[sdiy] A question about regulator noise figures

Tom Wiltshire tom at electricdruid.net
Tue Mar 16 00:57:28 CET 2021


Hi All,

I’ve been reading data sheets for linear regulators, and I’ve got a question.

Some regulators specific the output noise voltage from 10Hz to 100KHz as an RMS level, usually uV. However, the Microchip MCP1702 specifies an output noise figure as 8 uV/Hz. What does this mean? What’s the relationship between uV/Hz and RMS uV?

Here’s the datasheet:

https://4donline.ihs.com/images/VipMasterIC/IC/MCHP/MCHPS03366/MCHPS03366-1.pdf?hkey=6D3A4C79FDBF58556ACFDE234799DDF0

Thanks for any guidance!

Tom

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