As electronic applications gain popularity, the demand for AC-DC external power supplies is also increasing. The volume of external power supplies is projected to increase by more than 11% between 2009 and 2013. Today, globally, between 6 and 10 billion power supplies remain plugged in unused for 20 hours a day, continuously wasting electricity. These figures illustrate concerns about increasing energy waste and the potential impact of reducing standby power.

While the best power supplies have an efficiency of over 90%, some are only 20–40%, wasting most of the electricity. Power supplies account for approximately 10% of annual residential electricity consumption. Although regulations and technology help reduce standby power, the number of electrical devices and tools continues to increase, particularly in developing countries.

Fairchild Semiconductor's new mWSaver™ technology provides best-in-class power savings in power supplies with the minimum possible number of components. The devices in the mWSaver series utilize five patented technologies. It is only through the integration of these technologies—off-time modulation for reduced power consumption, JFET HV startup and circuitry, feedback impedance switch, HV discharge, and PSR control—that it is possible to meet the most demanding standby power requirements.

The features of Wsaver Technology are;
• Best-in-class standby and no-load power consumption per component
• The ability to reduce standby power of external components such as resistors, capacitors, inductors, and rectifiers.
• Excellent efficiency rating at full load
• Capability to exceed global no-load regulatory conditions
• brownout, under-voltage lockout (UVLO), over-voltage protection (OVP), open-loop pr