[Gdeaver]

Those are raw chips. Can you as a DIY project buy the BOM and make the boards? If you have boards made is the cost and time less than a COTS automotive power supply? There seams to be a void with small modules at about .5 amp and cheap and > 10 amp and expensive in the buck boost auto motive grade modules. I found a 12 volt 10amp module for 57$ singe output but nothing less till the low power stuff at 8$. If you are going to make your own, TI has some reference designs with everything figured out and ready to make. I think most teams would just want to buy the power supply and not get in to custom made power supplies.