one more time. measured some more and now i'm pretty sure the 5V regulator does something weird. that pesky 2x2mm QFN package really hates too much paste...
@steph it's not *that* bad, and you can make the switchnode smaller with a different layout too. also the LDO i have on it has something like 95dB PSRR and the current sense amps 120dB CMRR, noise won't be the issue. except ADC noise, because that's really the weakest part.
@steph hey, it basically just comes down to my bad pasting skills. de-soldering and placing it again is easy. even with that really cheap hot air and pre-heater.
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