MOSFET technologies for wide input DC/DC converters enable the design of fast switching and high-efficiency power systems. Consequently, the latest DC/DC converters lead to fast switch voltage slew rates (dv/dt) and high-current slew rates (di/dt) which exacerbates the EMI emissions from a switch mode power supply and can cause problems to peripheral modules. For more details on the sources of EMI in DC/DC converters see the EMI Guide technical article series. EMI filters are inevitably part of a power electronic system, but since filtering adds unwanted size and cost, it is incumbent on the designer to look for all possible avenues including package technology for EMI noise reduction and mitigation. Regulatory compliance to electromagnetic compatibility (EMC) standards—for example, CISPR 32 for multimedia equipment and CISPR 25 for automotive applications is vitally important, as the efforts required to achieve compliance affect both product development costs and time to market. CISPR-25 is one of the most stringent emission standards for vehicles and devices targeting radio disturbance characteristics. The limits and methods of measurements are intended to protect onboard receivers from disturbances produced by components, such as a switching regulator in a power-supply design. For a deeper understanding of CISPR and other emission standards, see An overview of conducted EMI specifications for power supplies and An overview of radiated EMI specifications for power supplies white papers.

Low-EMI switching regulators utilize package technology, optimized pin-outs, and layout guidelines to minimize conducted and radiated noise from DC/DC converters which can enhances power system's performance to meet stringent EMI standards. TI's latest converter, LM60440, leverages the latest Enhanced HotRod QFN technology, and the pinout and package of the LM60440 regulator have been diligently optimized to minimize the parasitic inductance of switching loops to achieve the best-in-class low-noise performance.