L6701 datasheet(1/44 Pages) STMICROELECTRONICS

Part #	L6701

Description	3 Phase Controller for VR10, VR9 and K8 CPUs

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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Rev 1

December 2005

1/44

44

L6701

3 Phase Controller for VR10, VR9 and K8 CPUs

Features

■

MULTI-DAC: VR9, VR10 AND K8 DAC

SELECTABLE THROUGH SINGLE PIN

■

0.7% OUTPUT VOLTAGE ACCURACY

■

ADJUSTABLE REFERENCE OFFSET

■

HIGH CURRENT INTEGRATED DRIVERS

■

DYNAMIC VID MANAGEMENT

■

ACCURATE FULLY-DIFFERENTIAL LOAD-

LINE CURRENT-SENSE ACROSS MAIN

INDUCTORS MAKES BOM INDEPENDENT

ON THE LAYOUT

■

PRECISE CURRENT-SHARING AND OCP

ACROSS LS MOSFETS

■

CONSTANT OVER-CURRENT PROTECTION

■

FEEDBACK DISCONNECTION

PROTECTION

■

PRELIMINARY OV PROTECTION

■

OSCILLATOR INTERNALLY FIXED AT

100kHz (300kHz RIPPLE) EXT ADJUSTABLE

■

SS_END / PGOOD SIGNAL

■

INTEGRATED REMOTE-SENSE BUFFER

■

PWSSO36 PACKAGE WITH EXPOSED PAD

Applications

■

HIGH CURRENT VRM / VRD FOR DESKTOP

/ SERVER/ WORKSTATION CPUs

■

HIGH DENSITY DC / DC CONVERTERS

Description

L6701 is an extremely simple, low-cost solution to

implement a three phase step-down controller

with integrated high-current drivers in a compact

PowerSSO-36 package with exposed pad.

The device embeds three selectable DACs: with a

single pin it is possible to program the device to

work in compatibility with VR9, VR10 or K8

applications managing D-VID with ±0.7% output

voltage accuracy over line and temperature

variations. Additional programmable offset can be

added to the reference voltage with a single

external resistor.

Fast protection against load over current let the

system works in Constant Current mode until

UVP. Preliminary OVP allows full load protection

in case of startup with failed HS. Furthermore,

feedback disconnection prevents from damaging

the load in case of misconnections in the system

board.

Combined use of DCR and RDS(on) current

sensing assures precision in voltage positioning

and safe current sharing and OCP per each

phase.

PowerSSO-36

www.st.com

Order codes

Part number

Package

Packing

L6701

PowerSSO-36

Tube

L6701TR

PowerSSO-36

Tape & Reel

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