LT4356HDE-3#PBF

LT4356-3 is a surge stopper protects loads from high voltage transients. It regulates the output during an overvoltage event, such as load dump in automobiles, by controlling the gate of an external N-channel MOSFET. The output is limited to a safe value thereby allowing the loads to continue functioning. This device also monitors the voltage drop between the VCC and SNS pins to protect against overcurrent faults. An internal amplifier limits the current sense voltage to 50mV. In either fault condition, a timer is started inversely proportional to MOSFET stress. If the timer expires, the FLT pin pulls low to warn of an impending power down. If the condition persists, the MOSFET is turned off, until the SHDN pin pulls low momentarily. It is widely used in application such as automotive/avionic surge protection, hot swap/live insertion, high side switch for battery powered systems etc.

• Stops high voltage surges
• Adjustable output clamp voltage
• Overcurrent protection
• Wide operation range is 4V to 80V
• Reverse input protection to -60V, supply current is 7µA typical
• Low 7µA shutdown current
• Adjustable latchoff fault timer, controls N-channel MOSFET
• Shutdown pin withstands -60V to 100V, fault output indication
• Operating temperature is -40°C to 125°C
• Package style is 12-lead plastic DFN

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party