I'm actually trying to step 5V down to 3.0 - 3.6V. It's for a DVI to proprietary lcd panel connector. I originally tried two diodes, but they don't seem to be doing the trick. Maybe I'm using the wrong kind. The panel's voltage needs to stay in that range and the current will change depending on what's displaying on the panel. The backlighting is powered completely separately.

Thanks a bunch,
-Ryan.