12W Step Up DC-DC Converter using MAX1771

This compact step-up DC-DC converter delivers up to 90% efficiency with load currents up to 1A. The design is based on the MAX1771, which uses a unique current-limited Pulse Frequency Modulation (PFM) control scheme. This architecture combines the high efficiency of traditional PWM converters at heavy loads while consuming less than 110µA supply current, significantly lower than the 2mA to 10mA typically required by PWM-based designs.