The LTC3427 is the industry's first high efficiency, fixed frequency, step-up DC/DC converter with true output disconnect in a 6-lead 2mm x 2mm DFN package. Requiring minimal external components, the LTC3427 operates from an input voltage as low as 1.8V. The LTC3427 contains an internal 0.525 N-channel MOSFET switch and a 0.575 P-channel MOSFET synchronous rectifier, which enables it to supply 200mA at 3.3V from a 2-cell alkaline battery input.