AP131-35WG-7 - DIODES Incorporated

AP131

300mA LOW DROPOUT LINEAR REGULATOR WITH

SHUTDOWN

AP131 Rev. 7 1 of 7 FEBRUARY 2009

www.diodes.com © Diodes Incorporated

Lead-free

• Input Voltage Range is from 2.7 to 5.5V

• Dropout Voltage 400mV at 300mA Output Current

• Guaranteed 300mA Output Current

• Internal Ron = 1.5Ω PMOS draws no Base Current

• Low Quiescent Current 50µA

• Output Voltage: 1.5V/1.8V/2.0V/2.5V/2.8V/

• 2.9V/3.0V/3.3V/ 3.5V; Accuracy 2%

• Active Lo w Shutd own Funct ion (EN pin)

• Fast Transient Response

• Good Load Regulation

• Current Limit and Thermal Shutdown Protection

• Short Circuit Current Fold-Back

• Lead Free package: SOT25

• SOT25: Available in “Green” Molding Compound

(No Br, Sb)

• Lead Free Finish/RoHS Compliant (Note 1)

The AP131 is a 300mA, fixed output voltage, low dropout linear

regulator. The Device included pass element, error amplifier,

band-gap, current limit and thermal shutdown circuitry. The

device is ON when the EN pin is set to logic high level.

The characteristics of low dropout voltage and less quiescent

current make it good for some critical current applications, for

example, some battery powered devices. The typical quiescent

current is approximately 50µA from zero to maximum load. Due

to the internal flexible design, it results in extensively fixed output

voltage versions and makes it convenient to use for applications.

Built-in current-limit and thermal-shutdown functions prevent any

fault condition from IC damage. An external capacitor can be

connected to the BP pin and reduce the output noise.

Applications

• Battery Powered Device

• Wireless Communication

• CD-ROM, DVD, and LAN Card

• PC Peripheral

Ordering Information

Output Voltage Package Packing

W : SOT25

Lead Free

G : Green

7 : Tape & Reel

L : Lead Free

AP131 - XX W X - 7

15 :1.5V

18 :1.8V

20 :2.0V

25 :2.5V

28 :2.8V

29 :2.9V

30 :3.0V

33 :3.3V

35 :3.5V

Device Package

Code Packaging

(Note 2) 7” Tape and Reel

Quantity Part Number Suffix

AP131-XXWL-7 W SOT25

3000/Tape & Reel -7

AP131-XXWG-7 W SOT25

3000/Tape & Reel -7

Notes: 1. EU Directive 2002/95/ EC ( RoHS). All applicable RoHS exemptions applied. Please visit our website at

http://www.diodes.com/products/lead_free.html.

2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

http://www.diodes.com/datasheets/ap02001.pdf.

Features General Description

AP131

300mA LOW DROPOUT LINEAR REGULATOR WITH

SHUTDOWN

AP131 Rev. 7 2 of 7 FEBRUARY 2009

www.diodes.com © Diodes Incorporated

Pin Assignment

( Top View )

SOT25

3

2

5

4

1IN

EN BP

OUT

Pin Description

Block Diagram

Current

Limit

Thermal

Shutdown

-

+

IN OUT

GND

1.08V

E rro r

Amp

Bandgap

Enable

BP

EN

Pin Name Description

IN Input Voltage

GND Ground

EN Enable Pin

BP Band-gap

OUT Output Voltage

AP131

300mA LOW DROPOUT LINEAR REGULATOR WITH

SHUTDOWN

AP131 Rev. 7 3 of 7 FEBRUARY 2009

www.diodes.com © Diodes Incorporated

Absolute Maximum Ratings

Symbol Parameter Rating Unit

VCC Input Voltage +6 V

TOP Operating Junction Temperature Range -40 to +125 ºC

TST Storage Temperature Range -65 to +150 ºC

PD Power Dissipation, PD @ TA = 25ºC SOT25 250 mW

Recommended Operating Conditions

Symbol Parameter Min Max Unit

VIN Input Voltage 2.7 5.5 V

IOUT Output Current 0 300 mA

TA Operating Ambient Temperature -40 85 °C

AP131

300mA LOW DROPOUT LINEAR REGULATOR WITH

SHUTDOWN

AP131 Rev. 7 4 of 7 FEBRUARY 2009

www.diodes.com © Diodes Incorporated

Electrical Characteristics

TA = 25ºC, CIN = 1µF, COUT = 10µF, unless otherwise specified.

