MAX5943AEEE+

更新时间： 2024-11-19 13:10:39

品牌	Logo	应用领域
美信 - MAXIM		开关控制器
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20页	930K
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MAX5943AEEE+ 数据手册

19-3378; Rev 0; 8/04

FireWire Current Limiter and Low-Drop

ORing Switch Controller

General Description

Features

♦ Provides Safe Hot Swap for 7.5V to 37V Power

The MAX5943 is a fully integrated power-management

IC for FireWire applications. This device controls two

Supplies

external power n-channel MOSFETs to regulate current

from the input power supply to the load and performs

low-voltage-drop, power-supply ORing. The MAX5943

operates over a 7.5V to 37V input range and provides

inrush and output current limit in addition to a diode

ORing function suitable for FireWire applications.

♦ Low-Drop Power ORing with Ultra-Fast Turn-Off

♦ Programmable Active Current Limit (MAX5943A)

♦ Programmable Circuit Breaker

(MAX5943B–MAX5943E)

The MAX5943 allows the safe insertion and removal of

FireWire peripherals into a live FireWire port by providing

inrush current control and an output current-limiting func-

tion. The ORing feature provides a very efficient way to

protect the FireWire port when connected to another

FireWire peripheral that sources a higher voltage. By turn-

ing off both external MOSFETS, the MAX5943 provides a

true bidirectional load disconnect. A low-current shut-

down mode disables the MAX5943, resulting in less than

10µA supply current. A pin-selectable input allows

latched or autoretry fault management after a fault.

♦ ±5% Current-Limit Sensing Accuracy

♦ Programmable Current-Limit/Circuit-Breaker

Timeout

♦ Fast Current-Limit Response to Output Short-

Circuit Conditions (MAX5943A)

♦ Drives External N-Channel Power MOSFETs

♦ Overcurrent Fault Status Output

♦ Latched or Autoretry Overcurrent Fault

Management

The MAX5943A features a current-limit function that

actively limits the current drawn by the load with a pro-

grammable timeout. The MAX5943B–MAX5943E do not

actively limit the load current but provide a circuit-breaker

function. See the Selector Guide for the default and pro-

grammable circuit-breaker timeouts.

♦ 10µA Shutdown Current

♦ ON/OFF Control Allows Undervoltage Lockout

Programming

♦ Fast Load Disconnect Control Through ON Input

The MAX5943 operates over the -40°C to +85°C extended

temperature range and is available in a 16-pin QSOP

package.

Ordering Information

PART

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

16 QSOP

MAX5943AEEE

MAX5943BEEE

MAX5943CEEE

MAX5943DEEE

MAX5943EEEE

Applications

16 QSOP

FireWire Desktop/Notebook Port

FireWire Peripheral Device Current Limit

FireWire Hub

16 QSOP

Hot Swap

Pin Configuration

TOP VIEW

16 IN

FAULT

TIM

15 SENSE

14 GATE1

ILIM

MAX5943

13 N.C.

12 GATE2

11 OUT

10 N.C.

LATCH

OR_ADJ

N.C.

Typical Operating Circuit and Selector Guide appear at end

of data sheet.

ONQ1

GND

QSOP

FireWire is a registered trademark of Apple Computers, Inc.

________________________________________________________________ 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...20

中文翻译

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MAX5943AEEE+ 替代型号

型号	品牌	替代类型	描述	数据表
MAX5943AEEE+T	MAXIM	完全替代	暂无描述
MAX5943AEEE	MAXIM	完全替代	FireWire Current Limiter and Low-Drop ORing Switch Controller
MAX5943AEEE-T	MAXIM	类似代替	Power Supply Support Circuit, Adjustable, 1 Channel, BICMOS, PDSO16, 0.150 INCH, 0.025 INC

与MAX5943AEEE+相关器件

型号	品牌	获取价格	描述	数据表
MAX5943AEEE+T	MAXIM	获取价格	暂无描述
MAX5943AEEE-T	MAXIM	获取价格	Power Supply Support Circuit, Adjustable, 1 Channel, BICMOS, PDSO16, 0.150 INCH, 0.025 INC
MAX5943BEEE	MAXIM	获取价格	FireWire Current Limiter and Low-Drop ORing Switch Controller
MAX5943BEEE+	ROCHESTER	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, 0.150 INCH, 0.025 INCH PITCH, ROHS COMPLIANT,
MAX5943BEEE+	MAXIM	获取价格	Power Supply Support Circuit, Adjustable, 1 Channel, BICMOS, PDSO16, 0.150 INCH, 0.025 INC
MAX5943BEEE+T	MAXIM	获取价格	Power Supply Support Circuit, Adjustable, 1 Channel, BICMOS, PDSO16, 0.150 INCH, 0.025 INC
MAX5943BEEE-T	MAXIM	获取价格	Power Supply Support Circuit, Adjustable, 1 Channel, BICMOS, PDSO16, 0.150 INCH, 0.025 INC
MAX5943CEEE	MAXIM	获取价格	FireWire Current Limiter and Low-Drop ORing Switch Controller
MAX5943CEEE+T	MAXIM	获取价格	Power Supply Support Circuit, Adjustable, 1 Channel, BICMOS, PDSO16, 0.150 INCH, 0.025 INC
MAX5943DEEE	MAXIM	获取价格	FireWire Current Limiter and Low-Drop ORing Switch Controller

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