L5996 Datasheet, PDF (1/9 Pages) STMicroelectronics – 5 BIT DYNAMIC DAC CONTROLLER FOR MOBILE CPU

®
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 ±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
MEETS INTEL MOBILE PENTIU^® III
TQFP32
(7mm x 7mm)
Application
ADVANCED MICROPROCESSOR SUPPLIES
POWERSUPPLYFOR 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 100µs.The high precision internal refer-
TYPICAL APPLICATION CIRCUIT
4.75V
to
25V
L5996
PWM SECTIONS
FREQ SETTING
SYNC
DAC
NOSKIP
3.3V
POWER
MANAGEMENT
& SYSTEM
SUPERVISOR
2.5V LIN. REG.
POWER
SECTION
V_O
0.925V to 2.0V
D0
D1
D2
D3
D4
POWER GOOD
ENABLE
2.5V
D98IN997A
CPU CORE
Pentium^® III
Mobile
CPU CLK
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.