Why the output current across a load in DC-DC buck converter is continuous

The output current across a load in a DC-DC buck converter is continuous because of the nature of the buck converter topology. In a buck converter, the input voltage is continuously switched at a high frequency and then filtered to produce a lower output voltage. The output current is controlled by the duty cycle of the switching signal, which determines the amount of time the input voltage is applied to the load. As a result, the output current flows through the load continuously, without any interruption or discontinuity. This is different from some other types of DC-DC converters, such as the boost converter, where the output current is discontinuous and flows in short pulses