I use the LM53603 to supply Vout=5V to my circuit. I would like to have the option to feed 5V in from a secondary source while the LM53603 input can be 12V or floating.
The datasheet says "Don't: Allow the output voltage to exceed the input voltage, nor go below ground."
What precautions do I need to take to make this work? Would a diode from Vout to Vin be sufficient? I would like to avoid a series diode at the regulator output.
Vin is supplied from a battery via a reverse polarity protection diode within the device, so shorting to ground should not be an issue.