L6917BDTR Datasheet

IC型號：
L6917BDTR
PDF描述：
5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER
文件大小：
593.37KB
PDF頁數(shù)：
33頁
芯片廠家：
STMICROELECTRONICS

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L6917B

5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER

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 COMPLIANT WITH VRM 9.0

0.8% INTERNAL REFERENCE 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

300 kHz INTERNAL OSCILLATOR

OSCILLATOR EXTERNALLY ADJUSTABLE

UP TO 600kHz

POWER GOOD OUTPUT AND INHIBIT

FUNCTION

REMOTE SENSE BUFFER

PACKAGE: SO-28

SO-28

ORDERING NUMBERS:L6917BD

L6917BDTR (Tape & Reel)

APPLICATIONS

POWER SUPPLY FOR SERVERS AND

WORKSTATIONS

POWER SUPPLY FOR HIGH CURRENT

MICROPROCESSORS

DISTRIBUTED DC-DC CONVERTERS

BLOCK DIAGRAM

ROSC / INH

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擄 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 鹵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,

the system works in Constant Current mode.

SGND

VCCDR

BOOT1

LOGIC PWM

ADAPTIVE ANTI

CROSS-CONDUCTION

PGOOD

2 PHASE

OSCILLATOR

PWM1

UGATE1

PHASE1

CURRENT

CORRECTION

DIGITAL

SOFT START

CH 1 OVER

CURRENT

LGATE1

ISEN1

VCC

VCCDR

LOGIC

AND

PROTECTIONS

TOTAL

CURRENT

READING

PGNDS1

PGND

VID4

VID3

VID2

VID1

VID0

CH1 OVER

CURRENT

AVG

CURRENT

DAC

CH2 OVER

CURRENT

READING

PGNDS2

ISEN2

LOGIC PWM

ADAPTIVE ANTI

CROSS-CONDUCTION

CH 2 OVER

CURRENT

LGATE2

10k

REMOTE

BUFFER

IFB

FBG

FBR

CURRENT

CORRECTION

ERROR

AMPLIFIER

PHASE2

PWM2

UGATE2

10k

Vcc

BOOT2

VSEN

COMP

Vcc

September 2002

1/33

標(biāo)準(zhǔn)包裝
1
類別
集成電路 (IC)
家庭
PMIC - 穩(wěn)壓器 - DC DC 切換控制器
系列
-
PWM 型
電流模式
輸出數(shù)
1
頻率 - 最大
330kHz
占空比
75%
電源電壓
10.8 V ~ 13.2 V
降壓
是
升壓
無
回掃
無
反相
無
倍增器
無
除法器
無
Cuk
無
隔離
無
工作溫度
0°C ~ 70°C
封裝/外殼
28-SOIC（0.295"，7.50mm 寬）
包裝
Digi-Reel®
其它名稱
497-5883-6

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L6917BDTR Datasheet

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