Demonstration circuits DC355 and DC356 are complete DC/DC step-down regulators using the LT1959 constant frequency, high efficiency converter in 7-pin DD (DC356) and SO-8 (DC355) packages. These circuits are primarily used in personal computers, disk drives, portable handheld devices and, in larger systems, as local on-board regulators. High frequency switching allows the use of small inductors, making this all surface mount solution ideal for space conscious systems