A buck regulator with an input voltage of 15V and an average output voltage of 5V, has peak to peak output voltage ripple requirement of 20 mV The switching frequency is 20 kHz and the peak-to-peak...

A buck regulator with an input voltage of 15V and an average output voltage of 5V, has peak to peak output voltage ripple requirement of 20 mV The switching frequency is 20 kHz and the peak-to-peak ripple current of the inductor is limited to 0.6A, then the duty cycle is

• 
  Option 1:
  

  0.7

  
  


• 
  Option 2:
  

  0.3

  
  


• 
  Option 3:
  

  0.67

  
  


• 
  Option 4:
  

  0.33