SC1175CSW.TRT Semtech Corporation, SC1175CSW.TRT Datasheet

SC1175CSW.TRT

Manufacturer Part Number

SC1175CSW.TRT

Description

SO-28/Low-Power Dual Synchronous DC/DC Controller

Manufacturer

Semtech Corporation

Datasheet

1.SC1175CSW.TRT.pdf (23 pages)

Specifications of SC1175CSW.TRT

Pack_quantity

1000

Comm_code

85423990

Lead_time

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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

to minimize input and output ripple.

Revision: September 22, 2004

POWER MANAGEMENT

Description

. The two switchers are 180° out of phase

Controller With Current Sharing Circuitry

Low Power Dual Synchronous DC/DC

Two Phase, Current Sharing Controller

Two Independent PWM Controllers

Features

Applications

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

Programmable current sharing

Combined current limit with fold-back

2 phases operating opposed for ripple reduction

Thermal distribution via multi-phase output

Flexible, same or separate V

Independent control for each channel

Independent and separate current limit

2 phases operating opposed for ripple reduction (if

same V

Graphics cards

DDR Memory

Peripheral add-in card

SSTL Termination

Dual-Phase power supply

Power supplies requiring two outputs

Flexible, same or separate V

used)

www.semtech.com

SC1175

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