The EV3900DK-00B is an evaluation board for the MP3900DK. It is configured to provide a regulated 25V output at up to 2A load current from a 12V input. The output is adjustable by changing feedback resistors on the evaluation board. MOSFET Rds,on can be directly used for current sense purpose without an external sense resistor.

Although the demo board uses the external 10mW to sense the current, it also provides the stuffing option for users who want to use the R_ds,on as the sense element.