Switch ICs with Adjustable Current Limiting

Transistors are often used for switching power supply voltages. MOSFETs are most often used, since they have low ‘on’ resistances, and they are also available for large currents. What a discrete transistor or MOSFET lacks are protective functions, such as current limiting and overtemperature protection. The MIC2545A from Micrel can provide a solution to this problem. This MOSFET switch has programmable current limiting, as well as undervoltage and overtemperature cutouts.