Overview:
Output ripple and noise specifications describe the AC contamination riding
on the DC output of switching DC/DC converters. This AC signal usually
consists of a periodic "low frequency" component derived from
the basic switching frequency of the power converter and numerous, high-frequency
"noise" components emanating from the high-speed edges and pulses
within the converter. You may observe these phenomena over any bandwidth;
however, they are traditionally specified over a bandwidth of 20MHz.
Procedure:
Set the input voltage and output current to Vin (nominal) and Iout (maximum),
respectively. The output ripple and noise voltage Vr is specified and
measured in millivolts as either the peak-to-peak or RMS value of the
AC component of the output voltage with both the input voltage and output
current held constant.
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