A small buck converter has 24 V input and 12 V output. The transistor has Rds(on) - 0.1 Ohm. The diode is modelled as a 1.0 V drop. Each device has junction to ambient Rtheta(ja) = 40 K/W and Tjunction < 150 celsius. You may suggest a switching frequency.
What is the maximum load possible without a heat sink at 20 celsius ambient?