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Altera_Forum
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18 years ago

Cyclone III using 3.3V power supply

Hi there, my embedded system is based on a Cyclone III powered using an external 3.3V power supply. I already found the solution used in DK-DEV-3C120N to drive 1.2V (core) and 2.5V (PLLs) using...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

For 500 mA from 3.3V, a LT1963A in DD-Pack could be used, a synchronous switcher would give lower power dissipation. All major manufacturers have suitable devices, I have used TI TPS62040 previously, see appended circuit.