Datasheet > LTC4381

LTC4381

更新时间： 2024-11-12 02:52:23

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
24页	2110K
描述
Low Quiescent Current Surge Stopper with 9mÎ© MOSFET

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中文翻译

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LTC4381 数据手册

LTC4381

Low Quiescent Current Surge

Stopper with 9mΩ MOSFET

FEATURES

DESCRIPTION

The LTC^®4381 is an integrated solution for low quiescent

current surge stopper applications that protect loads from

high voltage transients. Overvoltage protection is pro-

vided by clamping the gate voltage of an internal 9mΩ

N-channel MOSFET to limit the output voltage to a safe

value during overvoltage events such as load dump in

automobiles. The MOSFET safe operating area is pro-

duction tested and guaranteed for the stresses during

high voltage transients. Fixed output clamp voltages are

selectable for 12V and 24V/28V systems. For systems of

any voltage up to 80V, use the adjustable clamp versions.

Withstands Surge Voltages Up to 100V

Internal 9mΩ N-Channel MOSFET

Guaranteed Safe Operating Area: 20ms at 70V, 1A

Low Quiescent Current: 6µA Operating

Operates Through Automobile Cold Crank

Wide Operating Voltage Range: 4V to 72V

Overcurrent Protection

Selectable Internal 28.5V/47V or Adjustable Output

Clamp Voltage (Table 1)

Reverse Input Protection to –60V

Adjustable Turn-On Threshold

Adjustable Fault Timer with MOSFET Stress

Overcurrent protection is also provided. An internal mul-

Acceleration

Latchoff and Retry Options (Table 1)

tiplier generates a TMR pin current proportional to V

and I , so that operating time in both overcurrent and

Low Retry Duty Cycle During Faults (Table 1)

overvoltage conditions is limited in accordance with

MOSFET stress.

32-Lead DFN (7mm × 5mm) Package

The GATE pin can drive back-to-back MOSFETs for

reverse input protection, eliminating the voltage drop

and dissipation of a Schottky diode solution. A low 6µA

operating current permits use in always-on and battery

powered applications.

APPLICATIONS

Automotive 12V, 24V and 48V System

Avionic/Industrial Surge Protection

Hot Swap/Live Insertion

High Side Switch for Battery Powered Systems

All registered trademarks and trademarks are the property of their respective owners.

Automotive Load Dump Protection

TYPICAL APPLICATION

12V System with 100V/0.5A/400ms Load Dump Overvoltage Protection

12V, 0.5A with 100V Overvoltage Protection

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80mΩ

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10Ω

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FLT

33Ω

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Rev. 0

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