APW7104 Просмотр технического описания (PDF) - Anpec Electronics

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APW7104

1.5MHz, 1A Synchronous Buck Regulator

Anpec Electronics 

APW7104

Pin Description

PIN

NO.

NAME

1

RUN

2

GND

3

SW

4

VIN

5

FB

FUNCTION

Enable Control Input. Forcing this pin above 1.0V enables the device. Forcing this pin below 0.4V shuts it

down. In shutdown, all functions are disabled to decrease the supply current below 0.5µA. Do not leave

RUN pin floating.

Power and Signal Ground.

Switch Node Connected to Inductor. This pin connects to the drains of the internal main and synchronous

power MOSFETs switches.

Device and Converter Supply Pin. Must be closely decoupled to GND with a 4.7µF or greater ceramic

capacitor.

Feedback Input Pin. The buck regulator senses feedback voltage via FB and regulates the FB voltage at

0.6V. Connecting FB with a resistor-divider from the output sets the output voltage of the buck converter.

Block Diagram

RUN

Shutdown

Control

Over-

Temperature

Protection

Slope

Compensation

Oscillator

Current

Sense

Amplifier

Logic Control

Current

-Limit

∑

Gate

Driver

Zero-

Crossing

Comparator

ICMP

COMP

Error

Amplifier

EAMP

Soft-

Start

VREF

0.6V

VIN

SW

GND

FB

Copyright © ANPEC Electronics Corp.

6

Rev. A.6 - Mar., 2012

www.anpec.com.tw

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