L6918 datasheet(1/35 Pages) STMICROELECTRONICS

部件名	L6918

功能描述	5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER

PDF	35 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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L6918 L6918A

October 2002

s

OUTPUT CURRENT IN EXCESS OF 100A

s

ULTRA FAST LOAD TRANSIENT RESPONSE

s

REMOTE SENSE BUFFER

s

INTEGRATED 2A GATE DRIVERS

s

5 BIT VID VOLTAGE POSITIONING, VRM 9.0

s

0.6% INTERNAL REFERENCE ACCURACY

s

DIGITAL 2048 STEP SOFT-START

s

OVP & OCP PROTECTIONS

s

Rdson or Rsense CURRENT SENSING

s

1200KHz EFFECTIVE SWITCHING

FREQUENCY, EXTERNALLY ADJUSTABLE

s

POWER GOOD OUTPUT AND INHIBIT

s

PACKAGE: SO28

APPLICATIONS

s

HIGH DENSITY DC-DC FOR SERVERS AND

WORKSTATIONS

s

SUPPLY FOR HIGH CURRENT

MICROPROCESSORS

s

DISTRIBUTED POWER

DESCRIPTION

L6918A is a master device that it has to be combined

with the L6918,slave, realizing a 4-phases topology,

interleaved. The device kit is specifically designed to

provide a high performance/high density DC/DC con-

version for high current microprocessors and distrib-

uted power. Each device implements a dual-phase

step-down controller with a 180° phase-shift between

each phase.

A precise 5-bit DAC allows adjusting the output volt-

age from 1.100V to 1.850V with 25mV binary steps.

The high peak current gate drives affords to have

high

system

switching

frequency,

typically

of

1200KHz, and higher by external adjustement.

The device kit assure a fast protection against OVP,

UVP and OCP. An internal crowbar, by turning on the

low side mosfets, eliminates the need of external pro-

tection. In case of over-current, the system works in

Constant Current mode.

SO28

ORDERING NUMBERS: L6918D, L6918AD

L6918DTR, L6918ADTR

5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER

PIN CONNECTIONS

1

3

2

4

5

6

7

8

9

18

17

16

15

19

20

10

11

12

13

14

24

23

22

21

25

26

27

28

LGATE1

VCCDR

PHASE1

FB

BOOT1

UGATE1

VSEN

VCC

SGND

COMP

ISEN1

PGNDS1

FBR

FBG

SYNC_IN

SLAVE_OK

SYNC / ADJ

VPROG_IN

BOOT2

PGOOD

UGATE2

PHASE2

LGATE2

PGND

OSC / INH / FAULT

ISEN2

PGNDS2

SYNC_OUT

1

3

2

4

5

6

7

8

9

18

17

16

15

19

20

10

11

12

13

14

24

23

22

21

25

26

27

28

LGATE1

VCCDR

PHASE1

FB

BOOT1

UGATE1

VPROG_OUT

VCC

SGND

COMP

ISEN1

PGNDS1

SYNC_OUT

SLAVE_OK

VID3

VID2

VID1

VID4

BOOT2

PGOOD

UGATE2

PHASE2

LGATE2

PGND

OSC / INH / FAULT

ISEN2

PGNDS2

VID0

类似零件编号 - L6918

制造商	部件名	数据表	功能描述
STMicroelectronics	L6910	453Kb / 21P	ADJUSTABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION Jul-2003
	L6910	682Kb / 29P	ADJUSTABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION May-2005
	L6910A	453Kb / 21P	ADJUSTABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION Jul-2003
	L6910A	682Kb / 29P	ADJUSTABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION May-2005
	L6910ATR	453Kb / 21P	ADJUSTABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION Jul-2003

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类似说明 - L6918

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