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SC4612EVB

更新时间： 2024-11-26 04:05:23

品牌	Logo	应用领域
商升特 - SEMTECH		开关控制器
页数	文件大小	规格书
24页	426K
描述
Wide Input Range High Performance Synchronous Buck Switching Controller

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SC4612EVB 数据手册

SC4612

Wide Input Range High Performance

Synchronous Buck Switching Controller

POWER MANAGEMENT

Description

Features

SC4612 is a high performance synchronous buck controller

that can be configured for a wide range of applications.

The SC4612 utilizes synchronous rectified buck topology

where high efficiency is the primary consideration. SC4612

is optimized for applications requiring wide input supply

range and low output voltages down to 500mV.

Wide voltage range, V_DD= 28V, V_PWRIN= 40V

Internally regulated DRV

Output voltage as low as 0.5V

1.7A gate drive capability

Asynchronous start up mode

Low side R_DS-ONsensing with hiccup mode current

limit

Programmable current limit

Programmable frequency up to 1.2 MHz

Available in MLPD-12 and SOIC-14 Lead-free

packages. This product is fully WEEE and RoHS

compliant

SC4612 implements an asynchronous soft-start mode,

which keeps the lower side MOSFET off during soft-start, a

desired feature when a converter turns on into a preset

external voltage or pre-biased output voltage. With the lower

MOSFET off, the external bus is not discharged, preventing

any disturbances in the start up slope and any latch-up of

modern day ASIC circuits.

Applications

Distributed power architectures

Telecommunication equipment

Servers/work stations

Mixed signal applications

Base station power management

Point of use low voltage high current applications

SC4612 comes with a rich set of features such as regulated

DRV supply, programmable soft-start, high current gate

drivers, internal bootstrapping for driving high side

N-channel MOSFET, shoot through protection, R_DS-ONsensing

with hiccup over current protection, and asynchronous start

up with over current protection.

Typical Application Circuit

Vin

SC4612MLP

ILIM

OSC

SS/EN

EAO

PHASE

BST

DRV

C10

Vout

VDD

GND

Revision: January 31, 2007

www.semtech.com

12 3 4 5 6 7...24

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