hello
I am using the TPS53317A VR in a tracking configuration.
I have a digital Potentiometer that is connected between Vref pin and Refin pin and controls the voltage divider between those pins.
when I change the voltage in the Refin pin to approximately 2v the power good and the output drops to zero.
if I power the circuit in this condition (refin = 2v) than it works fine
if the change is to 1.9v (instead of 2v) - than it works fine in most cases (sometimes still fails)
what can cause this behavior?