Transcription of LT4356-3 (Rev. D) - Analog Devices
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LT4356-3 (Rev. D) - Analog Devices
LT4356-3 . Surge Stopper with Fault Latchoff FEATURES DESCRIPTION. n Stops High Voltage Surges The LT 4356-3 surge stopper protects loads from high n Adjustable Output Clamp Voltage voltage transients. It regulates the output during an n Overcurrent Protection overvoltage event, such as load dump in automobiles, by n Wide Operation Range: 4V to 80V controlling the gate of an external N-channel MOSFET. The n Reverse Input Protection to 60V output is limited to a safe value thereby allowing the loads n Low 7 A Shutdown Current to continue functioning. The LT4356-3 also monitors the n Adjustable Latchoff Fault Timer voltage drop between the VCC and SNS pins to protect n Controls N-channel MOSFET against overcurrent faults. An internal amplifier limits n Shutdown Pin Withstands 60V to 100V the current sense voltage to 50mV. In either fault condi- n Fault Output Indication tion, a timer is started inversely proportional to MOSFET. n Auxiliary Amplifier for Level Detection Comparator or stress.
Back-to-back FETs can be used in lieu of a Schottky diode for reverse input protection, reducing voltage drop and power loss. The SHDN input turns off the part, including the auxiliary amplifier, and reduces the quiescent current to less than 7µA. n Automotive/Avionic Surge Protection n Hot Swap/Live Insertion
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