APW7062BKC-TRG Ver la hoja de datos (PDF) - Anpec Electronics

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APW7062BKC-TRG

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 R

DS (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 and Green Devices 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 and synchronous PWM

controller which drives dual N-Channel MOSFETs. It inte-

grates the control, monitoring, and protection functions

into a single package, provides one controlled power

outputs with under-voltage and over-current protection.

APW7062B provides 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,

and 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 , eliminating the need for a current sens-

DS(ON)

ing resistor. The under-voltage protection (UVP) moni-

tors the voltage of the 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 pro-

tection will shutdown the IC directly.

Pin Configuration

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.4 - Oct., 2008

www.anpec.com.tw

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