XC9221A095MR-G - Torex Semiconductor

1/22

XC9220/XC9221 Series

16V Input Voltage, Step-Down DC/DC Controller ICs.

■GENERAL DESCRIPTION

The XC9220/XC9221 series is a group of multi-purpose step-down DC/DC controller ICs. The ICs enable a high efficiency,

stable power supply with an output current up to 3A to be configured using only a transistor, a coil, a diode, and two capacitors

connected externally. Low ESR capacitors such as a ceramic capacitor can be used as an output capacitor.

The XC9220/XC9221 series has a 0.9V (±1.5%) reference voltage, and using externally connected resistors, the output

voltage can be set freely. With an internal switching frequency of 300kHz and 500kHz 1.0MHz, small external components

can also be used. The XC9220 series is PWM control, and the XC9221 series is PWM/PFM mode, which automatically

switches from PWM to PFM during light loads and high efficiencies can be achieved over a wide range of load conditions.

As for the soft-start time, the XC9220/XC9221A and C series is internally set to 4msec and the XC9220/XC9221B and D

series can be externally set-up. With the built-in UVLO (Under Voltage Lock Out) function, the external P-channel driver

transistor is forced OFF when input voltage becomes 2.3V or lower.

■TYPICAL APPLICATION CIRCUIT

■APPLICATIONS

●Set top boxes

●Digital TVs

●DVD/HDD recorders

●Portable information terminals

●Notebook computers

■FEATURES

Operating Voltage Range : 2.8V ~ 16.0V

Output Vo ltage Externally Set Range

: 1.2V or more

(VFB=0.9V+1.5%)

Output Current : Less than 3.0A

Oscillation Frequency : 300kHz, 500kHz, and 1.0MHz

Control Methods : PWM control (XC9220)

PWM/PFM automatic switching

(XC9221)

Soft-Start Function : 4ms, internally set

(XC9220/XC9221A, 500kHz)

Externally set

(XC9220/XC9221B)

Protection Circuits : Integral protection (1.0 ms)

(XC9220/XC9221 Aand B series)

Short-circuit protection

Low ESR

Capacitor Compatible

: Ceramic capacitor

Operating Ambient T emperature : - 40℃~ + 85℃

Packages : SOT-25

USP-6C

Environmentally Friendly :

EU RoHS Compliant, Pb Free

■TYPICAL PERFORMANCE

CHARACTERISTICS

●Efficiency vs. Output Current

1 2 3

5 4

CE GND FB

EXT

FB1

FB2

SBD

Pc h

MOSFET

OUT

RSENSE

( for ceramic CL )

* RSENSE : Tantalum and electrolytic capacitors can be used, in w hich case,

RSENSE becomes unnecessary.

100

0.1 1 10 100 1000 10000

Output Current　IO UT (m A)

Efficiency 　EFFI (%)

VIN=5.0V

VIN=12.0V

VIN=16.0V

XC9221A095MR (VOUT=3.3V, FOSC=500kHz)

CIN=47μF (OS-Con), CL=47μF (OS-Con),

L=10μH (CDRH8D43, SUMIDA)

PchMOSFET: CPH3308 (SANYO), CDD=1.0μF (ceramic), RIN=10Ω

ETR0511-011

2/22

XC9220

XC9221 Series

PIN NUMBER

SOT-25 USP-6C PIN NAME FUNCTION

1 6 CE/CSS Chip Enable / Soft-Start

2 5 VSS Ground

3 4 FB Output Voltage Sense

4 3 EXT/ External Transistor Drive

- 2 NC No Connection

5 1 VIN Power Supply

DESIGNATOR ITEM SYMBOL DESCRIPTION

A Soft-start internally set with integral protection function

B Soft-start externally set with integral protection function

C Soft-start internally set without integral protection function

① Type of DC/DC Controller

ICs

D Soft-start externally set without integral protection function

②③ Output Voltage 09 FB Voltage (Fixed)

3 300kHz

5 500kHz

④ Oscillation Frequency

A 1.0MHz

MR SOT-25 (3,000/Reel)

MR-G SOT-25 (3,000/Reel)

ER USP-6C (3,000/Reel)

⑤⑥-⑦(*1) Packages (Order Unit)

ER-G USP-6C (3,000/Reel)

■PIN CONFIGURATION

SOT-25

(TOP VIEW)

USP-6C

(BOTTOM VIEW)

■PIN ASSIGNMENT

■PRODUCT CLASSIFICATION

●Ordering Information

XC9220①②③④⑤⑥-⑦(*1): PWM control

XC9221①②③④⑤⑥-⑦(*1): PWM/PFM automatic switching control

* The dissipation pad for the USP-6C package

(preliminary) should be solder-plated in

recommended mount pattern and metal

masking so as to enhance mounting strength

and heat release. If the pad needs to be

connected to other pins, it should be

connected to the VSS (No.5) pin.

