Copyright

 ANPEC Electronics Corp.

Rev. A.3 - Mar., 2005

APW7062B

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.

Synchronous Buck PWM Controller

- Voltage-Mode PWM Control

- Full 0–100% Duty Ratio

- 0.8V Internal Reference

-

- Uses Upper MOSFETs R

DS (ON)

- 200kHz Free-Running Oscillator

- Programmable from 70kHz to 800kHz

Features

Applications

General Description

The APW7062B is a voltage mode, synchronous PWM

controller which drives dual N-Channel MOSFETs. It

integrates the control, monitoring and protection func-

tions into a single package, provides one controlled

power outputs with under-voltage and over-current

protection.

APW7062B provide excellent regulation for output load

variation. An internal 0.8V temperature-compensated

reference voltage is designed to meet the requirement

of low output voltage applications. It includes a 200kHz

free-running triangle-wave oscillator that is adjustable

from 70kHz to 800kHz.

The power-on-reset (POR) circuit monitors the VCC,

EN, OCSET input voltage to start-up or shutdown the

IC. The over-current protection (OCP) monitors the

output current by using the voltage drop across the

upper MOSFET’s R

current sensing resistor. The under-voltage protection

(UVP) monitors the voltage of FB pin for short-circuit

protection.

The over-current protection trip cycle the soft-start func-

tion until the fault events be removed. Under-voltage

protection will shutdown the IC directly.

Pinouts

1

2

3

4

5

6

7

10

9

8

11

12

13

14

RT

OCSET

SS

COMP

FB

EN

GND

VCC

PVCC

LGATE

PGND

BOOT

UGATE

PHASE