AP2003

Synchronous PWM Controller

(Preliminary)

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. 0.1 Feb.10, 2004

1/6

Features

- Single or Dual Supply Application

- 0.8V + 1.0% Voltage Reference.

- Fast transient response.

- Synchronous operation for high efficiency (95%)

- Soft Start functions

- Small size with minimum external components

- Industrial temperature range

- Under Voltage Lockout function

- SOP-8L package

Applications

- Microprocessor core supply

- Low cost synchronous applications

- Voltage Regulator Modules (VRM)

- DDR termination supplies

- Networking power supplies

- Sequenced power supplies

General Description

The AP2003 is a low-cost, full featured, and

synchronous voltage-mode controller designed for

use in single ended power supply applications

where efficiency is of the primary concern.

This

synchronous operation allows the elimination of

heat sinks in many applications. The AP2003 is

ideal for implementing DC/DC converters needed to

power advanced microprocessors in low cost

systems, or in distributed power applications where

efficiency

is

important.

Internal

level-shift,

high-side drive circuitry, and preset shoot-thru

control, allows the use of inexpensive N-channel

power switches.

AP2003 features include temperature compensated

voltage reference, an internal 200KHz virtual

frequency

oscillator,

under-voltage

lockout

protection, soft-start, and shutdown function.

Pin Assignment

SOP-8L

1

2

3

45

6

7

8

(Top View)

VCC

GND

AP2003

DRVH

DRVL

BSTH

SENSE

SS/SHDN

COMP

Ordering Information

AP2003 X X X

Package

Packing

S: SOP-8L

Blank : Tube

A : Taping

Lead Free

Blank : Normal

L : Lead Free Package

Pin Descriptions

Name

Description

VCC

Chip supply voltage

DRVH

High side driver output

DRVL

Low side driver output

BSTH

Bootstrap, high side driver

SENSE

Voltage sense input

COMP

Compensation pin

Soft start, a capacitor to ground sets

the slow start time

GND

Ground