Why do automotive airbag squib drivers support voltages up to 35 V?
The 12 V line in a car can briefly go up to 40 V when the battery is removed while the engine is running.
You would not want the airbags to deploy when a mechanic disconnects the battery after forgetting to turn the engine off.
So most of the car electronics that are powered from 12 V have to be able to cope with 35 V or more, at least for a short time.
More detailed information in for example this document from Texas Instruments, page 5 shows some &quot;nice&quot; curves of supply pulses, the actual voltages are listed elsewhere in the document. Car manufacturers need the chips they use to support (survive without damage) this. If your chip doesn't (survive these pulses) then car manufacturers aren't going to buy your chip.