SC1176ASW Semtech Corporation, SC1176ASW Datasheet

SC1176ASW

Manufacturer Part Number

SC1176ASW

Description

Manufacturer

Semtech Corporation

Datasheet

1.SC1176ASW.pdf (22 pages)

Specifications of SC1176ASW

Case

SOP20

Date_code

06+

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

SC1176ASW/SC1176

Manufacturer:

HAMAMATSU

Quantity:

100

Current page: 1 of 22
Download datasheet (382Kb)

The SC1176 is a versatile 2 phase, synchronous, volt-

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

tinct ways. First, the SC1176 is ideal for applications

where point of use output power exceeds any single in-

put power budget. Alternatively, the SC1176 can be used

as a dual switcher. The SC1176 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 SC1176 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.

The SC1176A has the phases of the Master and the Slave

inverted.

It offers a different pattern for ripple cancellation and

prevents phase fold back during current limit.

The two chips are pin compatible.

Revision 3, June 2003

POWER MANAGEMENT

Description

. The two switchers are 180° out of phase

Controller with Current Sharing Circuitry

Two Phase, Current Sharing Controller

Two Independent PWM Controllers

Features

Applications

Dual Synchronous Voltage Mode

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 .9V

Industrial temperature range

SOIC-20 or TSSOP-20 pin package

Flexible, same or separate V

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

used)

SC1176/SC1176A

www.semtech.com

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