L6919ETR datasheet(1/33 Pages) STMICROELECTRONICS

部件名	L6919ETR

功能描述	5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MANAGEMENT

PDF	33 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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L6919E

September 2003

s

2 PHASE OPERATION WITH

SYNCRHONOUS RECTIFIER CONTROL

s

ULTRA FAST LOAD TRANSIENT RESPONSE

s

INTEGRATED HIGH CURRENT GATE

DRIVERS: UP TO 2A GATE CURRENT

s

TTL-COMPATIBLE 5 BIT PROGRAMMABLE

OUTPUT FROM 0.800V TO 1.550V WITH

25mV STEPS

s

DYNAMIC VID MANAGEMENT

s

0.6% OUTPUT VOLTAGE ACCURACY

s

10% ACTIVE CURRENT SHARING ACCURACY

s

DIGITAL 2048 STEP SOFT-START

s

OVERVOLTAGE PROTECTION

s

OVERCURRENT PROTECTION REALIZED

USING THE LOWER MOSFET'S RdsON OR A

SENSE RESISTOR

s

OSCILLATOR EXTERNALLY ADJUSTABLE

AND INTERNALLY FIXED AT 200kHz

s

POWER GOOD OUTPUT AND INHIBIT

FUNCTION

s

REMOTE SENSE BUFFER

s

PACKAGE: SO-28

APPLICATIONS

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POWER SUPPLY FOR SERVERS AND

WORKSTATIONS

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POWER SUPPLY FOR HIGH CURRENT

MICROPROCESSORS

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DISTRIBUTED POWER SUPPLY

DESCRIPTION

The device is a power supply controller specifically

designed to provide a high performance DC/DC

conversion for high current microprocessors. The

device implements a dual-phase step-down con-

troller with a 180° phase-shift between each

phase. A precise 5-bit digital to analog converter

(DAC) allows adjusting the output voltage from

0.800V to 1.550V with 25mV binary steps manag-

ing On-The-Fly VID code changes.

The high precision internal reference assures the

selected output voltage to be within ±0.6%. The

high peak current gate drive affords to have fast

switching to the external power mos providing low

switching losses.

The device assures a fast protection against load

over current and load over/under voltage. An inter-

nal crowbar is provided turning on the low side

mosfet if an over-voltage is detected. In case of

over-current, the system works in Constant Cur-

rent mode.

SO-28

ORDERING NUMBERS:L6919E

L6919ETR

5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER

WITH DYNAMIC VID MANAGEMENT

BLOCK DIAGRAM

CUR REN T

REA D IN G

I

FB

TO TAL

CUR REN T

CH1

OC P

DA C

DIGIT AL

SOFT- START

CH1 OCP

PW M1

ERR OR

AMPL IF IER

REMO TE

BU FFE R

32k

LS

HS

Vc c

HS

BOO T 1

U

GA T E1

PHAS E1

LGAT E1

ISE N1

PGN DS1

PGN D

PGN DS2

ISE N2

LGAT E2

PHAS E2

UGAT E2

BOO T 2

Vc c

COM P

FB

VS EN

FB G

FB R

VID 0

VID 1

VID 2

VID 3

VID 4

PGOOD

OS C / I NH

S GN D

VCCD R

32k

VCC DR

VCC

CH 2 OC P

PW M2

CH2

OC P

CUR REN T

REA D IN G

CUR REN T

REA D IN G

CUR REN T

REA D IN G

I

FB

TO TAL

CUR REN T

CH1

OC P

DA C

DIGIT AL

SOFT- START

CH1 OCP

PW M1

ERR OR

AMPL IF IER

REMO TE

BU FFE R

32k

LS

HS

Vc c

HS

BOO T 1

U

GA T E1

PHAS E1

LGAT E1

ISE N1

PGN DS1

PGN D

PGN DS2

ISE N2

LGAT E2

PHAS E2

UGAT E2

BOO T 2

Vc c

COM P

FB

VS EN

FB G

FB R

VID 0

VID 1

VID 2

VID 3

VID 4

PGOOD

OS C / I NH

S GN D

VCCD R

32k

VCC DR

VCC

CH 2 OC P

PW M2

CH2

OC P

CUR REN T

REA D IN G

CUR REN T

REA D IN G

类似零件编号 - L6919ETR

制造商	部件名	数据表	功能描述
STMicroelectronics	L6919C	558Kb / 32P	5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MANAGEMENT Dec-2002
	L6919CD	558Kb / 32P	5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MANAGEMENT Dec-2002
	L6919CDTR	558Kb / 32P	5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MANAGEMENT Dec-2002

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