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参数资料
型号： L6919ETR
厂商： STMICROELECTRONICS
元件分类： 稳压器
英文描述： SWITCHING CONTROLLER, PDSO28
封装： SO-28
文件页数： 1/33页
文件大小： 644K
代理商： L6919ETR
1/33
L6919E
September 2003
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
designed to provide a high performance DC/DC
conversion for high current microprocessors. The
device implements a dual-phase step-down con-
troller 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 manag-
ing On-The-Fly VID code changes.
The high precision internal reference assures the
selected 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 inter-
nal 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 Cur-
rent mode.
SO-28
ORDERING NUMBERS:L6919E
L6919ETR
5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER
WITH DYNAMIC VID MANAGEMENT
BLOCK DIAGRAM
CUR REN T
REA D IN G
I
FB
TO TAL
CUR REN T
CUR
RE
N
T
AV
G
CH1
OC P
DA C
DIGIT AL
SOFT- START
LO
G
IC
P
W
M
AD
A
P
T
IVE
A
N
T
I
CR
O
S
C
O
ND
U
C
T
IO
N
CH1 OCP
2
P
H
A
S
E
OS
C
IL
L
A
T
O
R
PW M1
CU
R
E
N
T
CO
R
E
C
T
IO
N
ERR OR
AMPL IF IER
REMO TE
BU FFE R
32k
LS
HS
Vc c
HS
BOO T 1
U
GA T E1
PHAS E1
LGAT E1
ISE N1
PGN DS1
PGN D
PGN DS2
ISE N2
LGAT E2
PHAS E2
UGAT E2
BOO T 2
Vc c
COM P
FB
VS EN
FB G
FB R
VID 0
VID 1
VID 2
VID 3
VID 4
PGOOD
OS C / I NH
S GN D
VCCD R
32k
VCC DR
VCC
L
O
G
IC
A
N
D
PR
O
T
EC
T
IO
N
S
CH 2 OC P
PW M2
C
U
RRE
NT
CO
RR
E
C
T
IO
N
CH2
OC P
CUR REN T
REA D IN G
LO
G
IC
P
W
M
AD
AP
T
IV
E
A
N
T
I
CRO
S
CO
N
D
U
C
T
IO
N
CUR REN T
REA D IN G
CUR REN T
REA D IN G
I
FB
TO TAL
CUR REN T
CUR
RE
N
T
AV
G
CH1
OC P
DA C
DIGIT AL
SOFT- START
LO
G
IC
P
W
M
AD
A
P
T
IVE
A
N
T
I
CR
O
S
C
O
ND
U
C
T
IO
N
LO
G
IC
P
W
M
AD
A
P
T
IVE
A
N
T
I
CR
O
S
C
O
ND
U
C
T
IO
N
CH1 OCP
2
P
H
A
S
E
OS
C
IL
L
A
T
O
R
PW M1
CU
R
E
N
T
CO
R
E
C
T
IO
N
ERR OR
AMPL IF IER
REMO TE
BU FFE R
32k
LS
HS
Vc c
HS
BOO T 1
U
GA T E1
PHAS E1
LGAT E1
ISE N1
PGN DS1
PGN D
PGN DS2
ISE N2
LGAT E2
PHAS E2
UGAT E2
BOO T 2
Vc c
COM P
FB
VS EN
FB G
FB R
VID 0
VID 1
VID 2
VID 3
VID 4
PGOOD
OS C / I NH
S GN D
VCCD R
32k
VCC DR
VCC
L
O
G
IC
A
N
D
PR
O
T
EC
T
IO
N
S
CH 2 OC P
PW M2
C
U
RRE
NT
CO
RR
E
C
T
IO
N
CH2
OC P
CUR REN T
REA D IN G
CUR REN T
REA D IN G
LO
G
IC
P
W
M
AD
AP
T
IV
E
A
N
T
I
CRO
S
CO
N
D
U
C
T
IO
N
LO
G
IC
P
W
M
AD
AP
T
IV
E
A
N
T
I
CRO
S
CO
N
D
U
C
T
IO
N
Obsolete
Product(s)
- Obsolete
Product(s)
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