I‘m trying to get -12v output by TPS7A3001 but my output is not stable. Some times it outputs -12V （much times it can keep less than 2 second）but some times it drops to -4V or lower from -12V and constantly changing.
This is my PCB layout,U17 is the TPS7A3001
Q:Is there any mistakes in my design？How can I slove it？
Thanks for your help。