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PDF L6756D Data sheet ( Hoja de datos )

Número de pieza L6756D
Descripción 2/3/4 phase buck controller
Fabricantes STMicroelectronics 
Logotipo STMicroelectronics Logotipo



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L6756D
2/3/4 phase buck controller
for VR10, VR11 and VR11.1 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 - VR10/11.1 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 output
Programmable soft-start
Threshold sensitive enable pin for VTT
Sensing
VFQFPN40 6x6 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
VFQFPN40 6x6 mm
Description
L6756D 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.
L6756D embeds selectable DAC: output voltage
is programmable up to 1.6000 V (Intel VR10 and
VR11.x DACs) 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.
L6756D is available in VFQFPN 6x6 mm package
Table 1.
Device summary
Order code
L6756D
L6756DTR
Package
VFQFPN40
VFQFPN40
Packing
Tube
Tape and reel
October 2008
Rev 1
1/36
www.st.com
1

1 page




L6756D pdf
L6756D
Figure 2. Typical 3phase application circuit
 

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5/36

5 Page





L6756D arduino
L6756D
Pins description and connection diagrams
2.2
Thermal data
Table 3. Thermal data
Symbol
Parameter
RthJA
RthJC
TMAX
TSTG
TJ
Thermal resistance junction to ambient
(Device soldered on 2s2p PC board)
Thermal resistance junction to case
Maximum junction temperature
Storage temperature range
Junction temperature range
Value
Unit
35
1
150
-40 to 150
0 to 125
°C/W
°C/W
°C
°C
°C
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