I'm designing a shutdown circuit that switches off a SMPS regulator after a 10 second time interval.
This is a battery powered application and the battery voltage could be anywhere between 7-15V.
I've looked at capacitor circuits and 555 timers and it seems to me that their timing will be dependent on the input voltage supplied - is this correct?
I just need a very simple IC with a pin that goes high 10 seconds after a switch is pressed, where the timing is independent of the battery voltage.
Regulating the voltage is not an option - I already have a regulator in the circuit and I'm trying to switch it off!
Any suggestions would be greatly appreciated, thanks in advance!