A new device from TDK Corporation is a multilayer ceramic chip “supercapacitor” (MLCC) with a new internal structure that allows equivalent series resistance (ESR) values to be set to any value within a specified range. The chip’s ESR is controlled by a patented structure approach. The ever more compact design of today’s electronic devices and significantly complex mounting densities necessitate the use of multiple capacitors of varying types. Also, impedances must be adjusted over broad frequency ranges. Given these constraints on product design, the effects of the minute electrical resistance elements in the capacitors themselves can cause interference depending on the frequency, a situation that can result in lower noise suppression effects. With these new capacitors, the ESR values can be held constant, or even lowered in some cases. Because the ESR values of the capacitors located in the vicinity of the CPU can be set, there are smaller changes in impedance between the power supply and the CPU over a broad range of frequencies as well as for voltage variation limiting effects. Limiting the variation in voltage stabilizes the current signal and eliminates effects on other circuits. Although the capacitor sizes (0603 and 0805) are the same as those of standard products, resistance can be adjusted up to 1200 mΩ for the 0603 product and up to 500 mΩ for the 0805 product.Find more information at the TDK website.
Multilayer Ceramic Capacitor Features Settable ESP
