I need to include overcurrent protection in my circuit. Previously, I used current sense amplifiers to achieve that, but the this application needs current sensing in the microamp region and most of ics I used before did not have a appropriate resolution. I need to limit the load to 150 microamps. I was thinking on using something like MAX4373 but its leakage current is too big. The Vrs+ in my case is 0.08-1.2V and I don't mind having bigger voltage drop at Rsense since the load is a thermistor.
Any suggestions?
Any suggestions?