參數(shù)資料
型號(hào)： L6919ETR
廠商： 意法半導(dǎo)體
英文描述： 5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MANAGEMENT
中文描述： 5位可編程雙相與動(dòng)態(tài)VID管理控制器
文件頁(yè)數(shù)： 1/33頁(yè)
文件大?。?/td> 606K
代理商： L6919ETR
1/33
L6919E
September 2003
I
2 PHASE OPERATION WITH
SYNCRHONOUS RECTIFIER CONTROL
I
ULTRA FAST LOAD TRANSIENT RESPONSE
I
INTEGRATED HIGH CURRENT GATE
DRIVERS: UP TO 2A GATE CURRENT
I
TTL-COMPATIBLE 5 BIT PROGRAMMABLE
OUTPUT FROM 0.800V TO 1.550V WITH
25mV STEPS
I
DYNAMIC VID MANAGEMENT
I
0.6% OUTPUT VOLTAGE ACCURACY
I
10% ACTIVE CURRENT SHARING ACCURACY
I
DIGITAL 2048 STEP SOFT-START
I
OVERVOLTAGE PROTECTION
I
OVERCURRENT PROTECTION REALIZED
USING THE LOWER MOSFET'S R
dsON
OR A
SENSE RESISTOR
I
OSCILLATOR EXTERNALLY ADJUSTABLE
AND INTERNALLY FIXED AT 200kHz
I
POWER GOOD OUTPUT AND INHIBIT
FUNCTION
I
REMOTE SENSE BUFFER
I
PACKAGE: SO-28
APPLICATIONS
I
POWER SUPPLY FOR SERVERS AND
WORKSTATIONS
I
POWER SUPPLY FOR HIGH CURRENT
MICROPROCESSORS
I
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
REA DING
CUR REN T
OCP
DAC
SOFT-START
CH1 OCP
PW M1
A MPLIFIER
BUFFER
32k
32k
32k
LS
LS
HS
Vcc
HS
BOO T1
PHAS E1
LGATE1
ISEN1
PGN DS1
PGN D
PGN DS2
ISEN2
LGATE2
PHAS E2
UGATE2
BOO T2
Vcc
COMP
FB
VSEN
FBG
FBR
VID0
VID1
VID2
VID3
VID4
PGOOD
OSC / INH
SGN D
VCCD R
32k
VCC DR
VCC
CH2 OCP
PW M2
OCP
REA DING
CURRENT
I
FB
TO TAL
C
A
CH1
DIGITAL
L
A
C
2
O
C
C
ERR OR
REMOTE
U
GAT E1
L
P
C
C
CH2
CURRENT
L
A
C
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L6920DBTR 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 SYNCRONOUS RECT. STEP UP CONVERTER RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
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