sc1163 Semtech Corporation, sc1163 Datasheet

sc1163

Manufacturer Part Number

sc1163

Description

Converter With Low Dropout Regulator Controller

Manufacturer

Semtech Corporation

Datasheet

1.SC1163.pdf (12 pages)

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Company:

Bonase Electronics (HK) Co., Limited

Part Number:

sc1163CS

Manufacturer:

SEMTECH

Quantity:

117

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Download datasheet (262Kb)

October 25, 1999

DESCRIPTION

The SC1162/3 combines a synchronous voltage mode

controller with a low-dropout linear regulator providing

most of the circuitry necessary to implement two DC/

DC converters for powering advanced microprocessors

such as Pentium

The SC1162/3 switching section features an integrated

5 bit D/A converter, pulse by pulse current limiting,

integrated power good signaling, and logic compatible

shutdown. The SC1162/3 switching section operates at

a fixed frequency of 200kHz, providing an optimum

compromise between size, efficiency and cost in the

intended application areas. The integrated D/A con-

verter provides programmability of output voltage from

2.0V to 3.5V in 100mV increments and 1.30V to 2.05V

in 50mV increments with no external components.

The SC1162/3 linear section is a high performance

positive voltage regulator design for either the GTL bus

supply at 1.5V (SC1162) or an adjustable output

(SC1163).

The output of the linear regulator can provide up to 5A

or more with the appropriate external MOSFET.

PIN CONFIGURATION

(24 Pin SOIC)

Top View

II.

BLOCK DIAGRAM

TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com

PROGRAMMABLE SYNCHRONOUS DC/DC

CONVERTER WITH LOW DROPOUT

REGULATOR CONTROLLER

PWRGOOD

VOSENSE

VID4

VID3

VID2

VID1

VID0

OVP

VCC

OPEN

COLLECTORS

1.25 REF

SHUT-

D/A &

DOWN

LOGIC

FEATURES

APPLICATIONS

ORDERING INFORMATION

Part Number

SC1162CSW

SC1163CSW

Note:

(1) Add suffix ‘TR’ for tape and reel.

VCC

652 MITCHELL ROAD NEWBURY PARK CA 91320

AGND

Synchronous design, enables no heatsink solution

95% efficiency (switching section)

5 bit DAC for output programmability

On chip power good function

Designed for Intel Pentium

1.5V or Adj. @ 1% for linear section

1.300V-2.05V ±1.5%; 2.100V-3.500V ±2%

Pentium

Flexible motherboards

1.3V to 3.5V microprocessor supplies

Programmable dual power supplies

CS-

70mV

CS+

OSCILLATOR

AMP

ERROR

1.265V

REF

LDOV

CURRENT LIMIT

(1)

ll or Deschutes microprocessor supplies

Pentium is a registered trademark of Intel Corporation

Package

SO-24

CONTROLLER

FET

Voltage

Linear

1.5V

II requirements

Adj.

GATE

MOSFET DRIVER

SYNCHRONOUS

AND HIGH SIDE

MOSFET DRIVE

LEVEL SHIFT

CONTROL

LDOS

SHOOT-

THRU

SC1162/3

0° t o 125°C

Range (T

Temp.

BSTH

PGNDH

BSTL

PGNDL

)

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