APW7061 查看數據表（PDF） - Anpec Electronics

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APW7061

Synchronous Buck PWM Controller

Anpec Electronics 

APW7061

Features

• Fast Transient Response

- 0~85% Duty Ratio

• Excellent Output Voltage Regulation

- 0.8V Internal Reference

- ±1% Over Line Voltage and Temperature

• Internal Soft-Start

- Typical 2mS

• Over Current Protection

- Sense Low-side MOSFET’s RDS(ON)

• Under Voltage Lockout

• Small Converter Size

- 250kHz Free-running Oscillator

• 8-lead SOIC Package

• Lead Free Available (RoHS Compliant)

Applications

• Graphic Cards

• Memory Power Supplies

• DSL or Cable MODEMs

• Set Top Boxes

• Low-Voltage Distributed Power Supplies

Synchronous Buck PWM Controller

General Description

The APW7061 is a voltage mode, synchronous PWM

cont roller which drives dual N-c hannel MOSFETs . It

integrates t he c ont rols, monitoring and protec tion

funct ions into a single package, which provides one

c ontrolled power output s wit h under-voltage and

over-current protections.

APW7061 provides excellent regulation for output load

variation. An internal 0.8V temperature-compensated

reference voltage is designed to meet the various low

output voltage applications.

A power-on-reset (POR) circuit limits the VCC minimum

opearting s upply voltage to ass ure the c ontroller

working well. Over current protec tion is achieved by

monit oring t he volt age drop ac ros s the low s ide

MOSFET, eliminating the need for a current sensing

resistor and short circuit condition is detected through

the FB pin. The over-current protection triggers the

soft -start function until the fault events be removed,

but Under-voltage protection will shutdown IC directly.

Pull the COMP pin below 0.4V will shutdown t he

controller, and both gate drive signals will be low.

Pinouts

VCC 1

FB 2

COMP 3

GND 4

8 LGATE

7 BOOT

6 UGATE

5 PHASE

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.

C opyright © ANPEC Electronics C orp.

1

Rev. A.7 - Nov., 2005

www.anpec.com.tw

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