SC4517AEVB datasheet(1/15 Pages) SEMTECH

Il numero della parte	SC4517AEVB

Spiegazioni elettronici	1.25MHz, 1.5A Step-Down Switching Regulator

PDF	15 Pages

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Produttore elettronici	SEMTECH [Semtech Corporation]

Homepage	http://www.semtech.com

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SC4517A

1.25MHz, 1.5A Step-Down

Switching Regulator

Description

Features

Typical Application Circuit

Applications

Revision: December 13, 2006

The SC4517A is a current mode switching regulator with

an integrated switch, operating at 1.25MHz with separate

sync & enable functions. The integrated switch allows

for cost effective low power solutions (peak switch current

1.5 amps). The sync function allows customers to

synchronize to a faster clock in order to avoid frequency

beating in noise sensitive applications. High frequency

of operation allows for very small passive components.

Current mode operation allows for fast dynamic response

& instantaneous duty cycle adjustment as the input varies

(ideal for CPE applications where the input is a wall plug

power).

The low shutdown current makes it ideal for portable

applications where battery life is important.

The SC4517A is a 1.25MHz switching regulator

synchronizable to a faster frequency from 1.6MHz to

2MHz.

Integrated 1.5 Amp switch

1.25MHz frequency of operation

Current mode controller

Synchronizable to higher frequency up to 2MHz

6µA low shutdown current

MSOP-8 and MLPD-8 Lead-free packages. This

product is fully WEEE and RoHS compliant

XDSL modems

CPE equipment

DC-DC point of load applications

Portable equipment

C1

VOUT

D2

D1

R3

C2

L1

Enable

BST

1

IN

2

SW

3

GND

4

EN

5

FB

6

COMP

7

SYNC

8

VIN

C4

C3

SC4517AXX

R1

R2

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