SD card/SDIO 3.0 level translation solution

[asmi]

Isn't 1.95 V a little bit too low on the microcontroller side?

No, that's perfect for 1.8 V logic level.

[antercreeper]

The worst things is those level shift chips are really hard to obtain and very expensive......
I choose ti TXB0104 and TPS62743, or an adjustable LDO is ok.(From datasheets, you can change TPS62743's voltage during running by changing vsel pins.)
of course you can make a power switch if your system has both 1.8V and 3.3V rails, for example mp5095)
These chips are really really common and very cheap.