There's a PCB design, so I have the Eagle files. These are with the 9V LDO, so that'll have to change.
I just now found these: http://www.digikey.com/product-detail/en/MEV3S1209SC/811-2121-5-ND/2126403 Possibly I could use two of them (one for Arduino+LCD and one for USB host) since they have a max current output of 330 mA. They look efficient, though.
Over 85%
