The MAX1771ESA+T is an adjustable 12V high-efficiency, low-IQ, step-up DC-DC controller from Analog Devices. It features a proprietary constant on-time control architecture that yields high-efficiency and low output ripple from a wide input supply voltage range of 0.8V to 32V. It also offers 1.2A of output current, can auto-select between 3.2V/5.5V/7V/12V, and features adjustable frequency operation from 200kHz to 2MHz. It includes overvoltage, short-circuit, and thermal protection, and combines low-cost-per-channel status with a user-friendly, low-component-count design.