I need to up-translate two complementary 2.5 V signals to 5 V. I am looking for a circuit which can do this and which consumes ultra-low static power. I tried to design one, using 4 MOSFETs as shown below:
The circuit uses 4 MOSFETs in a cross coupled configuration to generate the desired signals. However, I was unable to reduce the shoot through current in the MOSFETs beyond a point (Large values of R1 and R2 affects my output rise time) and the circuit is still consuming close to 50 uW at 5V VDD. I am using the output of this circuit to drive other MOSFETs which have a combined capacitance of 1nF. I want the total power consumption of this driver to be less than 10 uW. So, I searched for level shifting ICs on Digikey's and Mouser's websites, but unfortunately couldn't find a part matching my requirement. I found a part from NXP on their website, however they haven't started shipping it yet. I am hoping if somebody could suggest me a better circuit or provide an alternative to the IC I am looking for. Thanks in advance.