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TPSM86638: Duty cycle question

Part Number: TPSM86638
Other Parts Discussed in Thread: TPS56A37,

Tool/software:

Hello team,

I'm checking if TPSM86638 and TPS56A37 can support 12V output with 12.5 Vin.

From datasheet, max duty cycle is 98%, which means input voltage can be down to 12.3V for 12V output.

In Webench simulation, TPSM86638 works well, but TPS56A37 does not even if both has same max duty cycle?

Can you confirm if both device can support this condition?

Best Regards,

Austin