DFR0205 datasheet(1/9 Pages) ETC

Part #	DFR0205

Description	5A 350KHz 25V Buck DC to DC Converter

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Manufacturer	ETC [List of Unclassifed Manufacturers]

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Datasheet

5A 350KHz 25V Buck DC to DC Converter

1

Features

Wide 3.6V to 25V Input Voltage Range

Output Adjustable from 0.8V to 23V

Maximum Duty Cycle 100%

Minimum Drop Out 0.6V

Fixed 350KHz Switching Frequency

5A Constant Output Current Capability

Internal Optimize Power MOSFET

High efficiency

Excellent line and load regulation

TTL shutdown capability

EN pin with hysteresis function

Built in thermal shutdown function

Built in current limit function

Built in output short protection function

Available in TO-263 package

Applications

LCD Monitor and LCD TV

Digital Photo Frame

Set-up Box

ADSL Modem

Telecom / Networking Equipment

General Description

The GS2678 is a 350 KHz fixed frequency

PWM buck (step-down) DC/DC converter,

capable of driving a 5A load with high

efficiency, low ripple and excellent line and

load regulation. Requiring a minimum

number of external components, the regulator

is simple to use and include internal

frequency

compensation

and

a

fixed-frequency oscillator.

The PWM control circuit is able to adjust the

duty ratio linearly from 0 to 100%. An enable

function, an over current protection function

is built inside. When short protection function

happens, the operation frequency will be

reduced from 350KHz to 80KHz. An internal

compensation block is built in to minimize

external component count.

Figure1. Package Type of GS2678

SHENZHEN GSM ELECTAONIC CO.,LTD http://www.086ic.cn

tel:0755-81275006 mob:13424297678

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