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參數資料
| 型號： | SC4521 |
| 廠商： | Semtech Corporation |
| 英文描述： | 3A Step-Down Switching Regulator with Programmable Soft Start |
| 中文描述： | 第3A降壓型開關穩壓器具有可編程軟啟動 |
| 文件頁數： | 1/18頁 |
| 文件大小： | 332K |
| 代理商： | SC4521 |
POWER MANAGEMENT
Description
1
www.semtech.com
SC4521
3A Step-Down Switching Regulator
with Programmable Soft Start
Features
Revision: October 5, 2007
The SC4521 is a current mode switching regulator with
an integrated switch, operating at 600kHz with
programmable soft start and enable functions. The
integrated switch allows for cost effective low power
solutions (peak switch current 3 amps). High frequency
operation allows for very small passive components.
Current mode operation allows for fast dynamic response
and instantaneous duty cycle adjustment as 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.
The SC4521 is an 600kHz switching regulator with a low
pin count.
The SC4521 allows customers to use large capacitive
loads because its programmable soft start limits the dv/
dt of the output at start up.
Wide operating voltage range: 4.4V to 24V
Integrated 3 Amp switch
600kHz frequency of operation
Programmable soft start funchion
Current mode control
Precision enable threshold
SO-8 EDP Lead-free package, fully WEEE and RoHS
compliant
Applications
XDSL modems
CPE equipment
DC-DC point of load applications
Portable equipment
Digtial consumer electronics
C1
V
OUT
D2
R3
D1
L1
C2
BST
1
IN
2
SW
3
GND
4
EN
5
FB
6
COMP
7
SS
8
Enable
C4
V
IN
C3
R2
R1
SC4521
C6
Typical Application Circuit
相關PDF資料 |
PDF描述 |
|---|---|
| SC4521EVB | 3A Step-Down Switching Regulator with Programmable Soft Start |
| SC4521SETRT | 3A Step-Down Switching Regulator with Programmable Soft Start |
| SC4524A | 28V 2A Step-Down Switching Regulator |
| SC4524AEVB | 28V 2A Step-Down Switching Regulator |
| SC4524ASETRT | 28V 2A Step-Down Switching Regulator |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SC4521EVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:3A Step-Down Switching Regulator with Programmable Soft Start |
| SC4521EVB-1 | 制造商:Semtech Corporation 功能描述:EVALUATION BOARD 制造商:Semtech Corporation 功能描述:3A Step-Down Switching Regulator With Programmable Soft Start |
| SC4521EVB-2 | 制造商:Semtech Corporation 功能描述:EVALUATION BOARD 制造商:Semtech Corporation 功能描述:3A Step-Down Switching Regulator With Programmable Soft Start |
| SC4521EVB-3 | 制造商:Semtech Corporation 功能描述:EVALUATION BOARD 制造商:Semtech Corporation 功能描述:3A Step-Down Switching Regulator With Programmable Soft Start |
| SC4521EVB-4 | 制造商:Semtech Corporation 功能描述:EVALUATION BOARD |
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