Panasonic recommends a PCB layout with a large copper area under the capacitor to reduce ESR. A minimum of 2oz copper thickness is recommended. Additionally, vias should be placed under the capacitor to connect to the internal planes to further reduce ESR.
The EEUFC1V391S is designed to operate at high frequencies, but its impedance increases with frequency. Panasonic provides a impedance vs frequency graph in the datasheet, which shows that the capacitor's impedance increases above 100 kHz. Engineers should consider this when designing high-frequency circuits.
Panasonic provides a derating curve in the datasheet, which shows that the capacitor's capacitance decreases with increasing temperature. For example, at 125°C, the capacitance is derated to 80% of its nominal value. Engineers should consider this when designing systems that operate at high temperatures.
Yes, the EEUFC1V391S is suitable for DC-DC converter applications due to its low ESR and high ripple current rating. However, engineers should ensure that the capacitor is properly sized to handle the expected ripple current and voltage stress in their specific application.
Panasonic's EEUFC1V391S is a high-reliability capacitor with a long lifespan. It has a failure rate of < 1% per 1000 hours at 125°C, which is comparable to or better than other high-reliability capacitors on the market. Engineers should consider this when designing systems that require high reliability.
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