AP131

300mA Low Dropout Linear Regulator with Shutdown

This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of

this product. No rights under any patent accompany the sale of the product.

Rev. 1.2 Oct 28, 2004

1/7

Features

- Input voltage range is up to 7V

- Dropout voltage 400mV at 300mA output current

- Guaranteed 300mA output current.

- Low quiescent current 50

- Output voltage 2% accuracy, and 1.5V to 5V with

0.1V step

- Active low shutdown function (EN pin).

- Fast transient response

- Good load regulation

- Current limit and thermal shutdown protection

- SOT89-5L and SOT23-5L packages

Applications

- Wireless Communication

- Battery Powered device

- CD-ROM, DVD, and LAN Card

- PC peripheral

General Descriptions

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

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 application, for example, some battery

powered devices. The typical quiescent current is

approximately 50µA from zero to maximum load.

Due to internal flexible design, result in extensively

fixed output voltage versions and make 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.

Pin Assignments

(Top View)

SOT23-5L

3

2

5

4

1

IN

GND

EN

BP

OUT

SOT89-5L

(Top View)

3

2

1

5

4

IN

GND

EN

BP

OUT

Pin Descriptions

Name

Description

IN

Input voltage

GND

Ground

EN

Enable pin

BP

Bandgap

OUT

Output voltage