SC4520 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SC4520' PDF : 12 Pages View PDF
SC4520
3A Step-Down Switching Regulator with
Adjustable Switching Frequency
POWER MANAGEMENT
Description
The SC4520 is a current mode switching regulator with
an integrated switch and an adjustable frequency with
enable function. The integrated switch allows for cost-
effective, low power solutions with a peak switch current
of 3 amps. An adjustable high frequency of 100kHz to
600kHz provides for fast dynamic response and
instantaneous duty cycle adjustment as the input varies,
making the device ideal for CPE applications where the
input is a wall plug power. Low shutdown current also
makes the this device an excellent choice for portable
applications where conserving battery life is of prime
concern.
Features
Wide operating voltage range: 4.4V to 24V
Integrated 3 Amp switch
100kHz to 600kHz adjustable frequency operation
Current mode control
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
Digtial consumer electronics
Typical Application Circuit
D1
VIN
Enable
C3
2
IN
1
BST
3
SW
5
EN
SC4520
6
FB
8
FSET
Rosc
GND
4
7
COMP
C4
R3
C1
L1
D2
VOUT
R1
C2
R2
Revision: December 13, 2006
1
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