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STMicroelectronics - 5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER

Numéro de référence L6918DTR
Description 5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER
Fabricant STMicroelectronics 
Logo STMicroelectronics 





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L6918DTR fiche technique
L6918 L6918A
5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER
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
PIN CONNECTIONS
SO28
ORDERING NUMBERS: L6918D, L6918AD
L6918DTR, L6918ADTR
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.
LGATE1
VCCDR
PHASE1
UGATE1
BOOT1
VCC
SGND
COMP
FB
VPROG_OUT
SYNC_OUT
SLAVE_OK
ISEN1
PGNDS1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
October 2002
28 PGND
LGATE1
1
27 LGATE2
VCCDR
2
26 PHASE2
PHASE1
3
25 UGATE2
UGATE1
4
24 BOOT2
BOOT1
5
23 PGOOD
VCC
6
22 VID4
SGND
7
21 VID3
COMP
8
20 VID2
FB 9
19 VID1
VSEN
10
18 VID0
FBR 11
17 OSC / INH / FAULT
FBG
12
16 ISEN2
ISEN1
13
15 PGNDS2
PGNDS1
14
28 PGND
27 LGATE2
26 PHASE2
25 UGATE2
24 BOOT2
23 PGOOD
22 VPROG_IN
21 SYNC_IN
20 SLAVE_OK
19 SYNC / ADJ
18 SYNC_OUT
17 OSC / INH / FAULT
16 ISEN2
15 PGNDS2
1/35

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