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MCT8316A: DVDD issue

Part Number: MCT8316A

Hi team,

Here's an issue from the customer may need your help:

The figure above shows the MCT8316A internal block diagram.

From this figure, the input of the internal power DVDD only has the Buck power supply. Does the internal DVDD fail to power without the design of the Buck power supply related circuitry? And then the MCT8316A doesn't work?

The purpose of this Buck power supply should be to supply power to external circuits, right? If without this Buck the MCT8316A would not work, it seems not so reasonable. 

Could you help check this case? Thanks.

Best Regards,

Cherry