MIC69302WR - MICROCHIP TECHNOLOGY

MIC69301/2/3

Single Supply VIN, Low VIN, Low VOUT, 3A

LDO

MLF and MicroLeadFrame are registered trademarks of Amkor Technologies, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

General Description

The MIC69301/2/3 is the 3A output current member of the

MIC69xxx family of high current, low voltage regulators,

which support currents of 1A, 1.5A, 3A, and 5A. This

family operates from a single low voltage supply, yet offers

high precision and ultra low dropout of 500mV under worst

case conditions.

The MIC69301/2/3 operates from an input voltage of 1.65V

to 5.5V. It is designed to drive digital circuits requiring low

voltage at high currents (i.e., PLDs, DSP, microcontroller,

etc.). These regulators are available in adjustable and

fixed output voltages. The adjustable version can support

output voltages down to 0.5V.

The µCap design of the MIC69301/2/3 is optimized for

stability with low value, low-ESR ceramic output

capacitors.

Features of the MIC69301/2/3 include thermal shutdown

and current limit protection. Logic enable and error flag

pins are also available.

The MIC69301/2/3 is offered in TO-263, S-PAK and the

ePad SOIC-8 packages. The MIC69303 is also available in

a 12-Pin 4mm x 4mm MLFTM package. All packages have

an operating temperature range of –40°C to +125°C.

Datasheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Features

• Input voltage range: VIN: 1.65V to 5.5V

• Maximum dropout (VIN – VOUT) of 500mV

over temperature

• Adjustable output voltage down to 0.5V

• Stable with 10µF ceramic output capacitor

• Excellent line and load regulation

• Logic controlled shutdown

• Thermal shutdown and current-limit protection

• Error flag output

• 5-Pin TO-263

• 5-Pin S-Pak package

• ePad SOIC-8 package

• 12-Pin 4mm x 4mm MLFTM package (MIC69303 only)

• –40°C to +125°C junction temperature range

Applications

• Point-of-load applications

• Industrial power

• Sensitive RF applications

___________________________________________________________________________________________________________

Typical Application

*Error Flag Output MIC69303 only

Fixed 1.2V Regulato r w /Error Flag Output Adjustable Regulator

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Ordering Information

Part Number Nominal

Output Voltage Flag Output Junction

Temperature Range Package Lead Finish

MIC69301-1.2YME 1.2V Yes –40° to +125°C 8-Pin ePad SOIC Pb Free

MIC69301-1.2WR 1.2V Yes –40° to +125°C 5-Pin S-PAK RoHS Compliant

MIC69301-1.2WU 1.2V Yes –40° to +125°C 5-Pin TO-263 RoHS Compliant

MIC69302WR Adj. No –40° to +125°C 5-Pin S-PAK RoHS Compliant

MIC69302WU Adj. No –40° to +125°C 5-Pin TO-263 RoHS Compliant

MIC69303YME Adj. Yes –40° to +125°C 8-Pin ePad SOIC Pb Free

MIC69303YML Adj. Yes –40° to +125°C 12-Pin 4mm x 4mm MLFTM Pb Free

Pin Configur ation

5-Pin TO-263 (U)

(Adjustable Voltage)

5-Pin TO-263 (U)

(Fixed Voltage with Flag)

5-Pin S-PAK (R)

(Adjustable Voltage)

5-Pin S-PAK (R)

(Fixed Voltage with Flag)

8-Pin ePad SOIC (ME)

(Adjustable Voltage)

8-Pin ePad SOIC (ME)

(Fixed Voltage with Flag)

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12-Pin 4mm x 4mm MLFTM (ML)

(Adjustable Voltage with Flag)

Pin Description

Number

(Fixed)

SPAK-5

TO-263-5

Number

(Adjustable)

SPAK-5

TO-263-5

Number

(Fixed)

ePad

SOIC-8

Number

(Adjustable)

ePad

SOIC-8

Number

(Adjustable)

ePad

4mm x 4mm

MLFTM

Name Pin Function

1 1 2 2 3 EN

Enable (Input): CMOS compatible input. Logic

high = enable, logic low = shutdown. Do not

leave pin floating.

