I have some problem with ADP5073.
I tried to get a Vout = -10v, with VIN = 3.3V using the circuit in datasheet.
I gave VDD (I tried 3.3~5V) and found that VREG was about 0.3V.
It means that I can not turn on the regulator.
I tried to send a 3.3v to EN pin, however, I found that the EN pin has a 0.5v output voltage.
I thought that EN pin suppose to be an input pin.
Does anyone have a suggestion?
EN is an input pin. It triggers the converter to start switching once EN threshold level is reached. You may want to share your schematic here or send me an email so I can review for you. Check that there is switching at the SW pin.
I found the problem immediately after posting the question. We have a layout bug on our PCB.
Thanks for your reply in such a short time.
It is good news. Always make sure that the PCB layout guideline is followed.