The TPS40210 has a minimum off time of approximately 200 ns and a minimum on time of 300 ns. These twoconstraints place limitations on the operating frequency that can be used for a given input to output conversionratio. See Figure 2 for the maximum frequency that can be used for a given duty cycle.The duty cycle at which the converter operates is dependent on the mode in which the converter is running. If theconverter is running in discontinuous conduction mode, the duty cycle varies with changes to the load muchmore than it does when running in continuous conduction mode.