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4245 Hot Swap

TM

controller allows a board to

be safely inserted and removed from a live backplane in

multiple supply systems such as CompactPCI and PCI

Express. Using four external N-channel pass transistors,

the board supply voltages can be ramped up at an adjust-

able rate and in any desired sequence. An I

2

C interface and

onboard ADC allow monitoring of board current, voltage

and fault status for each supply.

The device features adjustable dI/dt controlled soft start

and foldback limited inrush current. A dual-level timed

circuit breaker and fast current limit protect each supply

against overcurrent faults. A power good input with timeout

allows a downstream supply monitor to disconnect the

board supplies. The device can be con gured to function

without a 12V supply or with an extra 3.3V supply instead

of a 5V supply.

The controller has additional features to interrupt the host

when a fault has occurred, notify when output power is

good, detect insertion of a load card and power-up in

either the on or off state.

?/DIV>

Live Board Insertion

?/DIV>

CompactPCI, CompactPCI Express, CompactTCA,

PCI Express Systems

?/DIV>

Allows Safe Insertion into Live CompactPCI

TM

or

PCI Express

TM

Backplane

?/DIV>

8-Bit ADC Monitors Current and Voltage

?/DIV>

I

2

C

TM

/SMBus Interface

?/DIV>

dI/dt Controlled Soft Start

?/DIV>

Simultaneous or Sequenced Turn-On

?/DIV>

?0V Absolute Maximum Rating for ?2V Supplies

?/DIV>

No External Gate Capacitor Required

?/DIV>

Dual-Level Circuit Breaker and Current Limit

?/DIV>

Bus Precharge Output

?/DIV>

Power Good Input with Timeout

?/DIV>

Optional Latchoff or Autoretry After Faults

?/DIV>

Alerts Host After Faults

?/DIV>

Integrated LOCAL_PCI_RST# Logic

?/DIV>

36-Pin SSOP and 38-Pin (5mm ?7mm) QFN

Packages

Sequenced Turn-On Waveform

APPLICATIO S

FEATURES

DESCRIPTIO

TYPICAL APPLICATIO

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

V

EEIN

GND

PCI_RST#

ALERT#

SCL

SDA

HEALTHY#

BOARD

RESET

SUPPLY

MONITOR

RESET

12V

OUT

TO BUS

5V

OUT

12V

OUT

3.3V

OUT

CARD

CONNECTOR

BACKPLANE

CONNECTOR

BD_SEL#

12V

IN

3V

OUT

PRECHARGE

LOCAL_PCI_RESET#

LTC4245

PGI

ON

5V

OUT

12V

SENSE

12V

GATE

12V

OUT

5V

IN

5V

SENSE

5V

GATE

V

EESENSE

V

EEGATE

V

EEOUT

3V

IN

3V

SENSE

3V

GATE

CompactPCI Application

OUTPUT

VOLTAGE

5V/DIV

4245 TA01b

LOCAL_PCI_RST#

5V/DIV

TIME (50ms/DIV)

BD_SEL#

10V/DIV

V

EEOUT

5V

OUT

3V

OUT

12V

OUT

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相關代理商/技術參數	參數描述
LTC4245IG	制造商:LINER 制造商全稱:Linear Technology 功能描述:Multiple Supply Hot Swap Controller with I2C Compatible Monitoring
LTC4245IG#PBF	功能描述:IC CNTRLR HOT SWAP 36-SSOP RoHS:是類別:集成電路 (IC) >> PMIC - 熱交換系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:119 系列:- 類型:熱交換控制器應用:通用型，PCI Express? 內部開關:無電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝封裝/外殼:80-TQFP 供應商設備封裝:80-TQFP（12x12）包裝:托盤產品目錄頁面:1423 (CN2011-ZH PDF)
LTC4245IG#TRPBF	功能描述:IC CNTRLR HOT SWAP 36-SSOP RoHS:是類別:集成電路 (IC) >> PMIC - 熱交換系列:- 產品培訓模塊:Obsolescence Mitigation Program 標準包裝:100 系列:- 類型:熱插拔開關應用:通用內部開關:是電流限制:可調電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝封裝/外殼:10-WFDFN 裸露焊盤供應商設備封裝:10-TDFN-EP（3x3）包裝:管件
LTC4245IUHF	制造商:LINER 制造商全稱:Linear Technology 功能描述:Multiple Supply Hot Swap Controller with I2C Compatible Monitoring
LTC4245IUHF#PBF	功能描述:IC CNTRLR HOT SWAP 38-QFN RoHS:是類別:集成電路 (IC) >> PMIC - 熱交換系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:119 系列:- 類型:熱交換控制器應用:通用型，PCI Express? 內部開關:無電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝封裝/外殼:80-TQFP 供應商設備封裝:80-TQFP（12x12）包裝:托盤產品目錄頁面:1423 (CN2011-ZH PDF)

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型號：	LTC4245CUHF#PBF
廠商：	Linear Technology
文件頁數：	1/36頁
文件大小：	431K
描述：	IC CNTRLR HOT SWAP 38-QFN
標準包裝：	52
類型：	熱交換控制器
應用：	CompactPCI?
內部開關：	無
電源電壓：	3.3V，5V，12V
工作溫度：	0°C ~ 70°C
安裝類型：	表面貼裝
封裝/外殼：	38-WFQFN 裸露焊盤
供應商設備封裝：	38-QFN（5x7）
包裝：	管件

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