general

voltage divider

Vout = Vin × (R2 / (R1 + R2)) - leave one field empty to solve

enter 3 values to solve

parallel/series resistors

series: -
parallel: -

mosfets

junction temperature

P = I² × Rds(on), Tj = Ta + (P × θja)

power: -
Tj: -

switching losses

Psw = Qg × Vgs × fsw, Pcond = I² × Rds(on)

switching: -
conduction: -
total: -

analog

opamp gain/bandwidth product

GBP = Gain × Bandwidth - leave one field empty to solve

enter 2 values to solve

low pass filter (RC)

fc = 1 / (2πRC) - leave one field empty to solve

enter 2 values to solve

battery

battery life calculator

Estimates runtime based on capacity, sleep power, and TX events

runtime: -

switch mode power supplies

inductor sizing (buck converter)

L = (Vout × (Vin - Vout)) / (Vin × fsw × ΔI)

L: -
peak current: -

capacitor ripple current / esr heating

P = I²rms × ESR, estimates temperature rise

power: -
ΔT: -
cap temp: -

pcb traces

trace temperature rise

Estimates temperature rise based on trace dimensions and current

ΔT: -
trace temp: -

trace impedance

Calculates characteristic impedance for microstrip or stripline

Z0: -