TPS61253: Automatically cutoff at 3 volts with voltage divider?

Hello,

I read that one can use a voltage divider hooked up to the EN pin to automatically disable it when my battery is at 3V. I am having trouble figuring out what resistors i will need for this application.

Could someone please advise me on what voltage divider resistors I should use, or if this in fact the best solution?

I don't want to drain the battery even lower after cutoff occurs with incorrect resistors that would allow too much current to flow into the EN pin. 

I am using the WEBENCH schematic. I have attached a picture for convenience sake.

Thanks so much!

Dillon