Selecting Tantalum Capacitors for Low Profile, Small Form Factor Applications

摘要

Efforts continue in reducing the size of power systems, while at the same time improving overall system performance. This is especially important for applications with low profile, small form factor embedded controllers. Board space is at a premium for these new embedded controller applications. Capacitors, electrolytic, or ceramic MLCCs usually occupy a large amount of valuable PC board space in and around the power systems and the processor. Designers need to pay careful attention in the selection of the right capacitor for use in these space-sensitive applications. The challenge for component suppliers is to develop innovative miniaturized, smaller footprint, component solutions that not only solve the space problem, but also help to improve the overall power system efficiency. The capacitors discussed are of multi-anode construction with lower equivalent series resistance (ESR) as compared to conventional packaging. For capacitor suppliers, the drive toward miniaturization requires careful analysis of the power system's electrical requirements, as well as mechanical concerns and overall manufacturability. This paper will discuss the selection and application of capacitors for low profile, small form factor applications.