I've been having a problem when performing a power up on a ADP1032ACPZ-2-R7.
When applying EN the output power VOUT1 start up nicely. FB1 looks OK. PWRGD also goes to high as expected. Then, after ca. 25 ms both FB1 and VOUT1 start oscillating. This goes on for about 2.4 seconds and then stops again and all signals are fine. During oscillation a buzzing sound is audible. Does anyone have a clue what could cause this behaviour?
I attached part of the schematic and the output waveform where
 yellow: PWRGD
 red: EN
 blue: FB1
 green: VOUT1