123

5 4

CE/C

EXT/V

(*1) The “-G” suffix denotes Halogen and Antimony free as well as being fully RoHS compliant.

3/22

XC9220/XC9221

Series

●XC9220/21A and C series ● XC9220/21B and D series

PRODUCT TYPE

IC OPERATION

H Operation ON

L Operation OFF

A B C D

Soft-start externally set No Yes No Yes

Integral protection function Yes Yes No No

PARAMETER SYMBOL RATINGS UNITS

VIN Pin Voltage VIN -0.3 ～ +18.0 V

FB Pin Voltage VFB -0.3 ～ +18.0 V

CE/CSS Pin Voltage CE -0.3 ～ +18.0 V

EXT/ Pin Voltage VEXT - 0.3 ~ VIN + 0.3 V

EXT/ Pin Current IEXT + 100 mA

SOT-25 250

Power Dissipation USP-6C Pd 120 mW

Operating Ambient Temperature Topr - 40 ~ + 85 OC

Storage Temperature Tstg - 55 ~ +125 OC

■

BSOLUTE MAXIMUM RATINGS

Ta = 25 OC

■BLOCK DIAGRAMS

PWM/PFM Control LOGIC

OSC Enable

Err Amp

VREF

0.9V

Buffer EXT /

VIN

VSS

CE/CSS Chip Enable

Soft Start

(internal)

LOGIC Each circuit

Under Voltage

Lock Out

Short Circuit

Protection

MaxDutyLimit

Protection

Ramｐ

Wave OSC

RS Latch

Frequency :

1 MHz , 500 kHz , 300 kHz

Each circuit

PWM Wave

(XC9221series)

U.V.L.O

PWM

Comparator

* Diodes inside the circuits are ESD protection diodes and parasitic diodes.

■ FUNCTIONS

CHIP ENABLE

4/22

XC9220

XC9221 Series

Unless otherwise stated, VIN=5.0V

NOTE:

*1: EFFI = { (output voltage) x (output current)} / { (input voltage) x (input current) } x 100

*2: No Integral protection function is available with the XC9220/9221 C series.

** Refer to the CHARACTERISTICS CHART BY OSCILLATION FREQUENCY.

PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNIT.

CIRCUIT

FB Voltage VFB 0.8865 0.9000 0.9135 V 2

Input Voltage Range VIN 2.8 - 16.0 V -

UVLO Voltage

(Minimum Operating Voltage) VUVLO 1.9 2.3 2.7 V 3

Supply Current 2 IDD2 VIN=5.0V, FB=1.0V ** μA 1

Stand-by Current ISTB - 0.1 1.0 μA 1

Oscillation Frequency fOSC Connected to external

components ** kHz 3

Maximum Duty Ratio MAXDTY 100 - - % 2

PFM Duty Ratio PFMDTY No load (XC9221 series only) 15 25 35 % 3

EXT/ High On Resistance REXTBH 6 10 16 Ω 4

EXT/ Low On Resistance REXTBL 6 12 20 Ω 4

Integral Protection Time

(*2) tPRO (XC9220/9221 A series) ** ms 2

Short-Circuit Protection VSHORT - - 0.7 V 2

Soft-Start Time tSS ** ms 2

Efficiency (*1) EFFI - 92 - % 3

UVFB FB Voltage

Temperature Characteristics UToprVFB - +100 - ppm

/OC 2

CE “High” Level Voltage VCEH 1.2 - - V 2

CE “Low” Level Voltage VCEL - - 0.3 V 3

CE “High” Level Current ICEH VIN=CE=16V - 0.1 - 0.1 μA 1

CE “Low” Level Current ICEL VIN=16V, CE=0V - 0.1 - 0.1 μA 1

FB “High” Level Current IFBH VIN=FB=16V - 0.1 - 0.1 μA 4

FB “Low” Level Current IFBL VIN=16V, FB=0V - 0.1 - 0.1 μA 4

■ELECTRICAL CHARACTERISTICS

XC9220/XC9221 A and C series Ta = 25 OC

5/22

XC9220/XC9221

Series

Unless otherwise stated, VIN=5.0V

External components: CSS=0.1μF, RSS=200kΩ

NOTE:

*1: Internal soft-start time: In case where the U.V.L.O. function operates temporarily due to the power cutoff etc. when an external CSS is

charged (VCE>2.6V), the IC restarts operation by the internal soft-start time. Minimum value of soft-start time set externally is equal to the

internal soft-start time.

*2: EFFI={ (output voltage) x (output current) } / { (input voltage) x (input current) } x 100

*3: The integral latch and short-circuit protection do not function when the CE/CSS pin voltage become lower than 2.6V while the soft-start time.

