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OMAP-L137's RVDD & PLL0_VDDA separate supplies needs

Stephane Mouton
Prodigy 90 points
Other Parts Discussed in Thread: OMAP-L137

Hello,

I'm currently working on a board that embeds an OMAP-L137 and I'm having some trouble to find information about the proper way of supplying it.

On the EVM Board, I've noticed that RVDD and PLL0_VDDA are separated from CVDD and supplied by two cascaded LDO regulators.

Is that mandatory for a reliable operation of the PLL ?

What are the acceptable noise conditions for PLL supply ?

Does RVDD also needs a particular care of filtering ?

Thanks in advance for your answers.

Regards,

Stephane