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参数资料
| 型号： | L6917D |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封装： | SO-28 |
| 文件页数： | 1/27页 |
| 文件大小： | 411K |
| 代理商： | L6917D |
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1/27
L6917
October 2001
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 COMPLIANT WITH VRM 9.0
s
0.8% INTERNAL REFERENCE 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
300 kHz INTERNAL OSCILLATOR
s
OSCILLATOR EXTERNALLY ADJUSTABLE
UP TO 1MHz
s
POWER GOOD OUTPUT AND INHIBIT
FUNCTION
s
REMOTE SENSE BUFFER
s
PACKAGE: SO-28
APPLICATIONS
s
POWER SUPPLY FOR SERVER AND
WORKSTATION
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 con-
version 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) al-
lows adjusting the output voltage from 1.100V to
1.850V with 25mV binary steps.
The high precision internal reference assures the se-
lected output voltage to be within
±0.8%. 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
or under voltage, the system works in HICCUP mode.
SO-28
ORDERING NUMBERS: L6917D
L6917DTR (Tape & Reel)
5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER
BLOCK DIAGRAM
CURRENT
READ ING
CURRENT
READ ING
IFB
TOTAL
CURR ENT
AVG
CU RRENT
CH 1 OVER
CU RR ENT
CH 2 OVER
CU RR ENT
DAC
DIGI TAL
SO FT STA RT
LOGIC
PWM
ADAPTIVE
ANTI
CROSS-CONDUCTION
LOGIC
PWM
ADAPTIVE
ANTI
CROSS-CONDUCTION
CH1 OVER
CU RR ENT
CH 2 OVER
CURR ENT
LO GIC
AND
PROTECTIONS
2 PH ASE
OSCILLATOR
PWM1
CURRENT
CORRECTION
PWM2
CURRENT
CORRECTION
ERROR
AMPLIFIER
REMOT E
BUF FER
10k
LS
HS
Vcc
HS
BOOT 1
UGATE1
PH ASE1
LG ATE1
ISEN1
PGNDS 1
PGND
PGNDS 2
ISEN2
LG ATE2
PH ASE2
UGATE2
BOOT 2
Vc c
COMP
FB
VSEN
FBG
FBR
VID0
VID1
VID2
VID3
VID4
PGO OD
ROSC / IN H
SG ND
VCCDR
10k
<>
+
-
+
-
VCC DR
VCC
相关PDF资料 |
PDF描述 |
|---|---|
| L6918ADTR | SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PDSO28 |
| L6918AD | SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PDSO28 |
| L6919CD | SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO28 |
| L6919E | SWITCHING CONTROLLER, PDSO28 |
| L6920DTR | 1.2 A SWITCHING REGULATOR, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L6917DTR | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| L6918 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER |
| L6918A | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER |
| L6918AD | 功能描述:DC/DC 开关控制器 Prog Multi-Phase Cnt RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6918ADTR | 功能描述:DC/DC 开关控制器 Prog Multi-Phase Cnt RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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