ADP7182AUJZ-2.5-R7

Hi,

     I am using this part in my design to get -2.5V but I am getting -4.2V.

The EN pin is connected to Vin. The input and output capacitors are Multilayer-ceramic 10uF one on each side. I applying -5V at Vin generated by LT1964ES5-5.

Can you please let me know what could be the issue? 

Thank you