TPS5430: Noise Immunity on Enable Pin

Part Number: TPS5430

Tool/software:

How to improve the noise immunity on Enable pin once it's not connecting to ext. component as floating? In the UPS application, customer worried it has noise issue when it's in floating.

Also, could you offer the curve for ENA's current sourcing of 5uA versus temperature! 

Please help to comment. thanks. 

Regards

Brian