Tiny ultra clean PSU schematic needed

[neazoi]

Hello,
i have a nice ERA BV030-6935.0 L 50/60Hz mains transformer that outputs 2x6V (I think it can be connected in series for 1x12v. at 6v it outputs 333mA and has a fuse at 400mA.

I need a schematic for a suitable low power PSU, to use it for more serious RF use, so it has to be very clean and low noise.
These linear regulators are noisy and have a high drop out.

If a battery is considered the lower noise PSU, then charging a bank of AA Ni-MH using this transformer and use the power of the batteries, would be an acceptable solution for me. The same applies to supercaps, as I have two 400F at 2.7V ones.

Any ideas would be appreciated.

 

[schmitt trigger]

When you are talking about linear regs being noisy, what frequency band interests you? How many dB of attenuation do you require in that band?

Modern linear regulators have a humongous amount of attenuation for frequencies below 120 Hz. Even the lowly 78xx-series regulators have almost 80 dB rejection at those frequencies.
Higher frequencies for these regulators is another matter.

But if you require 120 dB at powerline frequencies, and 80 dB at 1 Mhz, I would use a LT3042. It also has a dropout of 350 mV while supplying 200 mA.

 

[neazoi]

When you are talking about linear regs being noisy, what frequency band interests you? How many dB of attenuation do you require in that band?

Modern linear regulators have a humongous amount of attenuation for frequencies below 120 Hz. Even the lowly 78xx-series regulators have almost 80 dB rejection at those frequencies.
Higher frequencies for these regulators is another matter.

But if you require 120 dB at powerline frequencies, and 80 dB at 1 Mhz, I would use a LT3042. It also has a dropout of 350 mV while supplying 200 mA.

LT3042 seems good.
I have to parallel two to get the maximum current of the transformer (333mA).
I like the simple circuit on page 22 of the datasheet (low noise cc/cv lab power supply), but how I can do this with paralleled devices?
Or is it equally low noise to use the circuits on page 26?