Passives

Polymer tantalum capacitors now offer reduced ESR

5th February 2016
AVX
Nat Bowers

AVX's F38 series of miniature, undertab, conductive polymer tantalum capacitors now feature a significantly reduced ESR for several ratings. The series, which already offered one of the smallest and highest CV polymer tantalum capacitors in the industry (0603 capacitors with an ultralow profile of 0.9mm and 6.3V/47μF ratings) now offers the lowest ESR small case size polymer capacitors available on the market, says AVX.

Made of conductive polymer materials and featuring SMD facedown terminals, which help enable low ESL and higher capacitance values in small case sizes, the F38 capacitors exhibit high conductivity, low ESR, low ESL and high ripple current capabilities. The series also offers a more benign failure mode than traditional SMD electrolytic capacitors and is suited for use in demanding microminiature hybrid circuits and a variety of both handheld and wearable electronics, including: smartphones, tablets, portable games, wireless modules, fitness trackers and smartwatches.

Allen Mayar, Product Marketing Manager, AVX, commented: “High ESR can cause circuit malfunction and component damage. So, reducing the ESR of our F38 series miniature, low profile polymer tantalum capacitors provides significant performance benefits above and beyond the small size and high CV they already offered, making them an attractive device for small handheld and wearable electronics."

F38 series polymer tantalum capacitors are currently available in two miniature cases sizes, 0603 and 0805, with ultralow profiles of 0.9mm (0.80mm ±0.10mm) and 1.0mm, voltage ratings from 6.3 to 10V and capacitance values of 2.2 to 68μF with a ±20% tolerance at 120Hz. 0402 case size components are presently under development, as is a 0805 case rated for 4V and 100μF.

Lead-free compatible and RoHS-compliant per the RoHS2 directive 2011/65/EU, F38 series capacitors are rated at 85°C and designed for use in operating temperatures from -55 to +105°C. Lead time for the series is 8-10 weeks.

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