So many electrons, so little time [Low Inductance Capacitor Arrays]

Abstract

High di/dt ratios, large current pulses over short times, are an inevitable part of today's fast electronic circuitry. Though desirable in themselves, they can cause high voltage spikes when pulled through paths that have inductance. The task of the designer then is to have high energies available, but not the associated voltage excursions, by reducing the total inductance. Eliminating wire bonds, reducing path lengths, and using low inductance components is the regimen. This paper describes the availability of capacitors that can go a long way to providing the energies needed, but simultaneously, lower the intrinsic inductance if contributes. We will review the source of the inductance, the current components available, and other advances that will give the designer a more useful menu.<>