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LM76002: Usage condition and Webench result

Part Number: LM76002


my Customer would like to know this device available to use their condition below.

VIN: 18-36V

VOUT: 12-16V

IOUT: 1.5A

Webebnch shows us simulation result of 73.13 deg of phase margin with Fsw=500kHz. In this situation, switching frequency is changed to 1.9MHz in user preferred frequency. Webench has error as ". Design update failed - This design is not stable due phase margin either smaller than 35 or greater than 120".

in the other hand, 20kohm resistor is put to RT pin for 1.9MHz switching frequency. Webench updates design and shows result of 89.89 deg phase looks we can use it.

Can we use the device with 1.9MHz switching frequency for above condition?

Best regards,