choosing power sully switcher

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My question is about how i choose my voltage regulator for fpga after i know what my current and voltages .

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What is the external voltage that you will creating the power supplies from?

Typically you would use a switch-mode power-supply (SMPS) for conversion of the input supply (say 12V) to a lower voltage, eg., 3.3V for I/O, or say 1.0V for a core voltage. For lower current rails, linear regulators can be used.

For each FPGA, Altera typically has a power supply design guideline. Look on the page where you can download the handbook. At the top of the page are links to the pin outs and configuration guidelines.

Cheers,

Dave