ADP151ACPZ-1.8 exposed pad connection in adjustable output voltage operation mode

Hi all!
I want to get 3V output using ADP151ACPZ-1.8 in adjustable output voltage operation mode. 
My schematic is:

But I'm not sure about EPAD pin connection. Could I connect EPAD pin to PCB ground. Or I must connect it to GND pin  of ADP151?