For battery-operated electronic systems in automotive applications, battery supply remains on even when ignition is off, to support features like remote key entry and security which are required even in ignition-off state. To maximize battery life, there is a need for power protection solutions to provide robust reverse protection while maintaining low supply current.

In an automotive system, the low IQ during sleep mode/ignition off state is generally achieved by following approaches:

1. An external IGN connection is commonly found in redundant supply input-based ECU designs. Such a design uses extra wiring to the ECU.
2. An internal control signal from micro controller is used to pull EN low to disable the device. If the digital and power sections of the design are far apart or on separate boards, this signal becomes prone to noise and unknown state, making the overall operation unreliable.

LM7472x-Q1 devices enable <35uA quiescent current without dependency on MCU EN control signal or an external signal through a wire, making the device more suitable in comparison.