fsw is the switching frequencyL is the inductor valueWhen selecting inductor, the inductor saturation current mustbe higher than the peak inductor current with enough margin(20% margin is recommended). The rating current of theinductor must be higher than the battery current.The inductor DC resistance value (DCR) affects theconduction loss of switching regulator, so low DCR inductoris recommended especially for high power application. Theconductor loss of inductor can be calculated roughly as