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UCC256403: Power ON/OFF cycle test

Guru 11170 points
Part Number: UCC256403

Hello E2E,

Our customer tried power ON->OFF cycle operation test.
When power-on immediately after power-off, the Vout is not to reach until target voltage.
Voltage of LL/SS is fauld to 1.3V when restart.
I think, the Rdischarge is left ON when restart.

I think that if it reduce the value of Css, this phenomenon will not occur.
Is this idea correct?
Is there any other solution?


Regards,
ACGUY