LTC4364HS-2#PBF

LTC4364-2 surge stopper with ideal diode controller protects loads from high voltage transients. It limits and regulates the output during an overvoltage event, such as load dump in automobiles, by controlling the voltage drop across an external N-channel MOSFET pass device. The LTC4364-2 also includes a timed, current limited circuit breaker. In a fault condition, an adjustable fault timer must expire before the pass device is turned off. It precisely monitors the input supply for overvoltage (OV) and undervoltage (UV) conditions. An integrated ideal diode controller drives a second MOSFET to replace a Schottky diode for reverse input protection and output voltage holdup. It controls the forward voltage drop across the MOSFET and minimizes reverse current transients upon power source failure, brownout or input short. Typical applications are automotive/avionic surge protection, hot swap/live insertion, redundant supply ORing, output port protection.

• External MOSFET is held off in undervoltage and auto-retry is disabled in overvoltage
• Wide operating voltage range from 4V to 80V at TA=25°C. VCC=12V
• Withstands surges over 80V with VCC clamp, automatically restarts after a delay
• Ideal diode controller holds up output voltage during input brownouts
• Supply current is 370µA typical VCC=SOURCE=SENSE=OUT=12V, no fault, TA=25°C
• Supply current in shutdown is 10μA typical at TA=25°C, VCC=12V
• Adjustable fault timer, 0.1% retry duty cycle during faults
• Reverse input protection to –40V, reverse output protection to –20V
• 16-lead plastic SO package
• –40°C to 125°C temperature rating

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