My design drives this device with -16V for an intended regulated output of -15
Problem: no output (-0.3v or so).
The EN pin is tied to the -16V input.
Then, I read the data sheet:
Absolute Maximum Ratings
EN to GND 5 V to VIN
EN to VIN +30 V to −0.3 V
Pin Configurations and Function Descriptions
EN Drive EN 2 V above or below ground to enable the regulator, or drive EN to ground to turn off the regulator. For automatic startup, connect EN to VIN.
These seem ambiguous. VIN is -16V, well below the -0.3V absolute maximum for the EN pin. The data sheet can't be right.
I hesitate to tie EN to +5V until I hear from the experts.