Buck Converter Calculator
Free calculate buck converter parameters for dc-dc step-down voltage conversion including duty cycle, output voltage, and component values.
Input Parameters
Typical: 20-40% of average current
Results
Enter parameters to calculate buck converter values
Buck Converter Formulas
Duty Cycle
D = Vout / Vin
Where D is the duty cycle (0-1)
Inductor Value
L = (Vin - Vout) × D / (ΔI × f)
Where ΔI is ripple current, f is frequency
Output Capacitor
C = (Iout × D) / (ΔV × f)
Where ΔV is output voltage ripple
Input Current
Iin = Iout × D
Average input current