Tool/software:
Hi.
I'm inputting 5V to the EN pin and setting the EN pin to High, but sometimes I can't detect Vout.
Upon checking the cause, the voltage at the EN pin is around 1V.
Out of 30 circuit boards, the same phenomenon occurred on 3 boards. I would like to know the possible causes.
Katsuya
Hi Katsuya,
The problem is likely coming from the 18k ohm pull up resistor. The EN pin is supposed to be tied directly to VINP like in this diagram.
There could be other problems in the circuit, but this is a likely culprit. Let me know if you are still having problems after removing the pull up resistor.
Regards,
Carter
