The MAX767CAP+ is a 5V to 3.3V, synchronous, step-down power-supply controller in 20 pin SSOP package. It is a high-efficiency, synchronous buck controller IC dedicated to converting a fixed 5V supply into a tightly regulated 3.3V output. Two key features set this device apart from similar, low voltage step-down switching regulators high operating frequency and all N-channel construction in the application circuit. The 300KHz operating frequency results in very small, low cost external surface-mount components. The inductor, at 3.3µH for 5A, is physically at least five times smaller than inductors found in competing solutions. All N-channel construction and synchronous rectification result in reduced cost and highest efficiency. Efficiency exceeds 90% over a wide range of loading, eliminating the need for heatsinking. Output capacitance requirements are low, reducing board space and cost.
