Using TI's "power designer", I've taken their 33630A and designed it for a 5v output. My actual circuit has a slightly different value for the divider to raise the voltage up to about 5.2v, otherwise it matches this design:
..and here's my design. I've reviewed it a few times.
My circuit, and the PCB from it, are on easyeda. After assembling the circuit, my output is right around 1 volt and the chip is overheating. I can't figure out why! I've checked for short circuits, and I've done in-circuit tests to ensure the passives are approximately correct.
As a wanna-be-EE, I don't know where to go next. I have a low-end 'scope and a high-end meter. I'm not using this attached to anything (e.g., it isn't actually connected to a Raspberry Pi), and I'm supplying it with 12-16v. I also removed LED1 so I could rule that part of the circuit out.