LM25119 output current design

Hi Winnie

Since LM25119 is a controller(not a regulator) , the maximum current capability is not limited by the controller itself, but it is limited by the quality of thermal design.
From the controller point of view, customers should use small value current resistor (which is noise sensitive) to handle 20A.

Regards,
EL

is it means if have proper MOSFET and inductor selection, the controller can support this? but is there have any thermal or other concern about controller that will restrict the output current design?

Hi Winnie.
Except current sense, all depends on external component selection and the quality of thermal design.
Regards,
EL