Hi, Alvaro
Can you attach your schematics here so that we can have a review?
I suppose that you want to convert the 3.3V logoc from K22 to 1.8V logic, in the case, because the VrefB should be greater than VrefA, so you should connect 1.8V regulator to VtrefA, connect the EN and VREFB pins to 3.3V via 200Kohm pull-up resistors. Pls refer to Fig 8. Typical application circuit (switch enable control) in NVT2008_NVT2010.pdf.
The K20 output/input should be connected to B side.
Hope it can help you
BR
XiangJun Rong
Hello Rong,
Hi,
How about connecting the VREFB pin to 3.3V via a pull-up resistor as Fig 7. Typical application circuit (switch always enabled) rather than connecting 3.3V to VrefB directly?
BR
Xiangjun Rong
Hello Rong,
It may be confusing because in the first image the VREFB is on the right side and in the second image is on the left side, but I have connected VREFB and EN via a 200k pull-up resistor.
Regards,
Álvaro