AWG G3 PAD FOR PS3 Dokumentacja Strona 154

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6 Device PowerSupply General Purpose Power Supply (GPDPS)
154 System Reference, January 2001
The effect of a high load capacitance in this performance
range can clearly be seen:
the voltage ripple is reduced
ringing occurs
recovery of the DPS voltage level takes longer
Decoupling Recommendations
Powering noise-sensitive DUTs requires noise filtering on
a load board level. For this purpose, installation of bypass
capacitors is necessary.
NOTE Do not confuse these bypass capacitors with the load
capacitor needed to ensure stable operation of the GPDPS.
Radio Frequency Decoupling
Connect a small high-frequency decoupling capacitor as
close as possible to each power pin of your DUT. The
optimum value for this capacitor depends on your specific
application, however, you can normally use a ceramic
capacitor of 1 nF to 22 nF. Surface-mount capacitors
provide the best results, because of their reduced lead
inductance.
Filtering out GPDPS Related Noise
Due to the DC/DC converters which provide the GPDPS
with power, the Device Power Supplies generate noise in
the high-frequency range (basically 1 MHz and 200 kHz).
You can filter out this noise by means of a ceramic bypass
capacitor at the DUT.
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