Electronics > Projects, Designs, and Technical Stuff
ultra low noise power supply design
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GigaJoe:
guess it related to all voltage regulators ....

That puzzled me, is a "1µV" noise ...   Assuming Vref bandgap,  1.25V and noise 0.3 µVpp,  sooo ... 12V would be 3 µVpp .... I'm right ?
ogden:

--- Quote from: GigaJoe on October 17, 2018, 04:57:52 pm ---That puzzled me, is a "1µV" noise ...   Assuming Vref bandgap,  1.25V and noise 0.3 µVpp,  sooo ... 12V would be 3 µVpp .... I'm right ?

--- End quote ---

Thing is that LT3045 does not have voltage reference ;)
Conrad Hoffman:
"Noise" is meaningless unless you assign a frequency bandwidth. That defines the problem well enough that you can talk about solutions. Then you have issues like popcorn noise that are more related to device type and may need selection to get what you need.
Gerhard_dk4xp:
The industry standard BW is 0.1 to 10 Hz or 10Hz to 100 KHz.

<      https://www.flickr.com/photos/137684711@N07/24070698809/in/album-72157662535945536/         >

clearly shows the huge 40 to 50 dB advantage of the LT3042/3045 against the rest.
Conrad Hoffman:
No question that's an impressive part just about everywhere, but one still needs to understand what their requirements for their project are. IMO, it's probably far better than the OP's needs and better than most people could build from scratch.
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