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TPS25831-Q1: Frequency foldback at VIN>19V

Part Number: TPS25831-Q1

Hi team,

I would like to know the VBUS behavior when VIN goes >19V and <19V back and force.

I plan to use Fsw=2MHz @ max Iload of 3A.

I concern when Fsw changed from 2MHz to 420kHz(default) at VIN cross 19V, Vbus goes out of regulation.

Could you explain how Vbus behaves when Fsw changes from 2Mhz to 420kHz and 420kHz to 2MHz?

regards,