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How to use Enable feature for Step-Up Voltage Regulator U3V50AHV

Hi,

I’m trying to understand how to use the Enable feature for Adjustable 9-30V Step-Up Voltage Regulator U3V50AHV.
What does it mean to drive it low (under 0.7V)?
I’m trying to use a voltage splitter to split my Vin so that the board will stay sleeping when Vin is below 20V.
Is that possible?

Hi.

Driving the EN pin under 0.7V means that if a voltage below 0.7 is connected to that pin it will disable the regulator. Unfortunately, I do not think the enable threshold on that regulator is precise enough to make adding a low-voltage cutoff practical. If your application uses a microcontroller you might consider monitoring the input voltage through a voltage divider and then using the microcontroller to control the enable pin.

-Claire