LTC7130

Hi zhang

I would suggest you to use LTpowerCAD vII it will compute the need components for the ITH pin

Link for LTpowerCad:

www.analog.com/.../ltpowercad.html

Regards

Mikee

another question：can LTC7130‘s Differential Remote Sense  pin DIFFP and DIFFN connect to my cpu ball to tracking cpu ‘s power ball？

The DIFFP and DIFFN pins are only used to mitigate the effect of the voltage drop caused by long cable / routes.  

The DIFFP and DIFFN pins are only used to mitigate the effect of the voltage drop caused by long cable / routes.