L5994 datasheet(1/26 Pages) STMICROELECTRONICS

Numer części	L5994

Szczegółowy opis	ADJUSTABLE TRIPLE OUTPUT POWER SUPPLY CONTROLLER

PDF	26 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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L5994

L5994A

April 2002

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

50

µA@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

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.

TQFP32

ORDERING NUMBERS: L5994

L5994A

ADJUSTABLE TRIPLE OUTPUT

POWER SUPPLY CONTROLLER

Figure 1. System Block Diagram

SYNC

POWER

MANAGEMENT

& SYSTEM

SUPERVISOR

5V

to

25V

2.5V

1.8V

POWER

SECTION

L5994

µP

MEMORY

PERIPHERALS

12V LDO

5.1V LDO

3.39V REF

D98IN862

POWER GOOD

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