I see EVM and I wonder if you directly use the DCR of the inductor-L4 as a current sampling loop?
please tell the function of R17、R18、C29、R9 beside L4.
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For really high-current implementations where the shunt value is less than 2mΩ, you can consider inductor DCR current sensing. Just put an RC across the inductor, where RC = L/Rdcr (pole and zero match). The sense cap is typically set at 100nF, so just choose the R accordingly. I can dig up some links on DCR current sensing if you decide to go this way.