Features
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
Applications
■
■
■
■
Table 1.
February 2008
For further information contact your local STMicroelectronics sales office.
LTB technology
response
2 to 4 scalable phase operation
Dual-edge asynchronous architecture
PSI# input with programmable strategy
IMON output
Flexible driver support
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 DCR
Integrated remote sense buffer
Feedback disconnection protection
Adjustable oscillator from 100 kHz to 1 MHz
LSLess startup to manage pre-biased ouptut
Programmable Soft-start
Threshold sensitive enable Pin for VTT
Sensing
VFQFPN40 7x7 mm package
High-current VRM / VRD for desktop / server /
workstation CPUs
Graphic cards
Low-voltage, high-current power supplies
High-density DC / DC converters
Order code
Device summary
L6756
L6756
®
TR
enhances load transient
for VR10, VR11.1 and AM2 processor applications
VFQFPN40
VFQFPN40
Package
Rev 1
Description
L6756 is a two-to-four phase controller designed
to power Intel’s most demanding Processors and,
most in general, low-voltage, high-current power
supplies. The device features LTB technology
provide the fastest response to load transients
thus minimizing the output filter composition.
L6756 embeds selectable DAC: Output Voltage is
programmable up to 1.6000 V (Intel VR10 and
VR11.x DACs) or up to 1.550 V (AMD 6bit DAC)
managing DVID transitions with ±0.5 % output
voltage accuracy over line, load and temperature
variations.
The device assures fast protection against load
over current and under / over voltage. Feedback
disconnection prevents from damaging the load in
case of misconnections in the system board.
Low-Side-Less start-up allows soft-start over pre-
biased output avoiding dangerous current return
through the main inductors as well as negative
spike at the load side.
L6756 is available in VFQFPN40 7x7 mm
package.
2/3/4 phase buck controller
VFQFPN40
Tape & Reel
Packing
Tube
L6756
Data Brief
www.st.com
®
1/3
to
3