The AOZ2366QI-04 is a high-efficiency, easy-to-use DC/ DC synchronous buck regulator that operates over a wide 4.5V to 28V voltage range.The device is capable of supplying 22A of continuous output current with an output voltage adjustable down to 0.6V (±1.0%). A proprietary constant on-time PWM control with input feed-forward results in ultra-fast transient response while maintaining relatively constant switching frequency over the entire input voltage range. A low 80ns minimum ontime enables very low output voltages at ultra-high operating frequencies. Integrated AC ripple injection enables all-ceramic low ESR output filter capacitors and smaller PCB footprint with no external components needed. Selectable PFM mode optimizes light load efficiency while forced PWM mode maintains constant frequency for lower harmonic noise. The device features multiple protection functions such as VCC under-voltage lockout, cycle-by-cycle current limit, output over-voltage protection, short-circuit protection, and thermal shutdown. The AOZ2366QI-04 is available in a 5mm×5mm QFN_28L package and is rated over a -40°C to +85°C ambient temperature range.