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L6919CD 데이터시트(PDF) 1 Page - STMicroelectronics

부품명 L6919CD
상세설명  5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MANAGEMENT
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6919CD 데이터시트(HTML) 1 Page - STMicroelectronics

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L6919C
December 2002
s
2 PHASE OPERATION WITH
SYNCRHONOUS RECTIFIER CONTROL
s
ULTRA FAST LOAD TRANSIENT RESPONSE
s
INTEGRATED HIGH CURRENT GATE
DRIVERS: UP TO 2A GATE CURRENT
s
TTL-COMPATIBLE 5 BIT PROGRAMMABLE
OUTPUT FROM 0.800V TO 1.550V WITH
25mV STEPS
s
DYNAMIC VID MANAGEMENT
s
0.6% OUTPUT VOLTAGE ACCURACY
s
10% ACTIVE CURRENT SHARING ACCURACY
s
DIGITAL 2048 STEP SOFT-START
s
OVERVOLTAGE PROTECTION
s
OVERCURRENT PROTECTION REALIZED
USING THE LOWER MOSFET'S RdsON OR A
SENSE RESISTOR
s
OSCILLATOR EXTERNALLY ADJUSTABLE
AND INTERNALLY FIXED AT 200kHz
s
POWER GOOD OUTPUT AND INHIBIT
FUNCTION
s
REMOTE SENSE BUFFER
s
PACKAGE: SO-28
APPLICATIONS
s
POWER SUPPLY FOR SERVERS AND
WORKSTATIONS
s
POWER SUPPLY FOR HIGH CURRENT
MICROPROCESSORS
s
DISTRIBUTED POWER SUPPLY
DESCRIPTION
The device is a power supply controller specifically de-
signed to provide a high performance DC/DC conver-
sion for high current microprocessors. The device
implements a dual-phase step-down controller with a
180° phase-shift between each phase. A precise 5-bit
digital to analog converter (DAC) allows adjusting the
output voltage from 0.800V to 1.550V with 25mV binary
steps managing On-The-Fly VID code changes.
The high precision internal reference assures the se-
lected output voltage to be within ±0.6%. The high
peak current gate drive affords to have fast switching
to the external power mos providing low switching
losses.
The device assures a fast protection against load
over current and load over/under voltage. An internal
crowbar is provided turning on the low side mosfet if
an over-voltage is detected. In case of over-current,
the system works in Constant Current mode.
SO-28
ORDERING NUMBERS:L6919CD
L6919CDTR
5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER
WITH DYNAMIC VID MANAGEMENT
BLOCK DIAGRAM
CURREN T
REA DIN G
I
FB
TO TA L
C U RRENT
CH1
OCP
DA C
D IGITAL
SOF T-START
CH1 OC P
PW M1
ERR OR
A MPL IF IER
REMO TE
BU FFE R
32k
32k
32k
LS
LS
HS
Vc c
HS
BO O T 1
U
GA T E1
PH AS E1
LGAT E1
ISE N1
PG N DS 1
PG N D
PG N DS 2
ISE N2
LGAT E2
PH AS E2
UGA T E2
BO O T 2
Vcc
CO M P
FB
VS EN
FB G
FB R
VID 0
VID 1
VID 2
VID 3
VID 4
PGOO D
O S C / I N H
SGND
VC CD R
32 k
VC C D R
VC C
CH2 OC P
PW M2
CH2
OCP
CURREN T
REA DIN G
CURREN T
REA DIN G
CURREN T
REA DIN G
I
FB
TO TA L
C U RRENT
CH1
OCP
DA C
D IGITAL
SOF T-START
CH1 OC P
PW M1
ERR OR
A MPL IF IER
REMO TE
BU FFE R
32k
32k
32k
LS
LS
HS
Vc c
HS
BO O T 1
U
GA T E1
PH AS E1
LGAT E1
ISE N1
PG N DS 1
PG N D
PG N DS 2
ISE N2
LGAT E2
PH AS E2
UGA T E2
BO O T 2
Vcc
CO M P
FB
VS EN
FB G
FB R
VID 0
VID 1
VID 2
VID 3
VID 4
PGOO D
O S C / I N H
SGND
VC CD R
32 k
VC C D R
VC C
CH2 OC P
PW M2
CH2
OCP
CURREN T
REA DIN G
CURREN T
REA DIN G


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