DRV8353R: Split power topology gate current source

Hi Team, seeking your assistance. 

if or how the split supply power configuration for the DRV835x gate drivers, utilizing the LM5008A to create a15V supply for the gate supply voltage, creates a 1A sink/2A source current. Does it still provide the 1A/2A sink & source current as in the single supply? or is lessened in the dual supply configuration?

Thank you. 

- Mark