Online Switching Regulator Design Calculator

Home› Applications› Online Switching Regulator Design Calculator

Online Switching Regulator Design Calculator

This online tool lets you quickly size and optimize switching voltage regulators. Enter your input and output voltages, switching frequency, load current, efficiency, and ripple factor. This will help you calculate important values. These include duty cycle, inductor value, peak current, diode power loss, and output capacitor size. With this information, you can confidently design your own DIY switching circuits to meet your needs.

Switching Regulator Design Calculator

Our tool helps you design DC–DC switching circuits. You enter input voltage, output voltage, switching frequency, load current, efficiency, and ripple factor. You will get the duty cycle, inductor size, peak current, diode loss, and capacitor value. This information helps you build your own regulator.

A switching regulator turns one DC voltage into another. It uses a switch, a diode, an inductor, and a capacitor to store energy and release it. This wastes less power than a linear regulator.

You can pick buck or boost mode. In buck mode, it steps down a higher voltage. In boost mode it raises a lower voltage up. Changing mode updates the numbers and the circuit image right away.

Inside the regulator, the transistor works as the switch. The inductor holds energy when the switch is on and gives it back when it is off. The capacitor smooths the output. The diode guides the current in one direction.

For example, the MC34063 in buck mode turns 12 V into 5 V. The TPS61022 in boost mode turns 3.7 V into 5 V.

To use the tool, pick buck or boost and fill in your values. Click “Calculate” and you see all the results and a matching circuit diagram.

FAQ

What is a switching regulator?

A switching regulator is a device that changes one DC voltage to another. It uses a transistor switch, an inductor, a a diode, and capacitor to move energy. This method cuts wasted power.

How do I use the calculator?

Pick “Buck” or “Boost” mode. Enter your input voltage, output voltage, switching frequency, load current, efficiency, and ripple factor. Click “Calculate.” You will see the duty cycle, inductor size, peak current, diode loss, capacitor value, input power, and output power.

When should I choose buck mode?

Choose a buck when your input voltage is higher than the output you need. The calculator will show how to step down the voltage.

When should I choose boost mode?

Choose boost when your input voltage is lower than the output you need. The calculator will show how to raise the voltage.