

PSyn-BUCK = Synchronous Buck Channel Power Dissipation

IOUTBUCK = Synchronous Buck Channel Output Current

VOUTBUCK = Synchronous Buck Channel Output Voltage

VINBUCK = Synchronous Buck Channel Input Voltage

RDS(ON)x = Synchronous Buck Channel PMOS or NMOS

Drain-Source On Resistance

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The power dissipation for the synchronous boost channel

in CCM can be calculated by the following equation:

PSyn-BOOST = IINBOOST2 · RDS(ON)P · + RDS(ON)N · 1 -

VINBOOST

VOUTBOOST

VINBOOST

VOUTBOOST

Where:

PSyn-BOOST = Synchronous Boost Channel Power

Dissipation

IINBOOST = Synchronous Boost Channel Input Current

VOUTBOOST = Synchronous Boost Channel Output Voltage

VINBOOST = Synchronous Boost Channel Input Voltage

RDS(ON)x = Synchronous Boost Channel PMOS or NMOS

Drain-Source On Resistance

The power dissipation for the non-synchronous boost

channel can be calculated by the following equation:

PNonsyn-BOOST = IINBOOST2 · RDS(ON)N · 1 - VINBOOST

VOUTBOOST

Where:

PNonsyn-BOOST = Non-Synchronous Boost Channel Power

Dissipation

IINBOOST = Non-Synchronous Boost Channel Input

Current

VOUTBOOST = Non-Synchronous Boost Channel Output

Voltage

VINBOOST = Non-Synchronous Boost Channel Input

Voltage

RDS(ON)N = Non-Synchronous Boost Channel internal

NMOS Drain-Source On Resistance

The power dissipation for the inverting channel in CCM

can be calculated by the following equation:

PNonsyn-BUCKBOOST = IIN-BUCKBOOST2 · RDS(ON)P · VOUT-BUCKBOOST

VIN-BUCKBOOST - VOUT-BUCKBOOST

Where:

PNonsyn-BUCKBOOST = Non-Synchronous Buck/Boost Channel

Power Dissipation

IIN-BUCKBOOST = Non-Synchronous Buck/Boost Channel

Input Current

VOUT-BUCKBOOST = Non-Synchronous Buck/Boost Channel

Output Voltage

VIN-BUCKBOOST = Non-Synchronous Buck/Boost Channel

Input Voltage

RDS(ON)P = Non-Synchronous Buck/Boost Channel inter-

nal PMOS Drain-Source On Resistance

Layout Guidance

When laying out the PC board, the following layout

guideline should be followed to ensure proper operation

of the AAT2610:

1. The exposed pad (EP) must be reliably soldered to

the GND plane for better power dissipation. A PGND

pad below EP is required.

2. The power traces, including the GND trace, the LX

trace and the IN trace should be kept short, direct

and wide to allow large current flow. Each inductor

of the seven channels should be connected to the LX

pins as short as possible. Use several VIA pads when

routing between layers to decrease the conduction

resistance.

3. The input filter capacitor of each channel should con-

nect as closely as possible to IN (Pins 3, 8, 15, 29,

33 and 35) and GND (Pins 5, 6, 26, 27 and 37) to

get good power filtering.

4. Keep the switching node, LX (Pins 4, 7, 25, 29, 34,

36 and 38), away from the sensitive FB node.

5. The feedback trace should be separate from any

power trace and connect as closely as possible to the

load point. Sensing along a high-current load trace

will degrade DC load regulation. The external feed-

back resistors should be placed as closely as possible

to the FB pin (Pin 1, 2, 9, 23, 30, 32 and 40) to

minimize the length of the high impedance feedback

trace.

6. It is recommended to connect the external feedback

resistor divider to the signal ground (Pin 16). The

signal ground and power ground should be con-

nected at a single point to alleviate the power

ground noise affecting the feedback voltage.

7. The resistance of the trace from the load return to

PGND should be kept to a minimum. This will help to

minimize any error in DC regulation due to differ-

ences in the potential of the internal signal ground

and the power ground.

Figure 4 and 5 show the AAT2610 evaluation board lay-

out with 4 layers.

AAT2610

7-Channel PMU for Digital Still Cameras

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AAT2610

7-Channel PMU for Digital Still Cameras

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Manufacturer Part Number

Rated

Forward

Current (A)

Non-

Repetitive

Peak Surge

Current (A)

Rated

Voltage (V)

Thermal

Resistance

(RθJA, °C/W) Package

ON Semi MBR0530T 0.5 5.5 30 206 SOD-123

MBR0520LT 0.5 5.5 20 206 SOD-123

Diodes BAT42W 0.2 4 30 500 SOD-123

Zetex ZHCS350 0.35 4.2 40 330 SOD-523

Central Semi CMDSH2-3 0.2 1.0 30 500 SOD-323

Table 5: Suggested Schottky Diode Selection Information.

