The 'requirements' depend, in no small part, on what you intend to do with the FPGA. Altera can't publish numbers because they don't know what you have planned for it.
However, the do publish spreadsheets for various families - including MAX10 - to help you. Find them on the "
powerplay early power estimators (epe) and power analyzer (
https://www.altera.com/support/support-resources/operation-and-testing/power/pow-powerplay.html)" page. Download the spreadsheet, fill it in (play around with it) and it'll give you a pretty good idea what to expect.
Cheers,
Alex