dc dc converter - Solution for "No drop" LDO

I have a very noisy 5V supply, the noise is in very low FQ around 1kHz.

From all the components In my project there is only one I have to provide with 10Hz - 2kHz clean 5V.

But because I need 5V and I only have 5V. I can not just use LDO. So my current idea is to use low noise LDO with boost converter:

• LT1109


• LT1761

^{simulate this circuit – Schematic created using CircuitLab}

I'm looking for integration solution and right now I have found only this one:

I found this one (http://cds.linear.com/docs/en/datasheet/3537fd.pdf) but Rejection Ration of this LDO is disporting + I would not have a way to hand solder it.

Any suggestion ?