In summary, Linear Technology’s step-down µModule® regulators are complete power systems containing the DC/DC controllers, power switches, inductors, compensation circuitry and a modest amount of input and output bypass capacitance in a single package. This allows what was a complex DC/DC power solution to become simple. The low EMI Family of µModule® regulators consists of eight step-down products which have been certified by an independent lab to meet EN55022 Class B radiated emission limits. EMI is a critical factor to consider for an end product as it may corrupt digital and RF signals inside the system or interfere with the operation of another device nearby. Prior to sale, all information technology equipment (ITE) commonly defined as having a regulated clock signal greater than 9kHz must meet government standards such as FCC Part 15 Subpart B in the United States and EN55022 in the European Union which defines acceptable amounts of radiated energy for industrial and commercial environments (Class A) or home environments (Class B). Linear Technology has decided to test all products to the more stringent Class B limit.