Electronics Architect / Calculators
Calculators
Seven calculators for the stages a power tree is made of, and for the tree as a whole. They need no account and show their equations.
- Buck converter power stage Every loss in a buck stage added up across the load range: switching, conduction, gate drive, dead time, snubber, core and ESR. Synchronous or catch diode, one phase or several, with transient droop and the input-filter stability check.
- Boost converter power stage Duty cycle, inductor and ripple current, peak switch current against the IC's current limit, the output current that limit allows, and the output capacitor and ripple, per TI's SLVA372D.
- LDO power dissipation and junction temperature Heat in a linear regulator at each input voltage, the junction temperature it reaches, the load and ambient the package allows, and the heat sink needed when it is not enough. With a first-order LDO-or-buck comparison.
- Power budget for a multi-rail circuit A tree of switching regulators and LDOs: each rail's power, loss and input current, the total drawn from the source, the overall efficiency and the battery runtime. First order, with fixed efficiencies.
- PCB trace width Minimum width for a current and a temperature rise per IPC-2221, outer or inner layer, any copper weight, with the width-against-current curve.
- Resistor voltage divider State the tolerance you need and get the cheapest E-series pair that meets it, an error budget that shows where the error actually comes from, and the yield from a Monte Carlo run.
- Passive filter and Bode plot RC, RL, LC and RLC filters, low-pass to band-stop, with magnitude and phase plots. Fit the values to an E-series and see what the rounding did to the response.
Need the whole power tree, not one stage? The editor solves every rail at once: voltages, currents, losses and warnings as you draw, with real parts from DigiKey.
These tools and articles give theoretical estimates for educational purposes. Real results depend on component tolerances, parasitics and thermal conditions.