LTC4381HDKE-2#PBF

LTC®4381 is a low quiescent current eFuse with surge protection. It provides integrated solution for low quiescent current eFuse with an internal 9mohm N-channel MOSFET. Overvoltage protection is provided by clamping the gate voltage of an internal 9mohm N-channel MOSFET to limit the output voltage to a safe value during overvoltage events such as load dump in automobiles. Overcurrent protection is also provided. An internal multiplier generates a TMR pin current proportional to VDS and ID, so that operating time in both overcurrent and overvoltage conditions is limited in accordance with MOSFET stress. The GATE pin can drive back-to-back MOSFETs for reverse input protection, eliminating the voltage drop and dissipation of a Schottky diode solution. Typical applications are automotive 12V, 24V and 48V system, avionic/industrial surge protection, hot swap/live insertion, high side switch for battery powered systems, automotive load dump protection.

• No input TVS needed
• Low 6µA operating current permits use in always-on and battery powered applications
• Guaranteed safe operating area is 20ms at 70V, 1A
• Low quiescent current is 6µA operating
• Operates through automobile cold crank
• Operating voltage range from 4 to 80V at TA = 25°C. VCC = OUT = SNS = DRN = 12V
• Reverse input protection to –60V, adjustable turn-on threshold
• Adjustable fault timer with MOSFET stress acceleration
• 32-lead plastic DFN (7mm × 5mm) package
• Temperature rating range from -40°C to 125°C

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