2 2 3,4 3,4 4, 5, 6 IN Input voltage which supplies current to the

output power device.

3, TAB 3, TAB 1 1 1 GND Ground (TAB is connected to ground on S-Pak

and TO-263).

4 4 5,6 5,6 7, 9 OUT Regulator Output.

— — 7 — — SNS

Output voltage sense. Connect to output

voltage.

— 5 — 7 11 ADJ

Adjustable regulator feedback input. Connect

to resistor voltage divider.

5 — 8 8 12 FLG

Error Flag (Output): Open collector output.

Active low indicates an output fault condition.

— — EP EP EP EP Exposed pad. Connect to GND.

— — — — 2, 8, 10 NC No Connect. Not internally connected.

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Absolute Maximum Ratings(1)

Supply Input Voltage (VIN to GND) .................. –0.3V to +6V

Logic Input Voltage (VEN to GND). .......–0.3V to (VIN + 0.3V)

Fault Flag(VFLG to GND ..................................... –0.3V to 6V

Storage Temperature (TS).........................–65°C to +125°C

Lead Temperature(TS) .............................................. 260°C

ESD(4) ............................................................................. 2kV

Operating Ratings(2)

Supply Voltage (VIN)....................................... 1.65V to 5.5V

Enable Input Voltage (VEN)..................................... 0V to VIN

Junction Temperature (TJ) ..................–40°C ≤ TJ ≤ +125°C

Power Dissipation (PD)........................... Internally Limited(3)

Package Thermal Resistance

S-PAK-5 (θJC).......................................................2°C/W

S-PAK-5 (θJA).....................................................38°C/W

TO-263-5 (θJC) .....................................................2°C/W

ePad SOIC-8 (θJA) .............................................41°C/W

4x4 MLF-12L(θJA) .............................................60°C/W

Electrical Characteristics(4)

TA = 25°C with VIN = VOUT + 1V; bold values indicate –40°C< TJ < +125°C; IOUT = 10mA; COUT = 10µF ceramic, unless noted.

Parameter Test Conditions Min Typ Max Unit

Power Input Supply

Input Voltage Range (VIN) 1.65 5.5 V

IOUT = 10mA 1.2 5 mA

IOUT = 1.5A 12 30 mA

Ground Pin Current

IOUT = 3.0A 32 75 mA

Ground Pin Current in Shutdown VEN = 0V; VIN = 2.0V; VOUT = 0V 1 µA

Output Voltage

Output Voltage (Fixed) -2.0 2.0 %

Load Regulation IOUT = 10mA to 3A ±0.3 %

Line Regulation(5) V

IN = VOUT + 1.0V to 5.5V 0.2 0.3 %/V

Reference (Adjustable)

Feedback Reference Voltage

(ADJ Pin) (+/- 2.0%) 0.490 0.5 0.510 V

Feedback Bias Current VADJ = 0.5V 0.25 1.0 µA

Current Limit

Current Limit VOUT = 0V 3.3 5.2 A

Power Dropout Voltage

IOUT = 1.5A 200 300 mV

Dropout Voltage (VIN - VOUT)(6) IOUT = 3.0A 275 500 mV

Enable Input

Regulator Enabled 0.8 0.57 V

Enable Input Threshold Regulator Shutdown 0.2 V

VEN ≤ 0.2V ( Regulator Shutdown) 0.0 µA

Enable Pin Bias Current VEN ≥ 0.8V ( Regulator Enabled) 7.0 µA

Turn-on Time 90% of typical VOUT; VEN = VIN 10

150 µs

Fault Output

Fault Threshold Voltage % of VOUT below nominal output

(VOUT Falling) 7.5 10 14 %

Fault Hysteresis 2.0 %

Fault Output Low Voltage IFLG = 250μA (sinking), VEN = 0V 150 mV

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Electrical Characteristics(4) (Continued)

TA = 25°C with VIN = VOUT + 1V; bold values indicate –40°C< TJ < +125°C; IOUT = 10mA; COUT = 10µF ceramic, unless

noted.

