A switching device and methods of making and operating the same are
provided. In one aspect, a method of operating a switching device is
provided that includes providing a MOS transistor that has a gate, a
source region, a drain region and a body region. A bipolar transistor is
provided that has a collector, a base and an emitter. The body region of
the MOS transistor serves as the base of the bipolar transistor and the
drain region of the MOS transistor serves as the collector of the bipolar
transistor. Activation of the MOS transistor causes the bipolar
transistor to turn on. The MOS transistor is activated to turn on the
bipolar transistor and the bipolar transistor delivers current to the
source region.