L5994_02 Datasheet, PDF (1/26 Pages) STMicroelectronics – ADJUSTABLE TRIPLE OUTPUT POWER SUPPLY CONTROLLER

L5994
L5994A
ADJUSTABLE TRIPLE OUTPUT
POWER SUPPLY CONTROLLER
FEATURE
s DUAL PWM CONTROLLERS ADJUSTABLE
1.9V to 5.3V(Section1)
1.6V to 3.5V(Section2)
s AUXILIARY DRIVER FOR LINEAR
REGULATOR
s CURRENT MODE CONTROL USING A LOW
SENSE RESISTOR
s DUAL SYNC RECTIFIERS DRIVERS
s "ONE SHOT" FEATURE (L5994A only)
s 96% EFFICIENCY ACHIEVABLE
s 50µA@12V STAND BY CONSUMPTION
s 4.75V TO 25V OPERATING SUPPLY VOLTAGE
s EXCELLENT LOAD TRANSIENT RESPONSE
s "PULSE SKIPPING" FUNCTION
s OUTPUT UNDER VOLTAGE SHUTDOWN
s ADAPTATIVE ANTI SHOOT-THROUGH
CONTROL
s OVER/UNDER VOLTAGE DETECTION
s POWER GOOD SIGNALS
s SEPARATED DISABLE
s THERMAL SHUTDOWN
Figure 1. System Block Diagram
TQFP32
ORDERING NUMBERS: L5994
L5994A
APPLICATIONS
s NOTEBOOK AND SUB NOTEBOOK
COMPUTERS
s 1.8V AND 2.5V I/O SUPPLY
s WORDPAD
s INTERNET APPLIANCE
DESCRIPTION
The device provides a dual PWM controller and a
linear driver controller that can support the complete
power management in mobile equipment with high
efficiency.
5V
to
25V
SYNC
L5994
D98IN862
POWER
MANAGEMENT
& SYSTEM
SUPERVISOR
POWER
SECTION
2.5V
1.8V
12V LDO
5.1V LDO
3.39V REF
POWER GOOD
µP
MEMORY
PERIPHERALS
April 2002
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