LT4356MPMS-3#PBF

LT4356MPMS-3#PBF is a surge stopper with fault latch off. It protects loads from high voltage transients. It regulates the output during an overvoltage event, such as a 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 LT4356-3 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 active low FLT pin pulls low to warn of an impending power down. If the condition persists, the MOSFET is turned off, until the active low SHDN pin pulls low momentarily. Application includes automotive /avionic surge protection, Hot Swap™/live insertion, high side switch for battery powered systems.

• Stops high voltage surges, adjustable output clamp voltage, overcurrent protection
• Operating voltage range from 4 to 80V, reverse input protection to -60V
• VCC supply current is 7µA typ (active low VSHDN = 0V, IN+ = 1.3V)
• Adjustable latch off fault timer, controls N-channel MOSFET, fault output indication
• Shutdown pin withstands range from -60V to 100V
• Auxiliary amplifier for level detection comparator or linear regulator controller
• FB pin servo voltage range from 1.225 to 1.275V (VGATE = 12V, VOUT = 12V)
• SNS pin input current range from 5 to 22µA (VSNS = VCC = 12V to 48V)
• TMR pin pull-down current range from 1.5 to 2.7µA (VTMR = 1V, VFB = 1V, ΔVSNS = 0V)
• 10 lead plastic MSOP package, operating temperature range from -55°C to 125°C

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