L6701 Datasheet, PDF (1/44 Pages) STMicroelectronics – 3 Phase Controller for VR10, VR9 and K8 CPUs

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
PowerSSO-36
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 R_DS(on) current
sensing assures precision in voltage positioning
and safe current sharing and OCP per each
phase.
Order codes
Part number
L6701
L6701TR
December 2005
Package
PowerSSO-36
PowerSSO-36
Packing
Tube
Tape & Reel
Rev 1
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