Choosing the right input caps for your buck converter

With the variety of capacitor technologies available, choosing the appropriate input capacitors for your switchmode power supply (SMPS) can be very challenging. As a capacitor's characteristics depart from the ideal, designing for minimum input ripple voltage and current also becomes more important to extend capacitor lifetimes and supply reliability. In this article, we focus on choosing the right kind of capacitors and design technique for a low-voltage, point-of-load buck converter.

View the PDF document for more information.