The higher switching frequency allows for lower-value inductors and smaller output capacitors, which result in a smaller solution size and lower component cost. However, higher switching frequency brings more switching loss, making the solution less efficient and produce more heat. The switching frequency is also limited by the minimum on time of the following as mentioned in Section 8.3.4:

• Integrated power switch
• Input voltage
• Output voltage
• Frequency shift limitation

For this example, a switching frequency of 500 kHz is selected.