In order to improve the signal integrity in wired connection evaluations, it is necessary to suppress the low frequency noise (switching noise) of a DC/DC converter.
The insertion loss of each filter condition is shown in the following. Due to the frequency characteristics of the insertion loss, it is effective to insert the LQW15CN series or BLM15PX121 immediately after the output LC, to suppress the switching noise (1MHz-10MHz) of a DC/DC converter.
The inductance value and capacitance of the output LC in this evaluation are assumed for a DC/DC converter with a switching frequency of 6MHz.