Dear Forum,
I am using the TPS82130SIL controller to step-down from 12V (V_HB_STBY) to 5V. After power up, the controller operates for a few minutes as expected, Vout=5V, and then the output changes to ~1V. I checked PG when the controller output is at 1V. It shows PG high, indicating that it is in regulation. I know that the controller is operating I have reduced the nominal voltage of the feed-back resistors, R54 and R55, to increase the current into the FB node. It is more stable but, after a longer period of time, the controller fails again with its output changing.
Regards,
David