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Altera_Forum's avatar
Altera_Forum
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12 years ago

Max V power - convert 5v to 1.8v and 3.3v

I'm looking for way to power Max V CPLD. I have have either +5v from game console or 3xAA (1.5v) battery. Max V needs 1.8v and I think 3.3v for programming. Does anyone know of such a DC to DC conver...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Yes. a Linear regulator would be advisable here. DC-DCs switch at high speed so as to produce say 500mA at 3.3V from 330mA at 5V.

If you can accept lower efficiency then a Low DropOut regulator (LDO) which will only ever give 500mA at 3.3V from 500mA at 5V.

LDOs will always be easier to implement, so should be concidered first, if you simply can't cope with the performance of a LDO, only then should you use a DC-DC.

mike