A Low Profile, Low ESL, Multi-Anode "Mirror" Tantalum Capacitor
By AVX Corporation
Abstract
Traditional tantalum capacitors have been known for their excellent reliability, robustness, and stable parameters. This is why conventional tantalum capacitors with counter MnO2 electrode are still a popular type of capacitor used for long life and high reliability applications. One of the downsides of the MnO2 electrode system is its higher ESR compared to the polymer type of tantalum capacitors. The multi-anode concept (i.e. use of more node elements within one capacitor body) significantly reduces ESR and is an ideal choice for most demanding applications such as servers and high power telecommunication boards. This article describes a novel multi-anode configuration that has been developed to reduce the height of the components, reduce manufacturing costs, and self inductance ESL. The low ESL extend the working frequency range up to the common DC/DC switching frequency 250 - 500kHz (D case).
Introduction
One common trend in switch-mode power supplies, micro-processors, and digital circuit applications is the reduction of noise while operating at higher frequencies. In order to make these possible components with low Equivalent Series Resistance (ESR), high capacitance and high reliability are required. One way to significantly reduce the ESR of tantalum capacitors has been a multi-anode approach where more anode elements are used within one capacitor body.
Click Here To Download:White Paper: A Low Profile, Low ESL, Multi-Anode "Mirror" Tantalum Capacitor