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參數資料
| 型號： | SC4611 |
| 廠商： | Semtech Corporation |
| 英文描述： | Wide Input Range High Performance Synchronous Buck Switching Regulator |
| 中文描述： | 寬輸入范圍高性能同步降壓開關穩壓器 |
| 文件頁數： | 1/11頁 |
| 文件大小： | 260K |
| 代理商： | SC4611 |
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www.semtech.com
SC4611
Wide Input Range High Performance
Synchronous Buck Switching Regulator
POWER MANAGEMENT
Description
SC4611 is a high performance synchronous buck controller
that can be configured for a wide range of applications.
The SC4611 utilizes synchronous rectified buck topologies
where high efficiency is the primary consideration. It is
optimized for applications involving multiple and redundant
convertors connected together. The startup is
asynchronous, which keeps the lower side FET off during
soft start. This is a desired feature when a convertor is
turned on with a preset external voltage or pre-bias voltage
already present across its output. With the lower FET off,
external bus is not discharged which avoids latch-up of
modern ASIC circuits.
Revision: November 10, 2004
Features
Wide input range, 4.5 to 30V
Output voltage as low as 0.5V
2A output drive capability
Asynchronous start up mode
Multimode overcurrent protection with current limit,
hiccup mode and latched shutdown
Overvoltage crowbar protection
Power OK signal
Programmable frequency up to 1 MHz with external
synchronization
–40 to +85 degree C operating temperature
Thermal shutdown
Small package TSSOP-20
Applications
Distributed power architectures
Telecommunication equipment
Servers/work stations
Mixed signal applications
Paralleled synchronous buck convertors
Base station power management
Typical Application Circuit
SC4611 comes with a rich set of features like regulated
Vcc supply, soft start, power-good signaling, high current
gate drivers, bootstrapped supply for driving high side N-
channel MOSFETs, shoot through protection, frequency
synchronization and the option for overvoltage crowbar. It
also features multi mode overload protection that includes
continuous current limiting, hiccup mode followed by latch
off. The user has the option of bypassing the hiccup mode
and latch off the output if required.
Cin
Cout
Rcs
Rclset
RT
QH
QL
Lout
S
VIN
4
AVCC
17
PVCC
20
PGND
18
GDL
19
PH
1
GDH
2
BST
3
AGND
15
EAO
9
FB
8
SS/SH
14
SYNC
16
OSC
13
OVP
11
BDI
5
POK
10
CS+
7
CS-
6
CLM
12
VIN (30V MAX)
VOUT (0.5V MIN)
RTN
RTN
相關PDF資料 |
PDF描述 |
|---|---|
| SC4611ITSTRT | Wide Input Range High Performance Synchronous Buck Switching Regulator |
| SC4612 | Wide Input Range High Performance Synchronous Buck Switching Controller |
| SC4612EVB | Wide Input Range High Performance Synchronous Buck Switching Controller |
| SC4612MLTRT | Wide Input Range High Performance Synchronous Buck Switching Controller |
| SC4612STRT | Wide Input Range High Performance Synchronous Buck Switching Controller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SC4611ITSTRT | 制造商:Semtech Corporation 功能描述: 制造商:Semtech Corporation 功能描述:Controller IC |
| SC4612 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Wide Input Range High Performance Synchronous Buck Switching Controller |
| SC4612EVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Wide Input Range High Performance Synchronous Buck Switching Controller |
| SC4612H | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:40V Synchronous Buck Controller |
| SC4612H_09 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:40V Synchronous Buck Controller |
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