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LM5019: About bootstrap capacitor

Part Number: LM5019

Hi team.

My customer wants to apply the LM5019's bootstrap capacitor to 470pF.

Does the problem occur when the bootstrap capacitor is applied below 10nF ?

The System condition is input voltage 54V and the output voltage 3.3V.

Currently he don't have capacitor 10nF/100V.

So he want to use 470pF/100V.

Thank you.