Other Parts Discussed in Thread: SN74AHC1G09-Q1,
The absolute maximum rating for the PWM input is -0.3 to 45 V. I would assume that there is a reverse bias diode on the inputs, and the limit of -0.3 V is there to stop there being an current in that diode.
Many other ICs with the same lower voltage limit of around -0.3 V have datasheets that say that larger voltages won't matter as long as the current is limited to some low value. For example, the SN74AHC1G09-Q1 has a limit of -0.5 V and -20 mA, and it says "The input and output voltage ratings may be exceeded if the input and output current ratings are observed."
The circuit that we are looking to use would result in the PWM input being driven negative at about 1 mA during a reverse battery connection. The power to SUPPLY and IN will be protected with a diode.
Would that current of 1 mA damage the TPS92611-Q1?
