L6712AQTR datasheet(1/29 Pages) STMICROELECTRONICS

No de pièce	L6712AQTR

Description	TWO-PHASE INTERLEAVED DC/DC CONTROLLER

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L6712

L6712A

June 2005

1

Features

■ 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

1.1 Applications

■ HIGH CURRENT DC/DC CONVERTERS

■ DISTRIBUTED POWER SUPPLY

2

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.

TWO-PHASE INTERLEAVED DC/DC CONTROLLER

Figure 1. Packages

Table 1. Order Codes

Package

Tube

Tape & Reel

SO

L6712D,

L6712AD

L6712DTR,

L6712ADTR

VFQFPN

L6712Q,

L6712AQ

L6712QTR,

L6712AQTR

SO28

VFQFPN-36 (6x6x1.0mm)

Rev. 3

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Fabricant	No de pièce	Fiches technique	Description
STMicroelectronics	L6712AQTR	1Mb / 27P	TWO-PHASE INTERLEAVED DC/DC CONTROLLER

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