MAX5949BESA+T【PDF 1/18 页】IC CNTRLR HOT SWAP 8-SOIC

收藏本站

您好，
买卖IC网欢迎您。
请登录
免费注册

买卖IC网

Sheet目录43

[1页]2页 3页 4页 5页

General Description

The MAX5949A/MAX5949B are hot-swap controllers that

allow a circuit card to be safely hot plugged into a live

backplane. The MAX5949A/MAX5949B operate from

-20V to -80V and are well-suited for -48V power systems.

These devices are pin and function compatible with the

LT4250 and pin compatible with the LT1640.

The MAX5949A/MAX5949B provide a controlled turn-on

to circuit cards preventing glitches on the power-supply

rail and damage to board connectors and components.

The MAX5949A/MAX5949B provide undervoltage, over-

voltage, and overcurrent protection. These devices

ensure the input voltage is stable and within tolerance

before applying power to the load.

Both the MAX5949A and MAX5949B protect a system

against overcurrent and short-circuit conditions by turn-

ing off the external MOSFET in the event of a fault con-

dition. The MAX5949A/MAX5949B also provide

protection against input voltage steps. During an input

voltage step, the MAX5949A/MAX5949B limit the cur-

rent drawn by the load to a safe level without turning off

power to the load.

Both devices feature an open-drain power-good status

output (PWRGD for the MAX5949A or PWRGD for the

MAX5949B) that can be used to enable downstream

converters.

The MAX5949A/MAX5949B are available in an 8-pin SO

package. Both devices are specified for the extended

-40癈 to +85癈 temperature range.

Applications

Telecom Line Cards

Network Switches/Routers

Central-Office Line Cards

Server Line Cards

Base-Station Line Cards

Central-Office Switching

-48V Distributed Power Systems

Negative Power-Supply Controls

Features

o Allow Safe Board Insertion and Removal

from a Live -48V Backplane

o Pin and Function Compatible with LT4250L

(MAX5949A)

o Pin Compatible with LT1640L (MAX5949A)

o Pin and Function Compatible with LT4250H

(MAX5949B)

o Pin Compatible with LT1640H (MAX5949B)

o Circuit-Breaker Immunity to Input Voltage Steps

and Current Spikes

o Withstand -100V Input Transients with No

External Components

o Programmable Inrush and Short-Circuit Current

Limits

o Operate from -20V to -80V

o Programmable Overvoltage Protection

o Programmable Undervoltage Lockout

o Power Up into a Shorted Load

o Power-Good Control Output

-48V Hot-Swap Controllers

with External R

SENSE

________________________________________________________________ Maxim Integrated Products 1

GATE

SENSE

DRAIN

PWRGD

(PWRGD)

TOP VIEW

MAX5949A

MAX5949B

( ) FOR MAX5949B.

Pin Configuration

Ordering Information

19-3494; Rev 1; 8/11

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxims website at www.maxim-ic.com.

PART

TEMP RANGE

PIN-PACKAGE

MAX5949AESA+

-40癈 to +85癈

8 SO

MAX5949BESA+

-40癈 to +85癈

8 SO

Typical Operating Circuit and Selector Guide appear at end

of data sheet.

+Denotes a lead(Pb)-free/RoHS-compliant package.

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

采购需求

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

我的联系方式