LT8550 for 3 phase application?

My customer is looking for a 4 phase circuit. 12V to 5V/100A. It’s a mini module inside ATE. So we suggest one phase of LT3741 with 3 phase of LT8550. Just make sure nothing wrong w it. The 4th phase of LT8550. How to remove this phase. I mean maybe all 4th phase gate can open. Current sense how to do? Please notice us all, thanks.