SC4611

更新时间： 2024-11-26 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
11页	251K
描述
Wide Input Range High Performance Synchronous Buck Switching Regulator

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SC4611 数据手册

SC4611

Wide Input Range High Performance

Synchronous Buck Switching Regulator

POWER MANAGEMENT

Description

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

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.

Small package TSSOP-20

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.

Applications

Distributed power architectures

Telecommunication equipment

Servers/work stations

Mixed signal applications

Paralleled synchronous buck convertors

Base station power management

Typical Application Circuit

VIN (30V MAX)

Cin

VOUT (0.5V MIN)

Lout

Rcs

Cout

VIN

BST

GDH

BDI

AVCC

PVCC

SS/SH

OSC

SYNC

CLM

EAO

Rclset

GDL

CS+

CS-

OVP

RTN

AGND

PGND

POK

RTN

Revision: November 10, 2004

www.semtech.com

12 3 4 5 6 7...11

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与SC4611相关器件

型号	品牌	获取价格	描述	数据表
SC4611ITSTRT	SEMTECH	获取价格	Wide Input Range High Performance Synchronous Buck Switching Regulator
SC4612	SEMTECH	获取价格	Wide Input Range High Performance Synchronous Buck Switching Controller
SC4612BMLTRT	SEMTECH	获取价格	Switching Controller, Voltage-mode, 1.7A, 1200kHz Switching Freq-Max, ROHS COMPLIANT, MLPD
SC4612BSTRT	SEMTECH	获取价格	Switching Controller, Voltage-mode, 1.7A, 1200kHz Switching Freq-Max, PDSO14, ROHS COMPLIA
SC4612EVB	SEMTECH	获取价格	Wide Input Range High Performance Synchronous Buck Switching Controller
SC4612H	SEMTECH	获取价格	40V Synchronous Buck Controller
SC4612H_09	SEMTECH	获取价格	40V Synchronous Buck Controller
SC4612HEVB	SEMTECH	获取价格	40V Synchronous Buck Controller
SC4612HMLTRT	SEMTECH	获取价格	40V Synchronous Buck Controller
SC4612HSTRT	SEMTECH	获取价格	40V Synchronous Buck Controller

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