L6756 STMicroelectronics, L6756 Datasheet
L6756
Manufacturer Part Number
L6756
Description
2/3/4 Phase Buck Controller For Vr10, Vr11.1 And Am2 Processor Applications
Manufacturer
STMicroelectronics
Datasheet
1.L6756.pdf
(3 pages)
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Features
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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
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L6756 Summary of contents
Page 1
... 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. Package VFQFPN40 VFQFPN40 Rev 1 ...
Page 2
... Revision history 1 Revision history Table 2. Document revision history Date 15-Feb-2008 2/3 Revision 1 Initial release. L6756 Changes ...
Page 3
... L6756 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...