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Altera_Forum
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17 years ago

Power supply requirements for Cyclone III

I'm looking for information on what the power supply requirements are for Cyclone III devices. The starter kit evaluation board has 5 different regulators at 1.2V, 1.25V, 1.8V, 2.5V and 3.3V. I wa...
Altera_Forum's avatar
Altera_Forum
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17 years ago

1.2V core supply and 2.5V VCCA are required, others are optional, depending on your application. So if you intend to use 3.3V VCCIO, you need 3 regulators. The VCCA current requirement is low however, a tiny SOT23 regulator is typically sufficient. Even a silicon diode from 3.3V can do in some cases.