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SC4520EVB PDF预览

SC4520EVB

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
页数 文件大小 规格书
12页 269K
描述
3A Step-Down Switching Regulator with Adjustable Switching Frequency

SC4520EVB 数据手册

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SC4520  
3A Step-Down Switching Regulator with  
Adjustable Switching Frequency  
POWER MANAGEMENT  
Features  
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.  
‹ 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  
C1  
1
L1  
BST  
2
3
6
7
VIN  
VOUT  
IN  
SW  
FB  
5
8
Enable  
EN  
SC4520  
R1  
C2  
C3  
FSET  
COMP  
D2  
GND  
4
R2  
Rosc  
C4  
R3  
Revision: December 13, 2006  
1
www.semtech.com  

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