Design Tips

March 2024

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Figure 1. Buck regulator to power noise sensitive loads with an LC filter on the output

Switching Regulator Noise Reduction with an LC Filter

Frederik Dostal, Analog Devices, Inc.

Different filtering techniques can be used to reduce the noise of a switching regulator. One that works especially well is an LC filter with an inductor in series with the power flow and a capacitor from the filtered voltage to ground. This type of LC filter creates a double pole in the frequency domain. Dependi

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Date:

03/01/2024

Power Systems Design

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