In working with the P1 in a low power application the datasheet says the deep sleep current is 80uA typical to 100uA max. I have been trying to measure the deep sleep current of my product but was getting lower readings from a uCurrent. I figured I was doing something wrong but then found the following statement made in Managing power for a solar / battery powered core about the deep sleep current datasheet value.
This is based on the P1 reference design which uses the same SMSP as the Photon. Keep in mind you can achieve even lower numbers if you pick a SMPS with super low quiescent current.
I want to confirm that the P1 datasheet is stating the deep sleep current value as the P1 standby current PLUS the specific Richtek SMPS used in the Photon. The Richtek RT8008 has a quiescent current of 50uA typical. Does that mean the P1 itself really has a typical deep sleep current closer to 30uA? If so it’s kind of confusing to include an external part’s Q current as part of a deep sleep current value.