Copyright

© ANPEC Electronics Corp.

Rev. A.2 - Oct., 2012

APW7165C

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.

5V to 12V Synchronous Buck Controller

Features

•

Wide Operation Supply Voltage from 5V to 12V

•

Power-On-Reset Monitoring on VCC

•

Excellent Reference Voltage Regulations

- 0.6V Internal Reference

- ±1% Over Temperature Range

•

Integrated Soft-Start

•

Automatic PSM/PWM Modes

•

Voltage Mode PWM Operation with 90% (Max.)

Duty Cycle

•

Under-Voltage Protection

•

Adjustable Over-Current Protection Threshold

- Sensing the R

•

Over-Voltage Protection

•

Under-Voltage Protection

•

Simple SOP-8P Package

•

Lead Free and Green Devices Available

(RoHS Compliant)

Applications

General Description

•

Graphic Cards

•

DSL, Switch HUB

•

Wireless Lan

•

Notebook Computer

•

Mother Board

•

LCD Monitor/TV

The APW7165Cis a voltage mode, fixed 300kHz-switch-

ing frequency, and synchronous buck controller. The

APW7165C allows wide input voltage that is either a

single 5~12V or two supply voltage(s) for various

applications. A power-on-reset (POR) circuit monitors the

VCC supply voltage to prevent wrong logic controls. A built-

in digital soft-start circuit prevents the output voltages from

overshoot as well as limits the input current. An internal

0.6V temperature-compensated reference voltage with

high accuracy is designed to meet the requirement of

low output voltage applications. The APW7165C provides

excellent output voltage regulations against load current

variation.

The controller’s over-current protection monitors the out-

put current by using the voltage drops across the R

DS(ON)

of low-side MOSFET, eliminating the need for a current

sensing resistor that features high efficiency and low cost.

The APW7165C also integrates over-voltage protection

(OVP) and under-voltage protection circuit which moni-

tors the FB voltage to prevent the PWM output from over

and under voltage.

The APW7165C is available in a simple SOP-8P package.

Pin Configuration

GND 3

UGATE 2

7 COMP

LGATE 4

6 FB

5 VCC

8 PHASE

BOOT 1

9

GND

SOP-8P

(Top View)

Simplified Application Circuit

PHASE

FB GND

VCC

LGATE

COMP

V

IN

V

OUT

UGATE

BOOT

5

7

6

3

4

8

2

1

ON

OFF

V

VCC

APW7165C