*4: No Integral protection function is available with the XC9220/XC9221 D series.

** Refer to the CHARACTERISTICS CHART BY OSCILLATION FREQUENCY.

300kHz 500kHz 1.0MHz

PARAMETER SYMBOL MIN. TYP. MAX. MIN. TYP. MAX. MIN. TYP. MAX.

Supply Current 2 IDD2 - 25 50 - 25 50 - 40 80

Oscillation Frequency fosc 255 300 345 425 500 575 850 1000 1150

Integral Protection Time tPRO 0.5 1.0 2.0 0.5 1.0 2.0 0.25 0.50 1.00

Soft-Start Time tSS 2 4 8 2 4 8 1 2 4

PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNIT.

CIRCUIT

FB Voltage VFB 0.8865 0.9000 0.9135 V 2

Input Voltage Range VIN 2.8 - 16.0 V -

UVLO Voltage

(Minimum Operating Voltage) VUVLO 1.9 2.3 2.7 V 3

Supply Current 2 IDD2 VIN=5.0V, FB=1.0V ** μA 1

Stand-by Current ISTB - 0.1 1.0 μA 1

Oscillation Frequency fOSC Connected to external

components ** kHz 3

Maximum Duty Ratio MAXDTY 100 - - % 2

PFM Duty Ratio PFMDTY No load (XC9221 series only) 15 25 35 % 3

EXT/ High On Resistance REXTBH 6 10 16 Ω 4

EXT/ Low On Resistance REXTBL 6 12 20 Ω 4

Integral Protection Time

(*4) tPRO (XC9220/9221 B series) ** ms 2

Short-Circuit Protection VSHORT - - 0.7 V 2

Soft-Start Time tSS Connected to RSS and CSS 5.0 10.0 20.0 ms 5

Internal Soft-Start Time (*1) tSS_IN CE=VIN ** ms 2

Efficiency (*2) EFFI - 92 - % 3

UVFB FB Voltage

Temperature Characteristics UToprVFB - +100 - ppm

/OC 2

CE “High” Level Voltage

(*3) VCEH 2.6 - - V 2

CE “Low” Level Voltage VCEL - - 0.3 V 2

CE “High” Level Current ICEH VIN=CE=16V - 0.1 - 0.1 μA 1

CE “Low” Level Current ICEL VIN=16V, CE=0V - 0.1 - 0.1 μA 1

FB “High” Level Current IFBH VIN=FB=16V - 0.1 - 0.1 μA 4

FB “Low” Level Current IFBL VIN=16V, FB=0V - 0.1 - 0.1 μA 4

XC9220/XC9221 B and D series

■ELECTRICAL CHARACTERISTICS (Continued)

Ta = 25 OC

■CHARACTERISTICS CHART BY OSCILLATION FREQUECY

6/22

XC9220

XC9221 Series

■TYPICAL APPLICATION CIRCUITS

● External Components

Pch MOSFET: 2SJ646 (SANYO)

SBD: DE5PC3 (SHINDENGEN)

L: CDRH8D28-4R7 (4.7μH, SUMIDA / fosc=1.0MHz)

CDRH8D43-100 (10μH, SUMIDA / fosc=500kHz)

CDRH127-220 (22μH, SUMIDA / fosc=300kHz)

CIN: 47μF (OS-CON, SANYO)

CL: 47μF (OS-CON, SANYO)

■OPERATIONAL EXPLANATION

The XC9220/XC9221 series consists of a reference voltage source, ramp wave circuit, error amplifier, PWM comparator,

phase compensation circuit, protection circuits, UVLO circuit and others. The series ICs compare, using the error

amplifier, the voltage of the internal voltage reference source with the feedback voltage from the VOUT pin through split

resistors. Phase compensation is performed on the resulting error amplifier output, to input a signal to the PWM

comparator to determine the turn-on time during PWM operation. The PWM comparator compares, in terms of voltage

level, the signal from the error amplifier with the ramp wave from the ramp wave circuit, and delivers the resulting output

to the buffer driver circuit to cause the EXT pin to output a switching duty cycle. This process is continuously performed

to ensure stable output voltage.

The reference voltage source provides the reference voltage to ensure stable output voltage of the DC/DC converter.

The oscillator determines switching frequency. The frequency is fixed internally and can be selected from 300kHz,

500kHz and 1.0MHz. Clock pulses generated in this circuit are used to produce ramp waveforms needed for PWM

operation, and to synchronize all the internal circuits.

The error amplifier is designed to monitor output voltage. The amplifier compares the reference voltage with the

feedback voltage (FB pin voltage) divided by the internal split resistors. When a voltage lower than the reference

voltage is fed back, the output voltage of the error amplifier increases. The gain and frequency characteristics of the

error amplifier output are fixed internally to deliver an optimized signal to the PWM comparator.

