Hi,
I am using TPS55386PWP dual supply to have 3.3V and 16V outputs. Please check PCB file and schematic provide yours valuable feedback if any changes required in PCB or Schematic.
1. Routed 2nd layer power under TPS55386 and 3rd layer gnd.
Link : https://drive.google.com/file/d/1c3lLJSS3UAcK_ocmhGwlRM8mRQR_ii_t/view?usp=sharing
