L6911 datasheet(1/7 Pages) STMICROELECTRONICS

Il numero della parte	L6911

Spiegazioni elettronici	5 BIT PROGRAMMABLE POWER SUPPLY CONTROLLER FOR PENTIUM II PROCESSOR

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

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OPERATING SUPPLY VOLTAGE FROM 5V

TO 12V

TTL-COMPATIBLE 5BIT PROGRAMMABLE

OUTPUT FROM:

-1.3V TO 2.05V WITH 0.05V BINARY STEPS

-2.1V TO 3.5V WITH 0.1V BINARY STEPS

VOLTAGE MODE PWM CONTROL

EXCELLENT OUTPUT ACCURACY +/-1%

OVERLINE, AND TEMPERATURE VARIATIONS

HIGH PRECISION INTERNAL REFERENCE

DIGITALLY TRIMMED

VERY FAST LOAD TRANSIENT 0% TO 100%

DUTY CYCLE

POWER GOOD OUTPUT

OVERVOLTAGE PROTECTION

OVERCURRENT PROTECTION REALISED

USING THE MOSFET’s RDSon

OPERATING FREQUENCY FROM 50KHz TO

1MHz

MEETS INTEL PENTIUM II SPECIFICATION

DISABLE FUNCTION

Applications

POWER SUPPLY FOR ADVANCED MICRO-

PROCESSOR SUPPLIES

POWER SUPPLY FOR PENTIUM II INTEL

PROCESSORS

DESCRIPTION

The L6911B is a power supply controller specifi-

cally designed to provide a high performance

DC/DC conversion for Pentium II Microproces-

sors. A precise 5 bit digital to analog converter

April 1999

®

10

PGND

PHASE

GND

VFB

LGATE

BOOT

UGATE

VCC

OCSET

11

16

17

13

14

15

V

CC

5V/12V

18

2

Vin 5V/12V

Vo

1.3V to 3.5V

4

5

6

7

8

1

PGOOD

12

19

3

20

VD0

VD1

VD2

VD3

VD4

COMP

VSEN

SS

OVP

OSC

9

D98IN956B

APPLICATION CIRCUIT

SO20

L6911B

5 BIT PROGRAMMABLE POWER SUPPLY

CONTROLLER FOR PENTIUM II PROCESSOR

1/7

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