|13th May 2012, 08:33 AM||#11|
Join Date: Jan 2007
Minimizing Switching Regulator Residue in Linear Regulator Outputs
Ferrite beads before/after ...
Just saw this on YouTube -- a topical lecture given by Linear Tech:
Minimizing Switching Regulator Residue in Linear Regulator Outputs - YouTube
Linear Technology Video Channel - Minimizing Switching Regulator Residue in Linear Regulator Outputs
"Linear regulators are commonly employed to post-regulate switching regulator outputs. Benefits include improved stability, accuracy, transient response and lowered output impedance. Ideally, these performance gains would be accompanied by markedly reduced switching regulator generated ripple and spikes. In practice, all linear regulators encounter some difficulty with ripple and spikes, particularly as frequency rises. This video, excerpted from LTC Application Note 101, explains the causes of linear regulatorsí dynamic limitations and presents board level techniques for measuring and improving ripple and spike rejection."
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