VBAT

187k

R301

59k

R302

2.2uH

10uF

C302 +2.5 V

VSD1

4.7uH

22uF

C103A

4.7uF

C601

MBR0530

1.42M

R601

59k

R602

4.7uH

4.7uF

C501

VBAT

MBR0530

1uF/25 V

C502

D501

D502

D503

D504

VAUX1

LXL1

JENSU

JENM

JENSD1

JENSD2

JENL1

PVSU

GND

4.7uF

C301

LXSU

GND

4.7uH

MBR0530

PVSU

FBL3

10uF/16V

C702B

732k

R701

59k

R702

VREF3

-7.5V

VAUX3

FBL3

432k

R101

59k

R102

4.7uF

C101

2.2uH

VSU=(1+R101/R102)*0.6

PVSU

+5V

VSU

3.3uH

L2SD

22uF

C202

267k

R201

59k

R202

+3.3V

22uF for

MSU only

C201B

2.2uH

L2SU

VM=(1+R3/R4)*0.6

VBAT

VSD1=(1+R301 /R302 )*0.6

VBAT

118k

R4012.2uH

4.7uF

C402

VSD2

+1.8V

4.7uF

C401

VSD2=(1+R401 /R402 )*0.6

OVL1 =(1+R501/R502)*0.6

VAUX3=-0.6*(R701/R702)

WLED-

4.7uF

C701

Main Channel Step-up: place C 204, L2SU, R2U1, C201AB, R2U2 , R2U3

59k

R402

OVL1

+15V

VAUX2

10uF/16V

C602A

10uF

Main Channel Step-down: place R2D1, C201A, L2SD, C202, R2D2

R104

SCF

AAT2610

CSL1

FBL2

ENSD2

LXSD14

PVSD13

ENM

LXL3

LXL1

LXL2

PV 17

OVL1

FBSU 23

ENSU

FBM9

ENSD1

LXSD228

VIN15

LXSU 25

FBSD12

PVSD229

FBSD230

PVSU 24

LXM7

PVM8

ENL1

FBL3

PVL3

PGM

6PGSU

PGSD1

GND

16 PGL

SCF22

PGSD2

SEQ10

VREF3

PVL

ENL3

12 ENL2

SUSD

1.54M

R501

59k

R502

CSL1

PVSU

AUX1

AUX3VREF3

JENL2

JENL3

R2U3

R2D2

PVSU

1uF

C703

1uF

C102

SUSD=PVSU: Ma in channel is set to boost

SUSD=GND: Main channel is set to buck

4.7uF

C204

4.7uF

C503

VAUX2=1+R601 /R602 )*0.6

SGND

PGND

SGND

R2D1

R2U1

R303

R403

R2U2

R503

3.9pF for Li-ion

/1.5pF for 2AA

C704

PVSU 0

R505

R506

D505

2 1

D506 0

R504

VBAT

PVSU 0

R603

R604

56pF for Li-ion

/6.8 pF for 2A A

C603

0R704

10uF/16V

C702A

10uF /16V

C602B

56pF for MSD/82pF for MSU

C203

VBAT 0

R703

22uF

C103B

27pF

C104

PVL3

/SEQ

R507

22uF for

MSU /4.7uF

for MSD

C201A

R304 PVSU

R404 PVSU

Figure 4: AAT2610 Evaluation Board Schematic.

AAT2610

7-Channel PMU for Digital Still Cameras

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(a) Top Layer (b) Internal GND Layer

Figure 5: AAT2610 Evaluation Board PCB Layout.

