MAX5949

更新时间： 2024-11-22 22:55:19

品牌	Logo	应用领域
美信 - MAXIM		控制器
页数	文件大小	规格书
18页	270K
描述
-48V Hot-Swap Controllers with External RSENSE

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数据手册

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MAX5949 数据手册

19-3494; Rev 0; 11/04

-48V Hot-Swap Controllers

with External R

SENSE

General Description

Features

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.

♦ Allow Safe Board Insertion and Removal

from a Live -48V Backplane

♦ Pin and Function Compatible with LT4250L

(MAX5949A)

♦ Pin Compatible with LT1640L (MAX5949A)

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.

♦ Pin and Function Compatible with LT4250H

(MAX5949B)

♦ Pin Compatible with LT1640H (MAX5949B)

♦ Circuit-Breaker Immunity to Input Voltage Steps

and Current Spikes

♦ Withstand -100V Input Transients with No

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.

External Components

♦ Programmable Inrush and Short-Circuit Current

Limits

♦ Operate from -20V to -80V

♦ Programmable Overvoltage Protection

♦ Programmable Undervoltage Lockout

♦ Power Up into a Shorted Load

♦ Power-Good Control Output

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°C to +85°C temperature range.

Ordering Information

Applications

Telecom Line Cards

PART

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

8 SO

Network Switches/Routers

Central-Office Line Cards

Server Line Cards

MAX5949AESA

MAX5949BESA

8 SO

Pin Configuration

Base-Station Line Cards

Central-Office Switching

-48V Distributed Power Systems

Negative Power-Supply Controls

TOP VIEW

PWRGD

(PWRGD)

DRAIN

GATE

MAX5949A

MAX5949B

Typical Operating Circuit and Selector Guide appear at end

of data sheet.

SENSE

( ) FOR MAX5949B.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...18

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与MAX5949相关器件

型号	品牌	获取价格	描述	数据表
MAX5949A	MAXIM	获取价格	-48V Hot-Swap Controllers with External RSENSE
MAX5949A_11	MAXIM	获取价格	-48V Hot-Swap Controllers with External RSENSE
MAX5949AESA	MAXIM	获取价格	-48V Hot-Swap Controllers with External RSENSE
MAX5949AESA+	MAXIM	获取价格	-48V Hot-Swap Controllers with External RSENSE
MAX5949AESA+T	MAXIM	获取价格	暂无描述
MAX5949AESA-T	MAXIM	获取价格	暂无描述
MAX5949BESA	MAXIM	获取价格	-48V Hot-Swap Controllers with External RSENSE
MAX5949BESA+	MAXIM	获取价格	-48V Hot-Swap Controllers with External RSENSE
MAX5949BESA+T	MAXIM	获取价格	暂无描述
MAX5949BESA-T	MAXIM	获取价格	Power Supply Support Circuit, Adjustable, 1 Channel, BICMOS, PDSO8, 0.150 INCH, MS-012AA,

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