LMR36506-Q1: Quiescent current higher than expected

Hello,

I am using the LMR36506 in a very critical power consumption application.

Our input voltage is 9V and our output voltage is 1V8. Our circuit is as follow:

We measured a quiescent current of 37uA.

We were expected a quiescent current <5uA

Do you have any idea why our quiescent current is higher than what we find in the datasheet?

Thanks for your help,

Best Regards