Fault Leakage Current VFLG = 5.0V; VEN = 0V 0.05 μA

Thermal Protection

Over-Temperature Shutdown TJ Rising 165 °C

Over-Temperature Shutdown

Hysteresis 10 °C

Notes:

1. Exceeding the absolute maximum rating may damage the device.

2. The device is not guaranteed to function outside its operating rating.

3. The maximum allowable power dissipation of any TA (ambient temperature) is (PD(max) = TJ(max) – TA) / θJA. Exceeding the maximum allowable power

dissipation will result in excessive die temperature and the regulator will go into thermal shutdown.

4. Specification for packaged product only.

5. Minimum input for line regulation test is set to VOUT + 1V relative to the highest output voltage.

6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at 1V differential.

For outputs below 1.65V, dropout voltage is considered the input-to-output voltage differential with the minimum input voltage of 1.65V. Minimum

input operating voltage is 1.65V.

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Typical Characteristics

Power Supply

Rejection Ratio

1K 10K

FREQUENCY (Hz)

VIN = 3.3V

VOUT = 1.8V

IOUT = 0.5A

100

150

200

250

300

0 0.5 1.0 1.5 2.0 2.5 3.0

OUTPUT CURRENT (A)

Dropout Voltage

vs. Output Current

VOUT = 1.2V

COUT = 10µF

0.2

0.4

0.6

0.8

1.0

1.2

1.4

0 0.5 1.0 1.5 2.0 2.5

INPUT VOLTAGE (V)

Dropout Voltage

vs. Input Voltage

VOUT = 1.2V

COUT = 10µF

500mA

1.5A

100

150

200

250

300

350

400

Dropout Voltage

vs. Temperature

20 40 60 80

TEMPERATURE (°C)

VOUT = 1.2V

COUT = 10µF

IOUT = 1.5A

IOUT = 3A

0 0.5 1.0 1.5 2.0 2.5 3

OUTPUT CURRENT (A)

Ground Current

vs. Output Current

VIN = 2.2V

VOUT = 1.2V

COUT = 10µF

Ground Current

vs. Temperature

20 40 60 80

TEMPERATURE (°C)

VIN = 2.2V

VOUT = 1.2V

COUT = 10µF

IOUT = 1.5A

IOUT = 3A

1.180

1.185

1.190

1.195

1.200

1.205

1.210

1.215

1.220

Output Voltage

vs. Temperature

20 40 60 80

TEMPERATURE (°C)

VIN = 2.2V

VOUT = 1.2V

IOUT = 10mA

COUT = 10µF

Current Limit

vs. Temperature

20 40 60 80

TEMPERATURE (°C)

VIN = 2.2V

VOUT = 1.2V

COUT = 10µF

1.100

1.125

1.150

1.175

1.200

1.225

1.250

1.275

1.300

0 0.5 1.0 1.5 2.0 2.5 3.0

OUTPUT CURRENT (A)

Load Regulation

VIN = 2.2V

VOUT = 1.2V

COUT = 10µF

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

Enable Threshold

vs. Temperature

20 40 60 80

TEMPERATURE (°C)

OFF

VIN = 2.2V

VOUT = 1.2V

IOUT = 100mA

COUT = 10µF

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Functional Characteristics

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Functional Diagram

Fixed Output Regulator

ENABLE

OUT

ADJ

VREF

0.5V

GND

Adjustable Output Regulator

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Application Information

The MIC69301/2/3 is an ultra-high performance low

dropout linear regulator designed for high current

applications requiring a fast transient response. It utilizes

a single input supply and has a very low dropout voltage

perfect for low-voltage DC-to-DC conversion. The

MIC69301/2/3 requires a minimum number of external

components.

The MIC69301/2/3 regulator is fully protected from

damage due to fault conditions offering constant current

limiting and thermal shutdown.

Input Supply Voltage

VIN provides a high current to the collector of the pass

transistor. The minimum input voltage is 1.65V allowing

conversion from low voltage supplies.

