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L6756 데이터시트(PDF) 1 Page - STMicroelectronics

부품명 L6756
상세설명  2/3/4 phase buck controller for VR10, VR11.1 and AM2 processor applications
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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Data Brief
For further information contact your local STMicroelectronics sales office.
February 2008
Rev 1
1/3
3
L6756
2/3/4 phase buck controller
for VR10, VR11.1 and AM2 processor applications
Features
LTB technology® enhances load transient
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
Applications
High-current VRM / VRD for desktop / server /
workstation CPUs
Graphic cards
Low-voltage, high-current power supplies
High-density DC / DC converters
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® to
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.
VFQFPN40
Table 1.
Device summary
Order code
Package
Packing
L6756
VFQFPN40
Tube
L6756TR
VFQFPN40
Tape & Reel
www.st.com


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