I am developing an electronic circuit that will be installed in a car and get its power from the car battery. The circuit will use around 600mA. The device should be turned on when the car ignition is turned on. To protect the device against voltage transients and reverse battery connection I will use this power supply reference design from TI. I'm planning to only use the smart diode controller (LM74610) and the buck converter (LM53603) part of the design, and leave the supervisory circuit and the boost controller out of the design.
My plan was to connect the car ACC wire directly to the enable pin (EN) of the buck converter, so that my device gets power when the ignition is turned on. My question is whether I also have to protect the EN pin from voltage transients and reverse battery connection?
If yes, do I need the full transient and reverse polarity section of the reference design in front of the EN pin or is there an easier way to safely detect voltage in the ACC wire?