I used generic TO220 style linear regulators for my linear SMPS replacement, had to trim the tabs a bit but they are rated for 1A and while they get warm seem OK.
As Jerry says the ADC_* lines need to be a little high to keep the processor happy.? I added a 220k in parallel with the 22k resister on the high side or use 20k/22k for the potential divider. Or whatever you have to get a voltage that's a little high.
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Running the 78M33 from the 5V line would reduce it's heat dissipation at the expense of increased dissipation in the 5V regulator.
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Chris, G5CTH
