AP2303

Document number: DS36546 Rev. 3 - 2

2 of 15

www.diodes.com

September 2014

© Diodes Incorporated

AP2303

A Product Line of

Diodes Incorporated

Pin Descriptions

Pin Number

Pin Name

Function

1

VIN

Unregulated input supply. A small 10µF MLCC should be connected from this pin to GND.

2

GND

Ground

3

VREFEN

Reference voltage input and active low shutdown control pin. Pulling the pin to ground turns off

device by BJT or FET. When it is released, a soft-start will take for about 0.1ms.

4

VOUT

Regulated voltage output. A minimum of 10µF ceramic capacitor to ground is required to assure

stability.

5, 7, 8

NC

No Connection

6

VCNTL

VCNTL supplies the internal control circuitry and provides the drive voltage.

–

Exposed Pad

The exposed pad should be connected to ground copper for better heat dissipation performance.

Functional Block Diagram

Enable

Thermal

Shutdown

Current Limit

Error

Amplifier

and

Soft Start

Power On

Reset

VCNTL

EN

VREF

OTSD

POR

VIN

VREFEN

VOUT

GND

6

3

1

4

2