The XC9220 series is PWM control, and the XC9221 series is PWM/PFM automatic switching mode. In the XC9220

series, it is controlled at a constant frequency from light load to heavy load. When a noise etc. is concerned, it is easy

to set up a filter etc. since the frequency is fixed. On the other hand, the efficiency at the time of light load may fall.

In the XC9221 series, the high efficiency can be drawn from PFM control at the time of light load. In PWM/PFM

automatic switching mode, a control method is automatically changed from PWM control to PFM control at the time of

light load. If coil current becomes discontinuous at the time of light load, ON time duty intends to reduce less than

25%. Therefore, the PFM circuit operates to output the pulse, which ON time duty fixed to 25% from the EXT/pin. The

ON time duty is fixed when PFM operation. The pulse is outputted with the cycle suitable for the conditions at that

time. In order that the number of times of switching per unit time may decrease, the efficiency, which it is at the light

load time is improved. However, output cycle of the pulse cannot be fixed. For this, the circuit should be designed

with this point in mind when using a noise filter etc. The conditions shifting to the PFM operation is depend on values

of input voltage, load current, coil and so on.

7/22

XC9220/XC9221

Series

<Soft-Start Time>

The XC9220/XC9221B and D series can adjust the soft-start time externally via the CE pin. The soft-start function

operates until the CE pin voltage becomes 2.6V. Please refer to the following equation for calculating the soft-start

time. Minimum soft-start time is equal to the time set internally.

SS= - CSS x RSS x In { (VCE – 2.2) / VCE }

CE/CSS PIN

VCE

Rss

Css

CE/CSS

VCE

Rss

Css

ON/OFF

Signal

> Circuit Examle2 : CMOS logic (low current dissipation)

CE/CSS

VCE

Rss

Css

ON/OFF

Signal

> Cicuit Examle3 : CMOS logic (low current dissipation, quick off)> Circuit Example1 : N-ch Open Drain

CE/CSS

VCE

Rss

Css

ON/OFF

Signal

Internal

sotf-start time:Tss1

(XC9220/21A series)

Externally set

so ft-star t time: Tss2

(XC9220/21A series)

Minimum soft-start time

when externally set:

Tss2_min = Tss1

XC9220/21A series

XC9220/21B series

When the input voltage becomes 2.3V (TYP.) or lower, the external P-channel driver transistor is forced OFF. Once

the UVLO operates, the XC9220/XC9221A and C series (soft-start internally set type) resets the internal circuit. For

this, by releasing the UVLO function, the IC performs the soft-start function to initiate output startup operation. When

the input voltage falls because of a power cutoff etc. and the IC stops operation due to the UVLO function, the IC

resumes its operation by internal soft-start circuit of the XC9220/XC9221B and D series. If the soft-start time is

needed to set externally, the CE/CSS pin voltage should be reset to 0V. (Please see the soft-start circuit example.)

●UVLO Operation

VIN

U.V.L.O. (Internal Signal)

VOUT

(XC9220/21A and C series)

VOUT

(XC9220/21B and D series)

U.V .L.O.

release delay

Soft-start time: Tss1

U.V.L.O. operation

U.V .L.O.

release delay

Soft-start time (Externally set-up) :Tss2 Soft-start time:Tss1

■OPERATIONAL EXPLANATION

(

Continued

)

8/22

XC9220

XC9221 Series

2. Short-Circuit Protection Circuit (Latching Type)

When the FB pin is shorted to the Ground or the output voltage drops rapidly because of over load state etc., the P-ch

driver transistor is kept OFF as in the case with the integral protection circuit. (The protection circuit operates when

the FB voltage becomes 0.7V or lower.) For releasing the latching state, the circuit is needed to restart via the VIN or

the CE pin.

z Short-circuit protection circuit

FB Voltage 0.9V

0.7V

VREF

0.9V

Soft-start time ：Tss x 90%

* Protection circuit does not operate.

Less than 100usec = Not latching

Latch

100 usec

* About 100 to 200usec delay time is set

to avoid latching w hen instantaneous

transient response drop

1. Integral Protection Circuit (Latch Type)

In the circuit of the XC9220/XC9221 A and B series, the more load current becomes larger, the duty of the EXT/ pin

gradually expands, and the duty reaches maximum (EXT/L). When the MAXDUTY state continues a certain amount

of time (TPRO), the EXT/ pin holds high level (latching) and keeps the P-ch output driver transistor in OFF state. For

resuming the operation from the latching state, please turn off the IC via the CE pin or apply the input voltage again

(operates UVLO function and release). The latching state does not mean a complete shutdown, but a state in which

pulse output is suspended; therefore, the internal circuitry remains in operation.

