The CMTI ability of LM5113 is unkown in datasheet.
In some cases, there is not an isolator between the buck/LLC controller and the LM5113 driver, but there is an isolator there in cases where an microcontroller, such as PIC microcontrollers, is used.
I'm not sure whether there is a need to place an isolator between the microcontroller and the LM5113! Can anyone give a reasonalbe explanation!