l6755 STMicroelectronics, l6755 Datasheet

l6755

Manufacturer Part Number

l6755

Description

2/3/4 Phase Buck Controller For Vr10, Vr11 And Am2 Processor Applications

Manufacturer

STMicroelectronics

Datasheet

1.L6755.pdf (3 pages)

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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

Flexible driver support

7/8 bit programmable output - VR10/11 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

L6755

enhances load transient

for VR10, VR11 and AM2 processor applications

VFQFPN40

Package

Rev 1

Description

L6755 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.

L6755 embeds selectable DAC: Output Voltage is

programmable up to 1.6000 V (Intel VR10 and

VR11 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.

L6755 is available in VFQFPN40 7x7 mm

package.

2/3/4 phase buck controller

VFQFPN40

Tape and reel

Packing

Tube

L6755

Data Brief

www.st.com

1/3

Related parts for l6755

l6755 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. L6755 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. L6755 Changes ...

Page 3

... L6755 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. ...

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