However, the integral protection circuit uses the MAXDUTY as a trigger for its operation, it suspends the pulse output

no matter what dropout voltage decreases. For the specification including small dropout voltage, the

XC9220/XC9221 C or D series, which do not have the integral protection function, are recommended.

z Integral protection circuit

Ton < Tpro Ton > Tpro

EXT/ Waveform

Latch

Protection circuit operates and

EXT/ Output shut dow n

Ton : ON Time ( EXT/ : L)

Tpro : Integral Protection Circuit

Delay Time (Internally set)

■OPERATIONAL EXPLANATION

(

Continued

)

9/22

XC9220/XC9221

Series

● Output Voltage Setting

Output voltage can be set by adding split resistors. Output voltage is determined by the following equation, based on

the values of RFB1 and RFB2. The sum of RFB1 and RFB2 should normally be 1MΩ or less.

VOUT = 0.9 x (RFB1 + RFB2) / RFB2

The value of CFB, speed-up capacitor for phase compensation, should be adjusted by the following equation. Fzfb

should usually be 5kHz. Adjustments are required from 1kHz to 20kHz depending on the application, value of

inductance (L), and value of load capacity (CL).

CFB = 1 / (2 x

x RFB1 x fzfb)

[Sample calculation: Setting 3.3V VOUT]

RFB1 = 200k

, RFB2=75k

, VOUT = 0.9 x (200k + 75k) / 75k = 3.300V

FB = 1 / (2 x

x 200k x 5k) =150pF

[Typical examples]

VOUT

(V)

RFB1

(kΩ)

RFB2

(kΩ)

CFB

(pF)

VOUT

(V)

RFB1

(kΩ)

RFB2

(kΩ)

CFB

(pF)

1.2 100 300 330 3.3 200 75 150

1.5 180 270 180 5.0 150 33 220

1.8 220 220 150 12.0 160 13 180

IOUT UP TO 500mA UP TO 1A UP TO 2A UP TO 3A

P-ch MOSFET (*1) CPH3308

(SANYO)

2SJ616

(SANYO)

2SJ646

(SANYO)

Schottky Barrier Diode

(SBD) (*2)

XB01SB04A2BR

(TOREX)

D1FH3 (SHINDENGEN)

CMS02 (TOSHIBA)

DE5PC3

(SHINDENGEN)

*1: Recommended to use P-ch MOSFET with Ciss less than 1500pF.

*2: SBD should be used with high-toned reverse characteristics.

OUTPUT VOLTAGE RSENSE (mΩ)

VOUT≦2.5V 100

VOUT>2.5V 50

● Recommended MOSFET and SBD (Examples)

● Ceramic Capacitor

With the XC9220/9221 series, a ceramic capacitor can be used as an output capacitor (CL). RSENSE resistor

is required for using the ceramic capacitor. The value of RSENSE resistor is determined depending on the

setting output voltage as the chart below.

＜External Components＞

P-ch MOSFET: 2SJ646 (SANYO)

SBD: DE5PC3 (SHINDENGEN)

L: CDRH8D28-4R7 (4.7μH, SUMIDA / fosc=1.0MHz)

CDRH8D43-100 (10μH, SUMIDA / fosc=500kHz)

CDRH127-220 (22μH, SUMIDA / fosc=300kHz)

CIN: 22μF (ceramic)

CL: 22μF (ceramic / fosc=1.0MHz, 500kHz)

47μF (ceramic / fosc=300kHz)

RSENSE: 100mΩ (VOUT≦2.5V)

50mΩ (VOUT＞2.5V)

■OPERATIONAL EXPLANATION

(

Continued

)

10/22

XC9220

XC9221 Series

fosc (kHz) L (μH)

300 22.0

500 10.0

1000 4.7

■OPERATIONAL EXPLANATION

(

Continued

)

● Setting of Coil Value

Recommended inductance value of coil by oscillation frequency is shown in the chart below.

However, the more current change in each pulse becomes larger, the more output ripple voltage becomes

higher when dropout voltage is high. This may lead to instability. In this case, increasing the coil

inductance value will make Ipk_AC small, and it makes output stable.

Ipk_AC = (VIN – VOUT) x VOUT / (VIN x L x fosc)

L: Coil inductance value

fosc: Oscillation frequency

Please do not exceed the coil rating. Coil peak current is determined by the following equation.

Ipk = IOUT + Ipk_AC / 2

11/22

XC9220/XC9221

Series

■NOTES ON USE

1. The XC9220/XC9221 series are designed for use with an output ceramic capacitor. If, however, the potential

difference between input and output is too large, a ceramic capacitor may fail to absorb the resulting high switching

energy and oscillation could occur on the output. If the input-output potential difference is large, connect the output

capacitor with large performance to compensate for insufficient capacitance.

