APW7062B データシートの表示（PDF） - Anpec Electronics

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APW7062B

Synchronous Buck PWM Controller

Anpec Electronics 

APW7062B

Features

• Simple Single-Loop Control Design

- Voltage-Mode PWM Control

• Fast Transient Response

- Full 0–100% Duty Ratio

• Excellent Output Voltage Regulation

- 0.8V Internal Reference

- ± 1% Over Line Voltage and Temperature

• Over Current Fault Monitor

- Uses Upper MOSFETs RDS (ON)

• Converter Can Source and Sink Current

• Small Converter Size

- 200kHz Free-Running Oscillator

- Programmable from 70kHz to 800kHz

• 14-Lead SOIC Package

• Lead Free Available (RoHS Compliant)

Applications

• Graphic Cards

• DDR Memory Power Supply

• DDR Memory Termination Voltage

• Low-Voltage Distributed Power Supplies

Synchronous Buck PWM Controller

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 RDS(ON), eliminating the need for a

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

RT 1

OCSET 2

SS 3

COMP

4

FB 5

EN 6

GND 7

14 VCC

13 PVCC

12 LGATE

11 PGND

10 BOOT

9 UGATE

8 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.

Copyright  ANPEC Electronics Corp.

1

Rev. A.3 - Mar., 2005

www.anpec.com.tw

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