Smaller package sizes and increased power density levels are the order of the day in circuit designs intended for power conversion. They are just one of a broad range of pressures being exerted onto electronics engineers, however. Energy efficiency and operational reliability are two equally significant demands, along with cost constraints.
Power MOSFETs find wide employment in the switching and amplifying of electronic signals. They are the most commonly used low voltage (sub 200V) switches, but have drawbacks when switching rapidly at higher voltages. Superjunction MOSFETs were developed to help alleviate such problems. They offer reductions in a variety of different areas - including die size, which has a direct influence on device cost. However, they still require close attention to be paid to the system design, particularly in terms of reducing PCB parasitics.