65V ORing controller with 27 µA standby — the always-on rail spec
The Texas Instruments LM74720QDRRRQ1 is an automotive-grade N+1 ORing controller that drives an external N-Channel MOSFET to replace a Schottky diode in redundant power supply architectures. Quiescent current is 27 µA — low enough to leave the controller biased on the battery line in an always-on ECU without draining the pack during key-off. The 2.5A peak gate drive turns the external FET on fast enough to hold the output within a few hundred millivolts of the input during a supply switchover. The 1:1 input-to-output ratio means one controller manages one ORing path; a typical N+1 system stacks multiple LM74720QDRRRQ1 devices, each driving its own FET, to combine paralleled supplies.
Automotive temperature range and wettable flank package
No internal switches — the controller is a gate-drive and fault-management IC; the power path is the external N-Channel FET you select based on the load current and thermal budget. This keeps the controller cool and lets you scale the FET for a 10A or 100A rail without changing the controller.