Hello all contributors,
I need to produce two power supplies with one (1.8V) which needs to always stay upper than {the other one (1.2V) minus 200mV}, until both of them goes below 300mV. This, even in case of uncontrolled primary power shutdown.
I thought about using two TPS84610, one used in tracking mode, as I'll use this component for other supplies on the board. Fortunately, I tried this with EVMs: This works well at startup, but when removing the input power, tracking doesn't work anymore, there is a trip point where the 2 output crosses over.This can be seen even both supplies unloaded.
What do you suggest to overcome this issue?
Regards,
Thibault