L6750 Datasheet, PDF (1/3 Pages) STMicroelectronics – 2 to 5 phase controller with LTB technology for VR11.x and AMD6bit CPUs featuring I2C interface

L6750
2 to 5 phase controller with LTB technology^®
for VR11.x and AMD6bit CPUs featuring I2C interface
Data Brief
Features
■ LTB technology^® to enhance load transient
■ I2C power manager
■ 2 to 5 scalable phase operation
■ Dual-edge asynchronous architecture
■ Flexible driver support
■ PSI# input and IMON output for VR11.1
■ 7/8 bit programmable output - VR10/11.x DAC
■ 6 bit programmable output - AMD AM2 DAC
■ 0.5 % output voltage accuracy
■ Full-differential current sense across inductor
DCR
■ Integrated remote sense buffer
■ Adaptive Voltage Positioning (AVP)
■ Feedback disconnection protection
■ Adjustable oscillator from 100 kHz to 1 MHz
■ LSLess startup to manage pre-biased output
■ Programmable Soft-start
■ Threshold sensitive enable pin for VTT
Sensing
■ VFQFPN48 7x7 mm package
Applications
■ High-Current VRM / VRD for desktop / server /
workstation CPUs
■ Graphic cards
■ Low-voltage, high-current power supplies
■ High-density DC DC converters
VFQFPN48 - 7x7 mm
Description
L6750 is a two-to-five phase controller designed
to power Intel’s most demanding PIV Processors
and, most in general, low-voltage, high-current
power supplies. The device features LTB
technology^® to provide the fastest response to
load transients thus minimizing the output filter
composition.
L6750 features Power Manager I2C to implement
overspeeding and other power management
options without using any external component.
The device embeds selectable DAC: Output Volt-
age is programmable up to 1.6000V (Intel VR10
and VR11.x DACs) or up to 1.550V (AMD 6bit
DAC) managing DVID transitions with ±0.5% out-
put voltage accuracy over line, load and tempera-
ture variations.
The device assures fast protection against load
over current, under / over voltage and feedback
disconnections. Low-Side-Less start-up allows
soft-start over pre-biased output avoiding danger-
ous current return through the main inductors as
well as negative spike at the load side.L6750 is
available in VFQFPN48 7x7 mm package
Table 1.
Device summary
Order code
L6750
L6750TR
Package
VFQFPN48
VFQFPN48
Packing
Tube
Tape and reel
February 2008
Rev 1
For further information contact your local STMicroelectronics sales office.
1/3
www.st.com
3