LT4356MP-1/LT4356MP-2
Surge Stopper
FEATURES DESCRIPTION Stops High Voltage Surges
Adjustable Output Clamp Voltage
Overcurrent Protection
Wide Operation Range: 4V to 80V
Reverse Input Protection to –60V
Low 7µA Shutdown Current, LT4356-1
Adjustable Fault Timer
Controls N-Channel MOSFET
Shutdown Pin Withstands –60V to 100V
Fault Output Indication
Guaranteed Operation –55°C to 125°C
Auxiliary Amplifier for Level Detection Comparator or
Linear Regulator Controller
n Available in 10-Pin MSOP or 16-Pin SO Packages The LT®4356 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 LT4356MP 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 …