Output Capacitor

The MIC69301/2/3 requires a minimum of output

capacitance to maintain stability. However, proper

capacitor selection is important to ensure desired

transient response. The MIC69301/2/3 is specifically

designed to be stable with low ESR ceramic chip

capacitors. A 10µF ceramic chip capacitor should satisfy

most applications. Output capacitance can be increased

without bound. See typical characteristics for examples

of load transient response.

X7R dielectric ceramic capacitors are recommended

because of their temperature performance. X7R-type

capacitors change capacitance by only 15% over their

operating temperature range and are the most stable

type of ceramic capacitors. Z5U and Y5V dielectric

capacitors change value by as much as 50% and 60%,

respectively over their operating temperature ranges. To

use a ceramic chip capacitor with Y5V dielectric the

value must be much higher than an X7R ceramic or a

tantalum capacitor to ensure the same capacitance

value over the operating temperature range. Tantalum

capacitors have a very stable dielectric (10% over their

operating temperature range) and can also be used with

this device.

Input Capacitor

An input capacitor of 1µF or greater is recommended

when the device is more than 4 inches away from the

bulk supply capacitance or when the supply is a battery.

Small, surface mount, ceramic chip capacitors can be

used for the bypassing. The capacitor should be placed

within 1 inch of the device for optimal performance.

Larger values will help to improve ripple rejection by

bypassing the input to the regulator further improving the

integrity of the output voltage.

Minimum Load Current

The MIC69301/2/3 regulator is specified between finite

loads. If the output current is too small, leakage currents

dominate and the output voltage rises. A 10mA minimum

load current is necessary for proper operation.

Adjustable Regulator Design

The MIC69302 and MIC69303 adjustable version allows

programming the output voltage anywhere between 0.5V

and 5.0V with two resistors. The resistor value between

VOUT and the adjust pin should not exceed 10kΩ. Larger

values can cause instability. The resistor values are

calculated by:

⎟

⎠

⎞

⎜

⎝

⎛+×= 1

0.5V

OUT

where VOUT is the desired output voltage.

Enable

The fixed output voltage versions of the MIC69301

feature an active high enable input (EN) that allows on-

off control of the regulator. Current drain reduces to near

“zero” when the device is shutdown, with only

microamperes of leakage current. EN may be directly

tied to VIN and pulled up to the maximum supply voltage.

Thermal Design

Linear regulators are simple to use. The most

complicated design parameters to consider are thermal

characteristics. Thermal design requires the following

application-specific parameters:

• Maximum ambient temperature (TA)

• Output current (IOUT)

• Output voltage (VOUT)

• Input voltage (VIN)

• Ground current (IGND)

First, calculate the power dissipation of the regulator

from these numbers and the device parameters from this

data sheet.

D = (VIN – VOUT) x IOUT + VIN x IGND

where the ground current is approximated by using

numbers from the “Electrical Characteristics” or “Typical

Characteristics” sections. The heat sink thermal

resistance is then determined with this formula:

θSA = ((TJ(max) – TA)/ PD) – (θJC + θCS)

Where TJ(max) ≤125°C and θCS is between 0°C and

2°C/W.

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The heat sink may be significantly reduced in

applications where the minimum input voltage is known

and is large compared with the dropout voltage. Use a

series input resistor to drop excessive voltage and

distribute the heat between this resistor and the

regulator. The low dropout properties of Micrel Super

βeta PNP® regulators allow significant reductions in

regulator power dissipation and the associated heat sink

without compromising performance. When this technique

is employed, a capacitor of at least 1.0µF is needed

directly between the input and regulator ground.

Refer to “Application Note 9” for further details and

examples on thermal design and heat sink applications.

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Package Information

5-Pin S-PAK (R)

5-Pin TO-263 (U)

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8-Pin ePad SOIC (ME)

12-Pin ePad MLF 4x4 (ML)

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MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA

TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com

Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This

information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,

specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual

property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability

whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties

relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right.

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