Customer observed 1.4KHz ripple at output.
This was tested with clean input supply. TPS7A91 seems to be the one generating the 1.4KHz.
They tried changing capacitor values:
Pin 8 to Gnd: Tried 10nF & 10uF
Pin 1 to Pin 3 (FB): Tried 10nF & 10uF.
Both cases did not help to reduce the ripple. Is there any other recommendation for reducing output ripple?