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

±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,

±2% PRECISION

POWER MANAGEMENT

- PROGRAMMABLE POWER-UP TIME

- POWER GOOD OUTPUT, SKIP MODE

- OUTPUT OVERVOLTAGE PROTECTION

- OUTPUT UNDERVOLTAGE LOCKOUT

OPERATING FREQUENCY UP TO 1MHz

Application

ADVANCED MICROPROCESSOR SUPPLIES

POWER SUPPLYFOR PENTIUM

®

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

µs.The high precision internal refer-

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

July 1999

®

FREQ SETTING

SYNC

POWER

MANAGEMENT

& SYSTEM

SUPERVISOR

4.75V

to

25V

POWER

SECTION

L5996

POWER GOOD

PWM SECTIONS

DAC

NOSKIP

ENABLE

CPU CORE

2.5V LIN. REG.

3.3V

2.5V

CPU CLK

D0

D1

D2

D3

0.925V to 2.0V

Mobile

D98IN997A

D4

TYPICAL APPLICATION CIRCUIT

TQFP32

(7mm x 7mm)

L5996

5 BIT DYNAMIC DAC CONTROLLER FOR MOBILE CPU

PRELIMINARY DATA

1/9