The Smart MOSFETs are now really smart enough to use them in such applications as RC High Current switches. More, they have a current sensing output, which could be used for current sensing instead of commonly used Schunt+IC .
An example for such a device is BTS50015 - BTS50015-1TAA-Data-Sheet-11-Infineon.pdf
The very low Rds of less than 1.5mOhm and 3.3-5V drive voltage capabilities make it a nice device for further researches. The ICs could be also connected in parallel for higher currents.
Here is a typical current sensing diagram from IS pin:
Enjoy and have fun!