The LTC4361 is a 2.5V to 5.5V overvoltage and overcurrent protection controller designed to safeguard low voltage, portable electronics from damaging input voltage transients and current surges. The LTC4361 utilizes a 2% accurate 5.8V overvoltage threshold to detect an overvoltage event and respond quickly to isolate the downstream components from the input. Overvoltage protection of up to 80V can be achieved with this simple IC/MOSFET solution without the need of additional external components at the input. In addition, the LTC4361 monitors voltage drop across a current sense resistor at the input of the circuit to protect against overcurrent faults.