TPS25985: Calculation tool and current limit application

Hi Team

My customer application is 12V and 54A continuous load current.

1. is it real Itrip? or it's Iocp.

I have calculated it by below equation 

I think the result is Iocp rather than I trip. I trip should be 2x Iocp.

2. if my customer I out is 54A. How much ILIM do you recommend?

Thanks for your help

BRs

Brian