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24V Overvoltage Regulator Withstands 150V at VIN 28V Vehicle Application with Reverse Voltage Protection 4A, 12V Overvoltage Output Regulator 5V System Protected from ± 24V Power Supplies 5V System Protected from ±24V Power Supplies and Overcurrent 5V System Protected From 80V Overvoltage Complete 12V Automotive Undervoltage, Overvoltage and Reverse-Supply Protection Circuit Computer Voltage and Temperature Monitoring Overvoltage Regulator with 250V Surge Protection Overvoltage Regulator with Low Battery Detection and Output Keep Alive During Shutdown Protection from Overvoltage and Overcurrent Protection of USB Port from Overvoltage and Overcurrent SCR Crowbar
The LT4356 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. The LT4356 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. After a cool down period, the GATE pin pulls up turning on the MOSFET again.
