The LM74930-Q1 is an ideal diode controller with surge stopper functionality. The device can drive back-to-back external N-Channel MOSFETs connected in common source topology to realize low loss power path protection with short circuit, overcurrent with circuit breaker, overvoltage and undervoltage protection.

The wide input supply of 4 V to 65 V allows protection and control of 12-V and 24-V automotive battery powered ECUs. The device can withstand and protect the loads from negative supply voltages down to –65 V. With the first MOSFET in the power path the device allows load disconnect (ON and OFF control) using HGATE control. An integrated ideal diode controller (DGATE) drives a second MOSFET to replace a Schottky diode for reverse input protection and output voltage holdup. The device features an adjustable overvoltage protection feature. The LM74930-Q1 has a maximum input voltage rating of 65 V.

The device has integrated short-circuit and overcurrent protection with complete adjustability of thresholds and response time. The device offers adjustable overvoltage and undervoltage protection, providing robust load disconnect in case of voltage transient events. The fault pin FLT is pulled low in case overcurrent, short circuit, overvoltage or undervoltage fault condition is triggered.

LM74930-Q1 incorporates MODE pin to selectively enable or disable reverse current blocking functionality of ideal diode FET (Q2).

LM74930-Q1 features enable functionality. With the enable (EN) pin pulled low, the device enters into ultra low power mode by completely cutting off loads with typical current consumption of 2.5 μA.