Polymer tantalum chip capacitors offer higher capacitance and lower ESR

Vishay has introduced an enhanced T55 series of vPolyTan surface-mount polymer tantalum moulded chip capacitors with eight new ratings in the A, B, and T (low-profile B – 1.2mm max.) case sizes. Taking advantage of Vishay's market-leading package technology and recent investments in polymer tantalum technology, the Vishay Polytech T55 series now offers significantly higher capacitance and lower ESR for computer, telecom, and industrial applications. At 2.5V, capacitors in the B case now offer higher capacitance to 470 µF with ESR of 25mohm, in addition to lower ESR of 25mohm at a capacitance of 330µF. At 6.3V, devices in the A and T case sizes provide improved ESR of 70mohm at 100µF, while B case devices feature lower ESR of 40mohm at 33µF and 35mohm at 220µF. At 10V, devices in the B case size offer enhanced ESR of 70mohm at 47µF. The low ESR of the T55 capacitors is a result of their polymer cathodes, which offer greatly enhanced performance over manganese dioxide devices. In addition, the devices offer exceptional ripple current rating up to 2.28A IRMS and provide low internal resistance for enhanced charge and discharge characteristics. The capacitors are optimized for power management, battery decoupling, and energy storage in computers, tablets, smartphones, wireless cards, and solid state drives. Offered in the compact J, P, A, B, and T case sizes, the T55 series features a wide capacitance range from 3.3µF to 470µF over voltage ratings from 2.5V to 10V, and a capacitance tolerance of ±20 %. The devices provide ultra-low ESR from 500mohm down to 25mohm at +25C and 100kHz and operate over a temperature range of -55C to +105C with voltage derating above +85C. Featuring lead (Pb)-free terminations, T55 series capacitors are RoHS-compliant and halogen-free, says the company.