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參數(shù)資料
| 型號： | SC4517AEVB |
| 廠商： | Semtech Corporation |
| 英文描述： | 1.25MHz, 1.5A Step-Down Switching Regulator |
| 中文描述： | 1.25MHz的，1.5A的降壓型開關(guān)穩(wěn)壓器 |
| 文件頁數(shù)： | 1/15頁 |
| 文件大小： | 280K |
| 代理商： | SC4517AEVB |
POWER MANAGEMENT
Description
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).
1
www.semtech.com
SC4517A
1.25MHz, 1.5A Step-Down
Switching Regulator
Features
Typical Application Circuit
Applications
XDSL modems
CPE equipment
DC-DC point of load applications
Portable equipment
Revision: December 13, 2006
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
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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