SC1175CSW.TR datasheet(1/23 Pages) SEMTECH

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POWER MANAGEMENT

1

www.semtech.com

SC1175

Low Power Dual Synchronous DC/DC

Controller With Current Sharing Circuitry

Description

Features

Applications

Revision: September 22, 2004

The SC1175 is a versatile 2 phase, synchronous, volt-

age mode PWM controller that may be used in two dis-

tinct ways. First, the SC1175 is ideal for applications

where point of use output power exceeds any single in-

put power budget. Alternatively, the SC1175 can be used

as a dual switcher. The SC1175 features a temperature

compensated voltage reference, over current protection

with 50% fold-back and internal level-shifted, high-side

drive circuitry.

In current sharing configuration, the SC1175 can pro-

duce a single output voltage from two separate voltage

sources (which can be different voltage levels) while

maintaining current sharing between the channels. Cur-

rent sharing is programmable to allow loading each input

supply as required by the application.

In dual switcher configuration, two feedback paths are

provided for independent control of the separate out-

puts. The device will provide a regulated output from

flexibly configured inputs (3.3V, 5V, 12V), provided 5V is

present for V

CC. The two switchers are 180° out of phase

to minimize input and output ripple.

300kHz fixed frequency operation

Soft Start and Enable function

Power Good output provided

Over current protection with 50% fold-back

Phase-shifted switchers minimize ripple

High efficiency operation, >90%

Programmable output(s) as low as 1.25V

Industrial temperature range

20 pin SOIC or TSSOP package

Two Phase, Current Sharing Controller

Flexible, same or separate V

IN

Programmable current sharing

Combined current limit with fold-back

2 phases operating opposed for ripple reduction

Thermal distribution via multi-phase output

Two Independent PWM Controllers

Flexible, same or separate V

IN

Independent control for each channel

Independent and separate current limit

2 phases operating opposed for ripple reduction (if

same V

IN used)

Graphics cards

DDR Memory

Peripheral add-in card

SSTL Termination

Dual-Phase power supply

Power supplies requiring two outputs

Số phần tương tự - SC1175CSW.TR

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Semtech Corporation	SC1175CSW.TR	348Kb / 20P	Low Power Dual Synchronous DC/DC Controller With Current Sharing Circuitry

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nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Semtech Corporation	SC1175	348Kb / 20P	Low Power Dual Synchronous DC/DC Controller With Current Sharing Circuitry
Anpec Electronics Corop...	APW1175	247Kb / 10P	DUAL SYNCHRONOUS DC/DC CONTROLLER WITH CURRENT SHARING CONTROL
International Rectifier	IRU3046	163Kb / 20P	DUAL SYNCHRONOUS PWM CONTROLLER WITH CURRENT SHARING CIRCUITRY AND LDO CONTROLLER
International Rectifier	IRU3047	141Kb / 19P	DUAL SYNCHRONOUS PWM CONTROLLER WITH CURRENT SHARING CIRCUITRY AND LDO CONTROLLER
Semtech Corporation	SC2677	163Kb / 9P	Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry
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	SC2677B	547Kb / 19P	Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry
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Silicon Standard Corp.	SS9175	210Kb / 12P	Dual Synchronous DC/DC Controllers With Current Sharing Circuitry
Semtech Corporation	SC2677B	382Kb / 19P	Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry

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