DRV8705-Q1: PVDD input capacitor requirement

Hi Team,

My customer is asking what is the minimum requirement of PVDD capacitor. It's seen on the datasheet that there must be a at least 10uF cap nearby. My customer wants to reduce it to one or two 4.7uF cap due to very strict cost control. Is that ok?  Also, my customer and I were wondering how these 10uF value comes from?

Thanks,

Han