L6712AD datasheet(1/27 Pages) STMICROELECTRONICS

部件名	L6712AD

功能描述	TWO-PHASE INTERLEAVED DC/DC CONTROLLER

PDF	27 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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L6712

L6712A

March 2004

■ 2 PHASE OPERATION WITH

SYNCHRONOUS RECTIFIER CONTROL

■ ULTRA FAST LOAD TRANSIENT RESPONSE

■ INTEGRATED HIGH CURRENT GATE

DRIVERS: UP TO 2A GATE CURRENT

■ 3 BIT PROGRAMMABLE OUTPUT FROM

0.900V TO 3.300V OR WITH EXTERNAL REF.

■ ±0.9% OUTPUT VOLTAGE ACCURACY

■ 3mA CAPABLE AVAILABLE REFERENCE

■ INTEGRATED PROGRAMMABLE REMOTE

SENSE AMPLIFIER

■ PROGRAMMABLE DROOP EFFECT

■ 10% ACTIVE CURRENT SHARING ACCURACY

■ DIGITAL 2048 STEP SOFT-START

■ CROWBAR LATCHED OVERVOLTAGE PROT.

■ NON-LATCHED UNDERVOLTAGE PROT.

■ OVERCURRENT PROTECTION REALIZED

USING THE LOWER MOSFET'S RdsON OR A

SENSE RESISTOR

■ OSCILLATOR EXTERNALLY ADJUSTABLE

AND INTERNALLY FIXED AT 150kHZ

■ POWER GOOD OUTPUT AND INHIBIT FUNCTION

■ PACKAGES: SO-28 & VFQFPN-36

APPLICATIONS

■ HIGH CURRENT DC/DC CONVERTERS

■ DISTRIBUTED POWER SUPPLY

DESCRIPTION

The device implements a dual-phase step-down con-

troller with a 180 phase-shift between each phase

optimized for high current DC/DC applications.

Output voltage can be programmed through the in-

tegrated DAC from 0.900V to 3.300V; program-

ming the "111" code, an external reference from

0.800V to 3.300V is used for the regulation.

Programmable Remote Sense Amplifier avoids

use of external resistor divider and recovers loss-

es along distribution line.

The device assures a fast protection against load

over current and Over / Under voltage.An internal

crowbar is provided turning on the low side mosfet

if Over-voltage is detected.

Output current is limited working in Constant Cur-

rent mode: when Under Voltage is detected, the

device resets, restarting operation.

SO28

VFQFPN-36 (6x6x1.0)

ORDERING NUMBERS:

Package

Tube

Tape & Reel

SO

L6712D, L6712AD

L6712DTR, L6712ADTR

VFQFPN L6712Q, L6712AQ

L6712QTR, L6712AQTR

TWO-PHASE INTERLEAVED DC/DC CONTROLLER

BLOCK DIAGRAM

CURRENT

READING

TOTAL

CURRENT

CH1

OCP

DAC

CH1 OCP

PWM1

ERROR

AMPLIFIER

REMOTE

AMPLIFIER

LS

HS

Vcc

HS

BOOT1

UGATE1

PHASE1

LGATE1

ISEN1

PGNDS1

PGND

PGNDS2

ISEN2

LGATE2

PHASE2

UGATE2

BOOT2

Vcc

COMP

FB

VSEN

FBG

FBR

VID0

VID1

VID2

OSC / INH

SGND

VCCDR

VCC

LOGIC AND

PROTECTIONS

PWM2

CH2

OCP

CURRENT

READING

REF_IN/OUT

PGOOD

DROOP

BAND-GAP

REFERENCE

DIGITAL

SOFT-START

CH2 OCP

V

PROG

CURRENT

READING

TOTAL

CURRENT

CH1

OCP

DAC

CH1 OCP

PWM1

ERROR

AMPLIFIER

REMOTE

AMPLIFIER

LS

HS

Vcc

HS

BOOT1

UGATE1

PHASE1

LGATE1

ISEN1

PGNDS1

PGND

PGNDS2

ISEN2

LGATE2

PHASE2

UGATE2

BOOT2

Vcc

COMP

FB

VSEN

FBG

FBR

VID0

VID1

VID2

OSC / INH

SGND

VCCDR

VCC

LOGIC AND

PROTECTIONS

PWM2

CH2

OCP

CURRENT

READING

REF_IN/OUT

PGOOD

DROOP

BAND-GAP

REFERENCE

DIGITAL

SOFT-START

CH2 OCP

V

PROG

类似零件编号 - L6712AD

制造商	部件名	数据表	功能描述
STMicroelectronics	L6712AD	626Kb / 29P	TWO-PHASE INTERLEAVED DC/DC CONTROLLER Jun-2005
STMicroelectronics	L6712ADTR	626Kb / 29P	TWO-PHASE INTERLEAVED DC/DC CONTROLLER Jun-2005

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