The DC Characteristics of this spec might be of use to you:
http://www.robotshop.com/PDF/microSD_Spec.pdf
Looks like just stopping the clock will drop current down to 0.6mA.
The DC Characteristics of this spec might be of use to you:
http://www.robotshop.com/PDF/microSD_Spec.pdf
Looks like just stopping the clock will drop current down to 0.6mA.