LTC4364 Surge blocker with ideal diode controller protects loads from high voltage transients. It limits and regulates the output during an overvoltage event, such as a load dump in an automobile, by controlling the voltage drop of an external n-channel MOSfet-pass device.
Pin arrangement
The LTC4364 also includes a timing, current limiting circuit breaker. In fault conditions, the adjustable fault timer must expire before the pass device is shut down. The LTC4364-1 shuts down the transfer device, while the LTC4364-2 restarts automatically after a delay.
The LTC4364 accurately monitors input power overvoltage (OV) and undervoltage (UV) conditions. External MOSFeTs are held at undervoltage and automatic retry is disabled at overvoltage. The integrated ideal diode controller drives a second MOSFET in place of the Schottky diode for reverse input protection and output voltage holding.
Typical application
The LTC4364 controls the forward voltage drop of the MOSFET and minimizes reverse current transients in the event of power failure, outage, or short input.
Block diagram
Features
● Wide operating voltage range :4V to 80V
● Withstand surges in excess of 80V with VCC pliers
● The output clamp voltage is adjustable
● The ideal diode controller keeps the output voltage input limited during the period
● Reverse input protection to -40V
● Reverse output protection to -20V
● Overcurrent protection
● 12V power down current is 10μA lower
● Adjustable fault timer
● Retry Duty cycle 0.1% in case of failure (LTC4364-2)
● Available in 4mm x 3mm 14 lead DFN, 16 lead MSOP,And 16 lead SO package
● The AEC-Q100 is suitable for automotive applications
Applications
● Automotive/avionics lightning protection
● Hot swap/Hot swap
● Redundant power supply ring
● Output port protection
