Calculadora online gratuita

Decoupling capacitor

Abrir a calculadora

Exemplo At least 100 µF — use 100 µF with an ESR under 100 mΩ, plus a 100 nF ceramic at each supply pin (the bulk part is too slow on its own for the first few hundred nanoseconds)

A reservoir close to the chip supplies the current the rail cannot deliver fast enough: $C=\frac{\mathrm{\Delta I}\times \mathrm{\Delta t}}{\mathrm{\Delta V}}$, and the capacitor's own $\mathrm{ESR}$ must stay below $\frac{\mathrm{\Delta V}}{\mathrm{\Delta I}}$ or it drops the whole budget on its own.