I'm using the ADM7151ACPZ-04-R2 regulators, in several places, in my board.
One of the regulators is designed to generate 5V_VCC, from 6V input.
When EN is high level (3.3V), regulator produces normal output, of about 4.9V.
When EN is low level (0V), regulator doesn't turn off output to 0V. I measure about 1V.
During the debug of this problem, I found three mistakes, in my design.
I corrected the three mistakes, but still regulator is not totally off, when EN is at low level.
See below a copy, of the relevant portion in my design. The corrected mistakes are colored Red.
I have similar problem with 3.3V regulator, which is designed using ADP125ACPZ-R7.
VOUT is 3.26V when EN is 3.3V and it reduced to 1.8V, when EN is 0V.
All other regulators seems to be okay on enabled and disabled states.