Electrical & Electronics

Buck & Boost Converter Calculator

Size or check a buck or boost converter inductor, estimate current and output ripple, and compare capacitor and power requirements.

Your inputs

Converter type

Inductor calculation

Input voltage · V

Target output voltage · V

Load current · A

Frequency · kHz

Target current ripple / average · peak-to-peak · %

Estimated efficiency · %

Capacitance · µF

Capacitor ESR · mΩ

Allowed output ripple · peak-to-peak · mV

Ideal CCM duty and component estimates. Efficiency only adjusts input power/current and total loss. Actual switch drops, control limits and DCM need a device-specific model.

Ripple sizing only; allow for transient loads, DC bias, tolerance and temperature. Follow the controller’s capacitor and compensation requirements.

TI SLVA477 · TI SLVA372

Your results

Duty cycle: —

Inductance: —

Inductor ripple · CCM estimate: —

Ideal average inductor current: —

Ideal peak inductor current: —

Ideal RMS inductor current: —

Minimum output capacitance · ripple only: —

Estimated output ripple · peak-to-peak: —

Ripple from ESR: —

Input current: —

Output power: —

Estimated total power loss: —

Ideal inductor current over one switching period

Formula—

How to use this tool

Converter type · Input voltage · Target output voltage · Load current
Inductor calculation · Frequency · Inductance · Capacitance
Your results · Formula · Print results