2. Spike noise and ripple voltage arise in a switching regulator as with a DC/DC converter. These are greatly influenced

by external component selection, such as the coil inductance, capacitance values, and board layout of the external

components. Once the design has been completed, verification with actual components should be done.

3. When the difference between input voltage and output voltage is large in PWM control, and the load current is light,

very narrow pulses will be outputted, and there is the possibility that some cycles my be skipped completely.

4. When the difference between input voltage and output voltage is small in PWM control, and the load current is heavy,

very wide pulses will be outputted and there is the possibility that some cycles my be skipped completely.

5. When using the CE pin by pulling up to the VIN pin, please be noted to the rising time of the VIN pin voltage. If the

rising time of the VIN pin voltage is much slower than the soft-start time of the XC9220/XC9221 series, the

short-protection circuit starts to operate so that the output may not rise. If you are using the A or the C series, please

use a voltage detector or something similar in order to check that the input voltage rises fully. Then, start the series via

the CE pin. If you don’t want to use an additional detector in this way, we recommend that you use the B or D series,

adjusting the soft-start period externally so that the voltage at the VIN pin rises fully before the soft-start period is

completed.

6. Use of the IC at voltages below the recommended minimum operating voltage may lead to instability.

7. This IC and external components should be used within the stated absolute maximum ratings in order to prevent

damage to the device.

8. For temporary, transitional voltage drop or voltage rising phenomenon, the IC is liable to malfunction should the ratings

be exceeded.

9. Torex places an importance on improving our products and their reliability.

We request that users incorporate fail-safe designs and post-aging protection treatment when using Torex products in

their systems.

12/22

XC9220

XC9221 Series

■ NOTES ON USE (Continued)

● Instructions on Pattern Layout

1. Wire external components as close to the IC as possible and use thick, short connecting traces to reduce the circuit

impedance.

2. Please pay special attention to the strengthening of VIN and VSS wiring. Switching noise which occurs from the GND

may cause the instability of the IC.

For that matter, it is recommended to connect RIN (about 10Ω) and CDD (about 1μF) to the VIN pin if VIN voltage is

high and noise is high.

[Board layout when XC9220/XC9221 series is mounted with external components]

[PC board for the XC9220/XC9221 series]

Ceramic Capacito

Schottky Barrier Diode

Inducto

Resisto

Low value resisto

13/22

XC9220/XC9221

Series

■TEST CIRCUITS

Circuit 1: Supply Current, Stand-by Current, CE Current Circuit 2: FB Voltage, Integral Protection, Short-Circuit,

Soft-Start, MAXDUTY, CE Voltage

Circuit 3: Oscillation Frequency, PFMDUTY, UVLO, Efficiency

Circuit 4: EXT On Resistance, FB Current Circuit 5: Soft-Start (Externally set: B and D series)

VSS

VIN

CE/CSS

EXT/

CIN:1uF

VSS

VIN

CE/CSS

EXT/

CIN:1uF

Probe

VSS

VIN

CE/CSS

EXT/

CIN:1uF

VSS

VIN

CE/CSS

EXT/

CIN:1uF

Probe

Rss

Css

14/22

XC9220

XC9221 Series

XC9220/21x095xx

100

0.1 1 10 100 1000 10000

Output Current: IOUT (mA)

Efficiency: EFFI (%

)

Tr:2SJ646, SBD:DE5PC3, CDRH127-10uH, C IN=10uF( ceramic) ,

CL= 44uF( ceramic) , RSENSE= 50moh

VIN=12V => VOUT=5

PWM(XC9220)

PFM(XC9221)

XC9220/21x095xx

100

0.1 1 10 100 1000 10000

Output Current: IOUT (mA)

Efficiency: EFFI (%

)

Tr:2SJ646, SBD:DE5PC3, CDRH127-10uH

CIN=10uF(ceramic) , CL=44uF( ceramic), RSEN SE=50moh

VOUT=3.3

VIN=5.0V

PWM(XC9220)

PFM(XC9221)

VIN=12V

XC9220/21x095xx

4.4

4.6

4.8

5.0

5.2

5.4

0.1 1 10 100 1000 10000

Output Current: IOUT (mA)

Output Voltage: VOUT (V)

Tr:2SJ646, SBD:DE5PC3, CDRH127-10uH

CIN=10uF(cer amic) , C L= 44uF(ceramic), R SENSE= 50moh

VIN=12V => VOUT=5

PWM(XC9220)

PFM

(

XC9221

)

XC9220/21x095xx

2.7

2.9

3.1

3.3

3.5

3.7

0.1 1 10 100 1000 10000

Output Current: IOUT (mA)

Output Voltage: VOUT (V)

