I'm making an n64p and it's my 1st portable. I have most of what I need on the way from different places...patients is not one of my virtues. Everything but the batteries. Filthy batteries! but I may have a question her or there and instead of making a new topic I decided to make this. Now for my first question. I have a few power regulators from the TI website via free samples, and if i'm not mistakes these are switching regulators. If these are switching regulators do i need to use heat sinks? I also didn't know which regulator to use from them so i got 3 different samples and now i still don't know which one to use, they are pth08080wah, pth08080was, and pth08080waz. Any advice here would be nice. thanks.