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BQ76200: Please help to evaluate if we could add more capacitor of CVDDCP

Part Number: BQ76200

Tool/software:

Hi Expert,

My customer is evaluating BQ76200 to drive 6pcs MOSFET, which means 6pcs*17nF input parasitic capacitance for all MOSFETs.

1. They meet with problems when using 1uF as CVDDCP, the system couldn't power up normally.

2. They add the CVDDCP up to 2.2uF, the system work normally. 

There are some questions:

1. Is there any calculation for CVDDCP and loading capacitor?

2. Please help to review if there is any risk to increase the CVDDCP to 2.2uF?

3. I also notice the description of capacitor choice in datasheet, I just wonder if the 470-nF/2.1-uF value is valid value in real DC or  just nominal value? 

Best Regards,

Jack Li