ADP5091 > how to select minop resistor?

I haven't used this part myself; below is my best guess

after reading through the data sheet.

The MINOP pin is driven by a 2 microamp current source,

and the voltage of the MINOP pin is sensed to determine

minimum operating voltage of the harvested source as

seen at the Vin pin.

For example, consider Figure 45, one of the Typical

Application Circuits in the data sheet. The MINOP

resistor is 150k, so 150 kOhm * 2 microamp = 0.3V.

As noted in the footnote, the circuit is designed

for PV cells with open-circuit voltages in the

0.7-1.1V range. The designers apparently decided

that if the ambient light level is so low that

the voltage of the cell drops to 0.3V, it is best

to shut down.

For your own application, you would have to

determine the appropriate shut down voltage

given the energy source you are harvesting,

and then use V = IR to set the resistor value.

thank you for this clear description, I wish the DS was it.

And, sometimes it is easier that we think, I was confused and tried to get the source for 2uA... I was trying to connect it to Vref... and all got too complicated.

But, the way you list it :) it is nice and clear.

thank you!

wishing you a good day!