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LM2991: Absolute maximum of Vout

Part Number: LM2991

Hello team,

My customer would like to know LM2991 Absolute maximum of Vout.

As described in section 7.3.2 of the data sheet, a Schottky diode is clamped at the output to prevent overshoot.
When the power supply shuts down, this diode works effectively and escapes the positive voltage across the output terminal. However, because the voltage drop of the diode (several hundred mV) remains, there is no margin for the positive side rating.

Although the customer checked TPS7A3301, they gave up on the TPS7A3301. Because +0.3V of TPS7A3301 absolute maximum cannot be meet by this overshoot.
How about LM2991? So the customer would like to know LM2991 Absolute maximum of Vout.

Your help is appreciated.

Best Regards,
Akihisa Tamazaki