AP2007

Synchronous PWM Controller

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. 1.0 Apr 1, 2005

1/7

Features

- Single 4.5V to 20V Supply Application

- 0.8V + 2.0% Voltage Reference

- Virtual Frequency Control

TM

- Fast Transient Response

- Synchronous Operation for High Efficiency (93%)

- Short Circuit Protect

- Small Size with Minimum External Components

- Soft Start and Enable Functions

- Under Voltage Lockout Function

- SOP-8L Pb-Free Package

Applications

- Microprocessor Core Supply

- Low Cost Synchronous Applications

- Voltage Regulator Modules (VRM)

- Networking Power Supplies

- Sequenced Power Supplies

- Telecommunication Power Supplies.

General Description

The AP2007 is a low-cost, full featured, synchronous

voltage-mode controller designed for use in single

ended power supply applications where efficiency is

of primary concern. Synchronous operation allows

for the elimination of heat sinks in many applications.

The AP2007 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.

High-side drive circuitry, and preset shoot-thru

control,

allows

the

use

of

inexpensive

1P+1N-channel power switches.

AP2007’s

features

include

temperature

Control

TM

method to reduce external component count,

an internal 200KHz virtual frequency oscillator,

under-voltage

lockout

protection,

soft-start,

shutdown function and current sense comparator

circuitry.

Virtual Frequency Control is a trademark of

PWRTEK, LLC.

Pin Assignments

SOP-8L

1

(Top View)

VCC

V

REF

PHASE

DRVP

DRVN

FB

GND

AP2007

2

3

4

5

6

7

8

SS/SHDN

Ordering Information

AP2007 X X

Package

Packing

S: SOP-8L

Blank : Tube

A : Taping

Pin Descriptions

Name

Description

VCC

Chip supply voltage

Reference voltage

PHASE

Input from the phase node between

the MOSFETs

DRVP

High side driver output (P MOSFET)

GND

Ground

DRVN

Low side driver output (N MOSFET)

FB

Feedback input

SS/ SHDN

Soft start, a capacitor to ground sets

the slow start time / Shutdown

function