Quiescent current during deep sleep

How much current is used during deep sleep including regulator?
I remember reading somewhere that…
below a certain voltage the current increases during sleep on Adafruit April board?
What is the voltage?
What is the current below it?

It’s in the spec sheet - for the imp, 6uA.

PSU losses will vary design to design, I think april is about 20uA, but on Nora it’s ~1uA when the imp is asleep because the DCDC is disabled.

I think on April the DCDC current increases as the voltage drops below ~3.5v, to (as I remember) a couple of hundred microamps.

Great answer thanks!

I measured on April:
9ma powersave
24ua deep sleep
65ma average during booting