Tr:2SJ646, SBD:DE5PC3, CDRH127-10uH

CIN=10uF(ceramic) , CL=44uF(ceramic) , RSEN SE=50moh

VOUT=3.3

VIN=5.0V

12V

PWM(XC9220)

PFM

(

XC9221

)

XC9220/21x095xx

100

0.1 1 10 100 1000 10000

Output Cur r ent: IOUT ( mA )

Ripple Voltage: Vr (mV)

Tr:2SJ646, SBD:DE5PC3, CDRH127-10uH

CIN=10uF(cer amic) , C L= 44uF(ceramic), R SENSE= 50moh

VIN=12V => VOUT=5

PWM(XC9220)

PFM(XC9221)

XC9220/21x095xx

100

0.1 1 10 100 1000 10000

Output Current: IOUT (mA)

Ripple Voltage: Vr (mV)

Tr:2SJ646, SBD:DE5PC3, CDRH127-10uH

CIN= 10uF(cer amic), CL=44uF(ceramic), R SENSE= 50moh

VOUT= 3.3

VIN=5.0V

PWM(XC9220)

PFM(XC9221)

VIN=12V

■TYPICAL PERFORMANCE CHARACTERISTICS

(1) Efficiency vs. Output Current

(2) Output Voltage vs. Output Current

(3) Output Ripple Voltage vs. Output Current

15/22

XC9220/XC9221

Series

XC9220/21 Series

0.75

0.80

0.85

0.90

0.95

1.00

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

FB Voltage: VFB (V)

VIN=5

XC9220 /2 1 Series

0.75

0.80

0.85

0.90

0.95

1.00

2 4 6 8 10 12 14 16

Input Voltage: VIN (V)

FB Voltage: VFB (V)

Ta=85℃

25℃

-40℃

XC9220 /2 1 Series

-50-250 255075100

Ambient Temperature: Ta (℃)

Supply Current: IDD (uA

)

VIN=5V, Fosc=300k,500kHz

XC9220 /2 1 Series

0246810121416

Input Voltage: VIN (V)

Supply Current: IDD (uA

)

Fosc= 300k,500kHz

Ta=85℃

25℃

-40℃

XC9220/21x095xx

400

425

450

475

500

525

550

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

VIN=5

XC9220/21Series

1.8

2.0

2.2

2.4

2.6

2.8

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

UVLO Voltage: VUVLO (V)

UVLO(Release)

UVLO(Detect)

Frequency: FOSC (kHz)

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(4) FB Voltage Temperature Characteristics

(6) Input Voltage Temperature Characteristics

(5) FB Voltage vs. Input Voltage

(7) Supply Current vs. Input Voltage

(8) Oscillation Frequency Temperature Characteristics (9) U.V.L.O. Temperature Characteristics

16/22

XC9220

XC9221 Series

XC9220 /2 1 Series

0 2 4 6 8 10121416

Input Voltage: VIN (V)

Ta=85℃

25℃

-40℃

XC9220/21Series

0246810121416

Input Voltage: VIN (V)

Ta=85℃

25℃

-40℃

EXT/L Resistance:REXTBL (Ω)

EXT/H Resistance:REXTBH (Ω)

XC9220/21 Series

2.0

3.0

4.0

5.0

6.0

7.0

8.0

-50-250 255075100

Ambient Temperature: Ta (℃)

Soft-Start Time: TSS (msec

)

VIN=5V, Fosc= 300k,500kHz

XC9220/21Series

1.0

1.5

2.0

2.5

3.0

3.5

4.0

-50-250 255075100

Ambient Temperature: Ta (℃)

Soft-Start Time : TSS (msec

)

VIN=5V, Fosc=1.0MHz

XC9220 /2 1A, B Series

0.0

0.4

0.8

1.2

1.6

2.0

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

VIN=5V, Fosc=300k,500kHz

XC9220 /2 1A, B Series

0.0

0.2

0.4

0.6

0.8

1.0

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

VIN=5V, Fosc= 1MHz

Integral Protection Time: Tpro (msec)

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(10) EXT H ON Resistance Characteristics (11) EXT L ON Resistance Characteristics

(11) Soft-Start Time Temperature Characteristics

(12) Integral Protection Time Temperature Characteristics

17/22

XC9220/XC9221

Series

XC9220 /2 1 Series

0.3

0.4

0.5

0.6

0.7

0.8

-50-250 255075100

Ambient Temperature: Ta (℃)

Short-Protection Voltage: Vshort (V)

VIN=5

XC9220 /2 1 Series

0.3

0.4

0.5

0.6

0.7

0.8

0246810121416

Input Voltage: VIN (V)

Short-Protection Voltage: Vshort (V)

XC9220 /2 1 Series

0.0

0.2

0.4

0.6

0.8

1.0

1.2

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

CE Voltage: VCEH, VCEL (V

)

VIN=5

CE_H

CE_L

XC9220 /2 1 Series

0.0

0.2

0.4

0.6

0.8

1.0

1.2

0246810121416

Input Voltage: VIN (V)

CE Voltage: VCEH, VCEL (V

)

CE_H

CE_L

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(13) Short-Circuit Protection Temperature Characteristics (14) Short-Circuit Protection Voltage vs.