Symbol Parameter Conditions Min Typ. Max Unit

VDROP Dropout Voltage (Note 3) IL = 300mA - 400 500 mV

ILIMIT Current Limit (Note 4) VIN = 5V , VOUT = 0V 350 450 - mA

Ishort Short Circuit Current VOUT < 1.05V - 150 300 mA

ΔVLINE Line Regulation IOUT=1mA, VIN =( VOUT +1V )

to 5.5V - 0.1 0.3 %/V

ΔVLOAD Load Regulation (Note 5) IL = 1~300mA, VIN = 5V - 30 35 mV

ΔVOUT Output Voltage Accuracy IL = 1mA, VIN = 5V -2 - +2 %

Output Voltage Temperature

Coefficient (Note 6) - 50 150

PPM/

ºC

PSRR Ripple Rejection F = 100Hz,

CIN = 1μF, CO = 10uF,

IL = 100mA - 60 - dB

ISB Standby Current IL = 0mA, VIN = 5V, EN = 0V - - 5 μA

IQ Quiescent Current IL = 0mA, VIN = 5V, EN = 5V - 50 100 μA

IEN Enabl e Pin Current - - < 0.1 μA

VENON Enable Pin Voltage Output ON 1.5 - VIN V

VENOFF Output OFF 0 - 0.8 V

TDELAY Enable Delay Time CBP = 0.1μF, COUT = 1μF,

IOUT = 30mA - 8 - μS

θJA Thermal Resistance

Junction-to-Ambient SOT25 (Note 7) 163 OC/W

θJC Thermal Resistance

Junction-to-Case SOT25 (Note 7) 53 OC/W

Notes: 3. Dropout voltage is defined as the input to output differential voltage. Dropout is measured at constant junction temperature by using pulsed ON

time, and the criterion is VOUT inside target value ±2%. This test is skipped at the condition of VIN<3V.

4. Current limit is measured at constant junction temperature by using pulsed testing with a low ON time.

5. Regulati on is measured at constant junction temperatur e by using pulsed testing with a low ON time.

6. Guaranteed by design.

7. Test conditions for SOT25: Device mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout.

AP131

300mA LOW DROPOUT LINEAR REGULATOR WITH

SHUTDOWN

AP131 Rev. 7 5 of 7 FEBRUARY 2009

www.diodes.com © Diodes Incorporated

Typical Characteristics

AP131 PSRR vs. Frequency

0

5

10

15

20

25

30

35

40

45

50

55

60

65

70

10 100 1K 10K 100K 1M

Fre

q

uenc

y

(

Hz

)

PSRR (dB)

AP131 Vout vs. Load Current

3.02

3.025

3.03

3.035

3.04

3.045

3.05

3.055

3.06

3.065

3.07

3.075

3.08

3.085

3.09

3.095

0 30 60 90 120 150 180 210 240 270 300 330

Load Current

(

uA

)

Vout

AP131 GND Current vs. Input Voltage

0

5

10

15

20

25

30

35

40

45

50

55

00.511.522.533.544.555.56

Input Voltage (V)

GND Current (uA)

AP131 Dropout vs. Load

0

50

100

150

200

250

300

350

400

450

0 50 100 150 200 250 300

Load (Io) (mA)

Dropout (V)

V

OUT

=3.3V

Typical Application Circuit

IN OUT

GND

AP131

BP

EN

VIN CIN

CBP

COUT

VOUT

ON

OFF

1uF

0.1uF 10uF

AP131

300mA LOW DROPOUT LINEAR REGULATOR WITH

SHUTDOWN

AP131 Rev. 7 6 of 7 FEBRUARY 2009

Marking Information

(1) SOT25

1 2 3

5

7

4

XX YW X

XX : Identification code

W : Week : A~Z : 1~26 week;

X : a~z : Lead Free

( Top View )

Y : Year 0~9

a~z : 27~52 week; z represents

52 and 53 week

A~Z : Green

Part Number Package Identification Code

AP131-15W SOT25 DA

AP131-18W SOT25 DD

AP131-20W SOT25 DF

AP131-25W SOT25 DK

AP131-28W SOT25 DN

AP131-29W SOT25 DO

AP131-30W SOT25 DP

AP131-33W SOT25 DS

AP131-35W SOT25 DU

Package Information (All Dimensions in mm)

AP131

300mA LOW DROPOUT LINEAR REGULATOR WITH

SHUTDOWN

AP131 Rev. 7 7 of 7 FEBRUARY 2009

IMPORTANT NOTICE

LIFE SU PPOR T

Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further

notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither

does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will

agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages.

Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the

President of Diodes Incorporated.