Yes, this is an important note! In tests, I’ve found that current with Led Off is around 600uA (at 5V).
Driving the WS at 5V actually requires a level shifter between the XIAO and the WS, which is a bit of a hassle.
Correct. That is “normal practice” for mosfet switches…
Depending on the project and power requirements I tend to use a “smart” switch, viz RT9742… low(ish) cost but with built in protection and 100nA standby current.
@grobasoz @msfujino thank you both for the input! I got some P-channel mosfets and they fixed the issue for me. I’m now seeing 2.4uA in deep sleep.
With the LED disabled and connected to a device over BLE, I am seeing about 390uA - does that sound reasonable or might there be more power savings on the table?
The LED seems to be working fine off 3.3V, could running it off the 3v3 pin lead to any issues down the line on either the LED side or nRF side?
Excellent news! I have had the WS2812’s running fine with a 3V3 supply but that is “out of specified parameters” as mentioned by @msfujino.
@msfujino will also be able to answer the standby power consumption 
The following links may be helpful.
’ System_ON_Sleep of XIAO BLE - #31 by msfujino
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