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廬

L5996

5 BIT DYNAMIC DAC CONTROLLER FOR MOBILE CPU

PRELIMINARY DATA

DYNAMIC DAC DETECTION ON CHIP

PROGRAMMABLE OUTPUT FROM 0.925V

TO 2.0V WITH 0.05V AND 0.025V BINARY

STEPS

ULTRA HIGH EFFICIENCY

SEPARATE 5V BIAS SUPPLY AVAILABLE

FOR HIGH EFFICIENCY PERFORMANCE

EXCELLENT OUTPUT ACCURACY

鹵1%

OVER LINE, LOAD AND TEMPERATURE

VARIATIONS

HIGH PRECISION INTERNAL REFERENCE

DIGITALLY TRIMMED

OPERATING SUPPLY

VOLTAGE FROM

4.75V TO 25V

VERY FAST LOAD TRANSIENT

REMOTE SENSING INPUTS

INTERNAL LINEAR REGULATOR 2.5V

/150mA,

鹵2%

PRECISION

POWER MANAGEMENT

- PROGRAMMABLE POWER-UP TIME

- POWER GOOD OUTPUT, SKIP MODE

- OUTPUT OVERVOLTAGE PROTECTION

- OUTPUT UNDERVOLTAGE LOCKOUT

OPERATING FREQUENCY UP TO 1MHz

MEETS INTEL MOBILE PENTIU

廬

III

TQFP32

(7mm x 7mm)

Application

ADVANCED MICROPROCESSOR SUPPLIES

POWERSUPPLYFOR PENTIUM

廬

III INTEL MO-

BILE

DESCRIPTION

The L5996 is a power supply controller that offers

a complete power management for notebook

CPUs of the next generation especially for mobile

Pentium III. A high precise 5 bit digital to analog

converter (DAC) allows to adjust the output volt-

age from 0.925V to 2.0V. Dynamic DAC code

changes are detected on chip in order to switch

the output voltage between 1.3V and 1.45V in

less tahn 100碌s.The high precision internal refer-

TYPICAL APPLICATION CIRCUIT

L5996

POWER

SECTION

4.75V

to

25V

PWM SECTIONS

V

O

0.925V to 2.0V

D0

D1

FREQ SETTING

SYNC

DAC

D2

D3

D4

CPU CORE

Pentium

廬

III

Mobile

NOSKIP

POWER

MANAGEMENT

& SYSTEM

SUPERVISOR

2.5V LIN. REG.

POWER GOOD

ENABLE

CPU CLK

3.3V

2.5V

D98IN997A

July 1999

1/9

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

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