AAT2610

7-Channel PMU for Digital Still Cameras

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7-Channel PMU for Digital Still Cameras

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7-Channel PMU for Digital Still Cameras

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Designation Part Number Description Manufacturer

IC Device

U1 AAT2610IIC Seven-Channel High Efciency Power

Management Unit AnalogicTech

Capacitor

C T494B106M010AS CAP TAN 10μF B 10V 20% KEMET

C101 GRM21BR61C475K CAP Ceramic 4.7μF 0805 X5R 16V 10%

Murata

C102, C703 GRM185R61A105K CAP Ceramic 1μF 0603 X5R 10V 10%

C103A, C103B, C202 GRM21BR60J226M CAP Ceramic 22μF 0805 X5R 6.3V 20%

C104 GRM1885C1H270J CAP Ceramic 27pF 0603 C0G 50V 5%

C201A, C301, C401, C402,

C501, C503, C601, C701 GRM188R60J475K CAP Ceramic 4.7μF 0603 X5R 6.3V 10%

C203, C603 GRM1885C1H560J CAP Ceramic 56pF 0603 C0G 50V 5%

C302 GRM188R60J106M CAP Ceramic 10μF 0603 X5R 6.3V 20%

C303, C403 GRM1885C1H100J CAP Ceramic 10pF 0603 C0G 50V 5%

C502 GRM188R61E105K CAP Ceramic 1μF 0603 X5R 25V 10%

C602A, C602B, C702A, C702B GRM21BR61C106K CAP Ceramic 10μF 0805 X5R 16V 10%

C704 GRM1885C1H3R9D CAP Ceramic 3.9pF 0603 C0G 50V ±0.5pF

Inductor

L1 CDRH4D22/HP-2R2NC Power Inductor 2.2μH 3.2A SMD

Sumida

L2SD CDRH2D14-3R3NC Power Inductor 3.3μH 1.2A SMD

L3, L4 CDRH2D18/HPNP-2R2NC Power Inductor 2.2μH 1.6A SMD

L5, L6, L7 CDRH2D14 NP-4R7NC Power Inductor 4.7μH 1.0A SMD

Resistor

R2D1, R2D2, R303 R403, R503,

R504, R506, R604, R703 RC0603FR-070RL RES 0Ω 1/10W 1% 0603 SMD

Yageo

R101 RC0603FR-07432KL RES 432KΩ 1/10W 1% 0603 SMD

R102, R202, R302 R402, R502,

R602, R702 RC0603FR-0759KL RES 59KΩ 1/10W 1% 0603 SMD

R201 RC0603FR-07267KL RES 267KΩ 1/10W 1% 0603 SMD

R301 RC0603FR-07187KL RES 187KΩ 1/10W 1% 0603 SMD

R401 RC0603FR-07118KL RES 118KΩ 1/10W 1% 0603 SMD

R501 RC0603FR-071M54L RES 1.54MΩ 1/10W 1% 0603 SMD

R601 RC0402FR-071M42L RES 1.42MΩ 1/16W 1% 0402 SMD

R701 RC0603FR-07732KL RES 732KΩ 1/10W 1% 0603 SMD

Other

D501, D502, D503, D504 RS-0805 30mA White LED 0805 Realstar

D5, D6, D7 MBR0530 Diode Schottky 0.5A 30V SOD-123 International

Rectier

Table 6: AAT2610 Li-ion Application Demo Board Bill of Materials (BOM).

AAT2610

7-Channel PMU for Digital Still Cameras

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Designation Part Number Description Manufacturer

