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DC/DC Converter Isolated / Non-Isolated?

Other Parts Discussed in Thread: DCP010512DB, DCR010505

Dear forum,

I'd like to design a regulated +/-5V  200 mA powersupply for powering an analog filter front-end for data acquisition. Therefore I would need a dc/dc converter like the DCP010512DB with subsequent REG1117-5 voltage regulators. However the 0V should be connected to GND - so an ISOLATED DC/DC converter doesn't make sense at all. I am not a big fan of buck/boost regulaturs with coils, mosfets etc. as to my experience they are extremely dependent on PCB layout and generating switching noises in the 20 kHz range is fairly easy with messy design. So I thought about something more traditional. Maybe some of you have an elegant  solution.

Yours,

Andreas