Input Voltage

(15) CE Threshold Temperature Characteristics (16) CE Threshold vs. Input Voltage

18/22

XC9220

XC9221 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(17) Load Transient Response Characteristics

XC9220x095xx (500kHz, PWM Control)

Tr: 2SJ616 (SANYO), SBD: D1FH3 (SHINDENGEN), L=10μH CDRH8D43, SUMIDA)

IN=47μF (OS-Con), CL=47μF (OS-Con)

○IOUT=0.1mA→1000mA

VIN=5.0V, VOUT=3.3V, VOUT=100mV/div., Time=50μs/div. VIN=5.0V, VOUT=3.3V, VOUT=100mV/div., Time=10ms/div.

○IOUT=0.1mA→1000mA

VIN=10.0V, VOUT=3.3V, VOUT=100mV/div., Time=50μs /div. VIN=10.0V, VOUT=3.3V, VOUT=100mV/div., Time=10ms/div.

○IOUT=300mA→3000mA

19/22

XC9220/XC9221

Series

■PACKAGING INFORMATION

●SOT-25

●USP-6C

Unit : mm

20/22

XC9220

XC9221 Series

■PACKAGING INFORMATION (Continued)

●USP-6C Reference Pattern Layout ●USP-6C Reference Metal Mask Design

21/22

XC9220/XC9221

Series

USP-6C (TOP VIEW)

① represents product series

MARK PRODUCT SERIES

M XC9220xxxxxx

N XC9221xxxxxx

② represents product types

MARK FUNCTION PRODUCT SERIES

A Soft-start internally set with integral protection function XC922xAxxxxx

B Soft-start externally set with integral protection function XC922xBxxxxx

C Soft-start internally set without integral protection function XC922xCxxxxx

D Soft-start externally set without integral protection function XC922xDxxxxx

③ represents oscillation frequency

MARK OSCILLATION FREQUENCY PRODUCT SERIES

3 300kHz XC922xxxx3xx

5 500kHz XC922xxxx5xx

A 1.0MHz XC922xxxxAxx

① represents product series

MARK PRODUCT SERIES

1 XC9220xxxxxx

D XC9221xxxxxx

② represent product types

MARK FUNCTIONS PRODUCT SERIES

A Soft-start internally set with integral protection function XC922xAxxxxx

B Soft-start externally set with integral protection function XC922xBxxxxx

C Soft-start internally set without integral protection function XC922xCxxxxx

D Soft-start externally set without integral protection function XC922xDxxxxx

③④ represents FB voltage

MARK

③ ④ FB VOLTAGE PRODUCT SERIES

0 9 0.9V fixed XC922xx09xxx

⑤ represents oscillation frequency

MARK OSCILLATION FREQUENCY PRODUCT SERIES

3 300kHz XC922xxxx3xx

5 500kHz XC922xxxx5xx

A 1.0MHz XC922xxxxAxx

■ MARKING RULE

●SOT-25

④ represents production lot number

0 to 9, A to Z and inverted 0 to 9, A to Z repeated.

(G, I, J, O, Q, W excluded.)

●USP-6C

⑥ represents production lot number

0 to 9, A to Z repeated. (G, I, J, O, Q, W excluded.)

* No character inversion used.

SOT-25 (TOP VIEW)

22/22

XC9220

XC9221 Series

1. The products and product specifications contained herein are subject to change without

notice to improve performance characteristics. Consult us, or our representatives

before use, to confirm that the information in this datasheet is up to date.

2. We assume no responsibility for any infringement of patents, patent rights, or other

rights arising from the use of any information and circuitry in this datasheet.

3. Please ensure suitable shipping controls (including fail-safe designs and aging

protection) are in force for equipment employing products listed in this datasheet.

4. The products in this datasheet are not developed, designed, or approved for use with

such equipment whose failure of malfunction can be reasonably expected to directly

endanger the life of, or cause significant injury to, the user.

(e.g. Atomic energy; aerospace; transport; combustion and associated safety

equipment thereof.)

5. Please use the products listed in this datasheet within the specified ranges.

Should you wish to use the products under conditions exceeding the specifications,

please consult us or our representatives.

6. We assume no responsibility for damage or loss due to abnormal use.

prior permission of TOREX SEMICONDUCTOR LTD.