Diodes AP131-15W, AP131-18W, AP131-20W, AP131-25W, AP131-28W Schematic [ru]

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 Low Shutdown Function (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 dr opout 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

Error

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

V

CC

Input Voltage +6 V

T

OP

Operating Junction Temperature Range -40 to +125 ºC

T

ST

Storage Temperature Range -65 to +150 ºC

P

D

Power Dissipation, P

D

@ T

A

= 25ºC SOT25 250 mW

Recommended Operating Conditions

Symbol Parameter Min Max Unit

V

IN

Input Voltage 2.7 5.5 V

I

OUT

Output Current 0 300 mA

T

A

Operating Ambient Temperature -40 85

°C