EMI compliance to limits such as EN55022 is highly dependent on the operating conditions of the device under test. Factors such as higher input/output voltage ratio and the amount of output power significantly influence the amount of radiated noise. In general, radiated noise increases with higher input/output voltage ratios and with higher output power. Linear Technology’s line of µModule® regulators offer the highest combination of output power and input voltage within EN55022 Class B limits.