When my Electron is in deep sleep [System.sleep(SLEEP_MODE_DEEP)] and waiting to be woken by the WKP pin the Lipo battery connection draws about 170uA. The current waveform consists of high pulses of current about 180mA (yes mA) that are very fast (about 6uS) and are spaced about 1.6ms apart. This accounts for the DC ammeter measurement of 170uA.
What is the cause of these pulses and how can I eliminate them? I’d like a sleep current below 5uA for my application.
I assume I need configure the PMIC to eliminate the pulses. I don’t see much information about how to do this. Any tips?