SC4521

更新时间： 2024-11-19 04:05:23

品牌	Logo	应用领域
商升特 - SEMTECH		稳压器开关软启动
页数	文件大小	规格书
18页	323K
描述
3A Step-Down Switching Regulator with Programmable Soft Start

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SC4521 数据手册

SC4521

3A Step-Down Switching Regulator

with Programmable Soft Start

POWER MANAGEMENT

Description

Features

The SC4521 is a current mode switching regulator with

an integrated switch, operating at 600kHz with

programmable soft start and enable functions. The

integrated switch allows for cost effective low power

solutions (peak switch current 3 amps). High frequency

operation allows for very small passive components.

Current mode operation allows for fast dynamic response

and instantaneous duty cycle adjustment as the input

varies (ideal for CPE applications where the input is a

wall plug power).

Wide operating voltage range: 4.4V to 24V

Integrated 3 Amp switch

600kHz frequency of operation

Programmable soft start funchion

Current mode control

Precision enable threshold

SO-8 EDP Lead-free package, fully WEEE and RoHS

compliant

Applications

XDSL modems

CPE equipment

The low shutdown current makes it ideal for portable

applications where battery life is important.

DC-DC point of load applications

Portable equipment

Digtial consumer electronics

The SC4521 is an 600kHz switching regulator with a low

pin count.

The SC4521 allows customers to use large capacitive

loads because its programmable soft start limits the dv/

dt of the output at start up.

Typical Application Circuit

BST

V_IN

V_OUT

Enable

SC4521

COMP

GND

Revision: October 5, 2007

www.semtech.com

12 3 4 5 6 7...18

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