IC Device

U1 AAT2610IIC Seven-Channel High Efciency Power

Management Unit AnalogicTech

Capacitor

C T494B106M010AS CAP TAN 10μF B 10V 20% KEMET

C101 GRM21BR61C475K CAP Ceramic 4.7μF 0805 X5R 16V 10%

Murata

C102, C703 GRM185R61A105K CAP Ceramic 1μF 0603 X5R 10V 10%

C103A, C201A, C201B, C302 GRM21BR60J226M CAP Ceramic 22μF 0805 X5R 6.3V 20%

C203 GRM1885C1H820J CAP Ceramic 82pF 0603 C0G 50V 5%

C204, C301, C401, C402,

C501, C503, C601, C701 GRM188R60J475K CAP Ceramic 4.7μF 0603 X5R 6.3V 10%

C303 GRM1885C1H150J CAP Ceramic 15pF 0603 C0G 50V 5%

C403 GRM1885C1H5R6D CAP Ceramic 5.6pF 0603 C0G 50V ±0.5pF

C502 GRM21BR61E475KA CAP Ceramic 4.7μF 0805 X5R 25V 10%

C602A,C602B, C702A, C702B GRM21BR61C106K CAP Ceramic 10μF 0805 X5R 16V 10%

C603 GRM1885C1H6R8D CAP Ceramic 6.8pF 0603 C0G 50V ±0.5pF

C704 GRM1885C1H1R5D CAP Ceramic 1.5pF 0603 C0G 50V ±0.5pF

Inductor

L1 CDRH4D22/HP-2R2NC Power Inductor 2.2μH 3.2A SMD

Sumida

L2SU, L3, L4 CDRH2D18/HPNP-2R2NC Power Inductor 2.2μH 1.6A SMD

L5, CDRH2D14 NP-4R7NC Power Inductor 4.7μH 1.0A SMD

L6, L7 CDRH2D18/HP-100 Power Inductor 10μH 0.85A SMD

Resistor

R2U1, R2U2, R2U3 R303,

R404, R503, R504, R506,

R604, R704

RC0603FR-070RL RES 0Ω 1/10W 1% 0603 SMD

Yageo

R101 RC0603FR-07432KL RES 432KΩ1/10W 1% 0603 SMD

R102, R202, R301, R302,

R402, R502, R602 RC0603FR-0759KL RES 59KΩ1/10W 1% 0603 SMD

R201 RC0603FR-07267KL RES 267KΩ1/10W 1% 0603 SMD

R401 RC0603FR-07187KL RES 187KΩ 1/10W 1% 0603 SMD

R501 RC0603FR-071M54L RES 1.54MΩ 1/10W 1% 0603 SMD

R601 RC0603FR-071M2L RES 1.2MΩ 1/10W 1% 0603 SMD

R701 RC0603FR-07732KL RES 732KΩ 1/10W 1% 0603 SMD

R702 RC0603FR-0751KL RES 51KΩ 1/10W 1% 0603 SMD

Other

D501, D502, D503, D504 RS-0805 30mA White LED 0805 Realstar

D5, D6, D7 MBR0530 Diode Schottky 0.5A 30V SOD-123 International

Rectier

Table 7: AAT2610 2AA Application Demo Board Bill of Material (BOM).

AAT2610

7-Channel PMU for Digital Still Cameras

PRODUCT DATASHEET Gill Sans MT Bold Italic

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AAT2610

7-Channel PMU for Digital Still Cameras

PRODUCT DATASHEET Gill Sans MT Bold Italic

15/18, convert to outlines

AAT2610

7-Channel PMU for Digital Still Cameras

PRODUCT DATASHEET Gill Sans MT Bold Italic

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7-Channel PMU for Digital Still Cameras

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Ordering Information

Output Voltage Package Marking1Part Number(Tape & Reel)2

Adj. 0.6V TQFN55-40L 3GXYY AAT2610IIC-T1

All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means semiconductor

products that are in compliance with current RoHS standards, including the requirement that lead not exceed

0.1% by weight in homogeneous materials. For more information, please visit our website at

http://www.analogictech.com/about/quality.aspx.

Package Information

TQFN55-40L3

Top View

Side View

Bottom View

5.000 ± 0.050

Pin 1 Dot

by Marking

Pin 1 Identification

Chamfer 0.300 x 45°

3.600 ± 0.050

0.450 ± 0.050

0.380 ± 0.050

0.200 ± 0.0500.400 BSC

0.750 ± 0.050

0.000 + 0.100

- 0.000

0.203 REF

All dimensions in millimeters.

1. XYY = assembly and date code.

2. Sample stock is generally held on part numbers listed in BOLD.

3. The leadless package family, which includes QFN, TQFN, DFN, TDFN and STDFN, has exposed copper (unplated) at the end of the lead terminals due to the manufacturing

process. A solder fillet at the exposed copper edge cannot be guaranteed and is not required to ensure a proper bottom solder connection.

AAT2610

7-Channel PMU for Digital Still Cameras

PRODUCT DATASHEET Gill Sans MT Bold Italic

15/18, convert to outlines

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AAT2610

7-Channel PMU for Digital Still Cameras

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Advanced Analogic Technologies, Inc.

3230 Scott Boulevard, Santa Clara, CA 95054

Phone (408) 737-4600

Fax (408) 737-4611

AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual

property rights are implied. AnalogicTech reserves the right to make changes to their products or specications or to discontinue any product or service without notice. Except as provided in AnalogicTech’s terms and

conditions of sale, AnalogicTech assumes no liability whatsoever, and AnalogicTech disclaims any express or implied warranty relating to the sale and/or use of AnalogicTech products including liability or warranties

relating to tness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. In order to minimize risks associated with the customer’s applications, adequate

design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. Testing and other quality control techniques are utilized to the extent AnalogicTech deems necessary to

support this warranty. Specic testing of all parameters of each device is not necessarily performed. AnalogicTech and the AnalogicTech logo are trademarks of Advanced Analogic Technologies Incorporated. All other

brand and product names appearing in this document are registered trademarks or trademarks of their respective holders.