Immunity modeling and measurement of low-dropout linear regulator

This paper used the direct power injection method to obtain the conducted immunity of low-dropout linear regulator (LDO) under electromagnetic interference. And a cascade model of linear filters and Taylor series representation of nonlinear system are proposed for immunity simulation. In addition, the traditional modeling method was used to model the linear device on the test system. Finally the immunity simulation of LDO was carried out and the results show that the model in the 1 MHz-2 GHz range has a good fit between simulation and measurement.