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SC4519H fiches techniques PDF

Semtech Corporation - 3A Step-Down Switching Regulator

Numéro de référence SC4519H
Description 3A Step-Down Switching Regulator
Fabricant Semtech Corporation 
Logo Semtech Corporation 





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SC4519H fiche technique
POWER MANAGEMENT
Description
The SC4519H is a current mode switching regulator with
an integrated switch, operating at 600kHz with separate
sync and enable functions. The integrated switch allows
for cost effective low power solutions (peak switch current
3 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.
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for fast dynamic
adjustment as
response
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.
SC4519H
600kHz, 3A Step-Down
Switching Regulator
Features
‹ Integrated 3 Amp switch
‹ 600kHz frequency of operation
‹ Current mode controller
‹ Synchronizable to higher frequency up to 1.2MHz
‹ Precision enable threshold
‹ SO-8 EDP package. Lead free product, fully WEEE
and RoHS compliant
Applications
‹ XDSL modems
‹ CPE equipment
‹ DC-DC point of load applications
‹ Portable equipment
The SC4519H is a 600kHz switching regulator
synchronizable to a faster frequency from 750kHz to
1.2MHz.
Typical Application Circuit
D1
VIN
Enable
C3
2 IN
5 EN
1
BST
SW 3
SC4519H
FB 6
8 SYNC
GND
4
COMP 7
C4
C1
L1
D2
R3
VOUT
R1
C2
R2
Revision: September 11, 2007
1
www.semtech.com

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