LOW noise amplifier power supply requirments.

[IdiotFromBeerSheva]

Dear friends,

I am trying to design a power supply for this LOW NOISE AMPLIFIER. Everyone is saying that this LNA requires a separate power supply that is not connected to any other load but this LNA.
This is my LNA:
https://www.skyworksinc.com/-/media/...E12F665D2E.pdf.

Do you have actual numbers, reference design or any other document that discusses this issue?

Thank you.

[qdrives]

Any switching device will draw varying currents from a power supply. That in turn will be seen as noise in the output. The amount that gets to the output is defined by the PSRR.
Now you add a dedicated power supply for this LNA, but if it bad in noise, it will be no better than sharing it with other devices.

Best to read and watch a lot of Steve Sandler documents on power supplies. Low noise power supplies and flat impedance.

[robertferanec]

In these cases I normally use a small LDO to power critical analogue chip / component. But, I am not an expert for sensitive or analogue circuits.

[IdiotFromBeerSheva]

Thank you friends. I think I will use Robert's advice.