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L6919ETR Datasheet

  • L6919ETR

  • 5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MA...

  • 33頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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L6919E
5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER
WITH DYNAMIC VID MANAGEMENT
s
s
s
s
s
s
s
s
s
s
s
s
s
s
2 PHASE OPERATION WITH
SYNCRHONOUS RECTIFIER CONTROL
ULTRA FAST LOAD TRANSIENT RESPONSE
INTEGRATED HIGH CURRENT GATE
DRIVERS: UP TO 2A GATE CURRENT
TTL-COMPATIBLE 5 BIT PROGRAMMABLE
OUTPUT FROM 0.800V TO 1.550V WITH
25mV STEPS
DYNAMIC VID MANAGEMENT
0.6% OUTPUT VOLTAGE ACCURACY
10% ACTIVE CURRENT SHARING ACCURACY
DIGITAL 2048 STEP SOFT-START
OVERVOLTAGE PROTECTION
OVERCURRENT PROTECTION REALIZED
USING THE LOWER MOSFET'S R
dsON
OR A
SENSE RESISTOR
OSCILLATOR EXTERNALLY ADJUSTABLE
AND INTERNALLY FIXED AT 200kHz
POWER GOOD OUTPUT AND INHIBIT
FUNCTION
REMOTE SENSE BUFFER
PACKAGE: SO-28
SO-28
ORDERING NUMBERS:L6919E
L6919ETR
APPLICATIONS
s
POWER SUPPLY FOR SERVERS AND
WORKSTATIONS
s
POWER SUPPLY FOR HIGH CURRENT
MICROPROCESSORS
s
DISTRIBUTED POWER SUPPLY
BLOCK DIAGRAM
O S C / I NH
S GN D
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擄 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 鹵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.
VC C D R
BOO T 1
2 P H AS E
O S C IL L ATOR
L O G IC PW M
PW M1
A DA PTIV E A NT I
CRO SS CO ND UCT IO N
PGO O D
HS
U
T
GA
E1
PHAS E1
C U RR EN T
COR R EC TI ON
DIGIT AL
SOFT- START
LOGIC AN D
P ROTE CTION S
CH1
O CP
LS
L GAT E1
ISE N1
V CC
V CC DR
TO TAL
C UR REN T
C U R R EN T
AV G
CUR REN T
REA DIN G
PGN DS1
PGN D
VID 4
VID 3
VID 2
VID 1
VID 0
D AC
CH 2 OC P
C H1 OCP
CUR REN T
REA DIN G
PGN DS2
ISE N2
CU R R EN T
C OR R EC TI ON
32k
3 2k
I
FB
CH2
O CP
FB G
FB R
LO G IC PW M
A DA PT IV E A N T I
CRO SS CO N DU CT IO N
LS
L GAT E2
PHAS E2
3 2k
PW M2
HS
32k
R EMO TE
BU FFE R
ERR OR
A MPL IF IER
U GA T E2
Vc c
BOO T 2
V S EN
FB
COM P
V cc
September 2003
1/33

L6919ETR 產(chǎn)品屬性

  • 1,000

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 切換控制器

  • -

  • 電流模式

  • 1

  • 178kHz

  • 80%

  • 10.2 V ~ 13.8 V

  • 是

  • 無

  • 無

  • 無

  • 無

  • 無

  • 無

  • 無

  • 0°C ~ 70°C

  • 28-SOIC（0.295"，7.50mm 寬）

  • 帶卷 (TR)

  • 497-4221-2

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