PTH8000 and PTH8080?

So I'm in the process of finding a PTH8000 or PTH8080 step-down regulators for my n64p. Which one should I get? From what I've heard they do the EXACT SAME THING, but is there a difference? Either way, I can't seem to find the Dang thing... Could someone post me a link to them from Ti (or anywhere for that matter)?
Thanks.
 
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