Utilize our free Buck Converter Calculator to quickly determine essential component values for your DC-DC step-down converter. Accurately calculate the required inductor, output capacitor, and duty cycle based on your desired input, output, and ripple specifications, ensuring efficient power supply design.
Formula:
The Buck Converter Calculator uses the following fundamental formulas:
Duty Cycle (D):
D = Vout / Vin
Inductor (L):
L = (Vout * (Vin - Vout)) / (ΔIL * Fsw * Vin)
Output Capacitor (Cout):
Cout = ΔIL / (8 * Fsw * ΔVout)
Variable Explanations:
Vin = Input Voltage (Volts)
Vout = Output Voltage (Volts)
Iout = Output Current (Amps)
Fsw = Switching Frequency (Hertz)
ΔIL = Inductor Ripple Current (Amps) - Calculated as a percentage of Iout
ΔVout = Output Voltage Ripple (Volts) - Calculated as a percentage of Vout