ipod 3.3v out

hi all?
as we know ,iphone/ipod touch dock connector 18-pin has 3.3V output ,
but while iphone is sleeping ,the power is 0,
how can I get continue power from iphone/ipod touch ,even iphone is sleeping ? :o :o

And this relates to Arduino in what way?

Lefty

maybe he wants to power a 3.3volt arduino from an ipod

Maybe, just asking. It's hard to respond to these kinds of questions without some context or backround.

Lefty

yes ,I want get power for arduino from my ipod ,
who have idea?