2.5A SWITCH STEP DOWN SWITCHING REGULATOR

Copyright

© ANPEC Electronics Corp.

Rev. A.4 - Aug., 2005

APW1172

www.anpec.com.tw

1

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise

customers to obtain the latest version of relevant information to verify before placing orders.

Pin Description

Features

LCD monitors

Optical Storage, Hard Disk Drive

Converters

APW1172 - adjustable from 1.235V to 20V

Applications

The APW1172 is a step down monolithic power

switching regulator with a switching current limit of

3.8A so it is able to deliver more than 2.5A DC current

to the load depending on the application conditions.

The output voltage can be set from 1.235V to 22V.The

high current level is also achieved utilize an SO8

package with exposed pad frame. The type of package

allows to re-duce the Rth (j-amb) down to approximately

45

An internal oscillator fixes the switching frequency at

250KHz.

Having a minimum input voltage of 4.8V only, it is

particularly suitable for 5V bus, available in all computer

related applications.

Pulse by pulse current limit with the internal frequency

modulation offers an effective constant current short

circuit protection.

General Description

= Thermal Pad

(connected to GND plane for better heat

dissipation)

SOP-8-P (Top View)

1

2

3

4

8

7

6

5

VCC

GND

VREF

FB

OUT

SYNC

INH

COMP