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Altera_Forum's avatar
Altera_Forum
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12 years ago

DC-DC converter in Power Supply

I have a query :D, acording to the theory, the dc-dc converter are noisy, and i've just checked reference design for FPGA of Altera and Xilinx, They use dc-dc converter, but how we can avoid the nois...
Altera_Forum's avatar
Altera_Forum
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12 years ago

There are different kinds of DC/DC converters out there, like linear and switching. Linear a real quiet, but typically pretty low current. Switchers can deliver more current, but generate more noise. It depends on your requirements. There are also some pretty low noise switchers out there, like TI's (formally National) Simple Switchers, I think those can get you anywhere from 1A - 10A. I've used them in a past design with an A2GX, they worked out well, and are pretty easy to use. There are similar products from Linear (uModules), Intersil, etc. The datasheets will give you the typical noise output.