Quote from Wooloomooloo on December 20, 2011, 09:10
Quote from nullstring on December 20, 2011, 07:36
Unfortunately, it looks like we're burning all the excess power when dropping from 5v to any of the other voltages..
Based on an older post (http://www.raspberrypi.org/for.....ostid-1936
) the RasPi itself appears to eat about 0.4W of power, which if all drawn from the 1.6V rail gets you about 250mA, resulting in the horrifying amount of about 0.85W of wasted power on the linear regulators. Which is certainly non-negligible for battery-powered applications, but not even yawn-worthy in any other context, 'mkay?
I don't disagree. (Although, I didn't check the math) Here's hoping that the 1v8 regulator doesn't sink my current.
The thing I am confused about is that Gert mentioned that there was a buck regulator for one of the lower voltage on chip(1v3 or 1v5 or something?).
While I am thankful to Liz for supplying the scematic, we still don't know what each rail is connected to.. or how much current each rail will use. Still plenty of unknowns.