Which outcome occurs when resonant frequency in an RC circuit approaches switching frequency in a DC-DC converter?

💡 Explanation

When resonant frequency approaches switching frequency, impedance matching causes increased energy transfer into resonant oscillations because the capacitive and inductive reactances cancel each other near that frequency. Therefore, power supply instability increases, rather than increased capacitor lifespan, negligible switching losses, or eliminated output ripple, which require different circuit conditions.

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