SC4520SETRT

Manufacturer Part NumberSC4520SETRT
DescriptionIC,SMPS CONTROLLER,CURRENT-MODE,SOP,8PIN,PLASTIC
ManufacturerSemtech
SC4520SETRT datasheet
 


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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.
Typical Application Circuit
V
IN
Enable
C3
Rosc
Revision: December 13, 2006
3A Step-Down Switching Regulator with
Adjustable Switching Frequency
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
C1
1
BST
2
3
IN
SW
5
6
SC4520
EN
FB
8
7
FSET
COMP
GND
4
C4
R3
1
SC4520
D1
L1
V
OUT
R1
C2
D2
R2
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