L6711_06 Datasheet, PDF (1/50 Pages) STMicroelectronics – 3 Phase controller with dynamic VID and selectable DACs

L6711
3 Phase controller with dynamic VID and selectable DACs
Features
■ 2A integrated gate drivers
■ Fully differential current reading across
inductor or LS MOSFET
■ 0.5% Output voltage accuracy
■ 6 bit programmable output from 0.8185V to
1.5810V in 12.5mV steps
■ 5 bit programmable output from 0.800V to
1.550V in 25mV steps
■ Dynamic VID management
■ Adjustable reference voltage offset
■ 3% active current sharing accuracy
■ Digital 2048 step soft-start
■ Programmable over voltage protection
■ Integrated temperature sensor
■ Constant over current protection
■ Oscillator internally fixed at 150kHz (450kHz
ripple) externally adjustable
■ Output enable
■ Integrated remote sense buffer
■ TQFP48 7x7 Package with exposed pad
Applications
■ High current VRM/VRD for desktop / Server /
Workstation CPUs
■ High density DC/DC Converters
TQFP48 (Exposed Pad)
Description
The device implements a three phase step-down
controller with a 120° phase-shift between each
phase with integrated high current drivers in a
compact 7x7mm body package with exposed pad.
The device embeds selectable DAC: the output
voltage ranges from 0.8185V to 1.5810V with
12.5mV steps (VID_SEL = OPEN) or from 0.800V
to 1.550V with 25mV steps (VID_SEL = GND;
VID5 drives an optional +25mV offset) managing
dynamic VID with 0.5% accuracy over line and
temp variations. Additional programmable offset
can be added to the voltage reference with a
single external resistor.
The device assures a fast protection against load
over current and load over/under voltage. An
internal 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 Current mode until UVP.
Selectable current reading adds flexibility in
system design.
Order codes
Part Number
L6711
L6711TR
Package
TQFP48
TQFP48
Packing
Tube
Tape & Reel
April 2006
Rev 4
1/50
www.st.com
50