L6996 datasheet(1/26 Pages) STMICROELECTRONICS

部件名	L6996

功能描述	DINAMICALLY PROGRAMMABLE SYNCHRONOUS STEP DOWN CONTROLLER FOR MOBILE CPUs

PDF	26 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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L6996

July 2002

s

5 BIT DAC WITH AVAILABLE EXTERNAL

OUTPUT VOLTAGE.

s

0.6 TO 1.750V, DYNAMICALLY ADJUSTABLE

OUTPUT VOLTAGE RANGE.

s

±1% OUTPUT ACCURACY OVER LINE AND LOAD.

s

ACTIVE DROOP.

s

CONSTANT ON TIME TOPOLOGY ALLOWS

LOW DUTY CYCLE AND FAST LOAD

TRANSIENT.

s

90% EFFICIENCY FROM 12V TO 1.35V/8A.

s

1.750V TO 28V BATTERY INPUT RANGE.

s

OPERATING FREQUENCY UP TO 1MHZ.

s

INTEGRATED HIGH CURRENT DRIVERS.

s

LATCHED OVP AND UVP PROTECTIONS.

OCP PROTECTION.

s

350

µA TYP. QUIESCENT CURRENT.

s

7

µA TYP. SHUTDOWN SUPPLY CURRENT.

s

PGOOD AND OVP SIGNALS.

s

ZERO-CURRENT DETECTION AND PULSE-

FREQUENCY MODE.

APPLICATIONS

s

ADVANCED MOBILE CPUs SUPPLY WITH

DYNAMIC TRANSITIONS.

s

NOTEBOOK/LAPTOP, CONCEPT PC CPUs

SUPPLY.

s

DC/DC FROM BATTERY SUPPLY EQUIPMENTS.

DESCRIPTION

The device is dc-dc controller specifically designed to

provide extremely high efficiency conversion for mo-

bile advanced microprocessors.

The "constant on-time" topology assures fast load

transient response. The embedded "voltage feedfor-

ward" provides nearly constant switching frequency

operation.

A precise 5-bit DAC allows select output voltage from

0.6V to 1V with 25mV steps and from 1V to 1.75V

with 50mV steps.

L6996 is capable of supporting CPUs VID combina-

tion changing during normal operation.

The active droop allows adjust both the output load-

line slope and the zero-load output voltage.

TSSOP24

ORDERING NUMBERS: L6996D (TSSOP24)

L6996DTR (Tape & Reel)

DINAMICALLY PROGRAMMABLE SYNCHRONOUS

STEP DOWN CONTROLLER FOR MOBILE CPUs

APPLICATION DIAGRAM

SENSE

R

VPROG

C

SS

C

SHDN

1.25V

5V

25V

PGOOD

OVP

5V

VPROG

VFB+

VFB-

VID4:0

L

V

OUT

HS

LS

DS

L6996

CS-

PGND

LGATE

CS+

GND

PHASE

HGATE

ILIM

BOOT

OSC

SS

类似零件编号 - L6996

制造商	部件名	数据表	功能描述
STMicroelectronics	L6995	336Kb / 25P	STEP DOWN CONTROLLER FOR HIGH DIFFERENTIAL INPUT-OUTPUT CONVERSION Dec-2002
	L6995D	336Kb / 25P	STEP DOWN CONTROLLER FOR HIGH DIFFERENTIAL INPUT-OUTPUT CONVERSION Dec-2002
	L6995DTR	336Kb / 25P	STEP DOWN CONTROLLER FOR HIGH DIFFERENTIAL INPUT-OUTPUT CONVERSION Dec-2002
	L6995S	478Kb / 26P	LOSSLESS CURRENT LIMIT Apr-2004
	L6995STR	478Kb / 26P	LOSSLESS CURRENT LIMIT Apr-2004

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