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AEM10941 Regulator Noise #2

Closed michaelshipman closed 1 year ago

michaelshipman commented 1 year ago

Significant noise was observed on the 1.8V power rail coming from the AEM10941 low-voltage regulator. Although V1.0 lacked decoupling capacitors on this rail a 1uF and 0.1uF capacitor were bodged on and significant electrical noise of about 300 mV was still observed.

I'd like to review the datasheet for this part and see if any layout guidelines need to be actioned on.

michaelshipman commented 1 year ago

Well there's a lot of decoupling on the RP2040 design, and I'm not even using the 1.8V regulator for V1.1.