AOZ24585QV Datasheet | Alpha & Omega Semiconductors

Description The AOZ24585QV is a high-efficiency, easy-to-use DC/DC synchronous buck regulator that operates up to 18V. The device is capable of supplying 30A of continuous output current with an output voltage adjustable down to 0.8V (±0.5%). The AOZ24585QV integrates an internal linear regulator to generate 5.3V VCC from input. If input voltage is lower than 5.3V, the linear regulator operates at low drop output mode, which allows the VCC voltage is equal to input voltage minus the drop-output voltage of the internal linear regulator. 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 40ns minimum on-time 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 ponents 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 AOZ24585QV is available in a 6mm×5mm QFN-36L package and is rated over a -40°C to +125°C ambient temperature range. Features - Wide input voltage range: - 6.5V to 18V - 30A continuous output current - Output voltage adjustable to 0.8V (±0.5%) - Low RDS(ON) internal NFETs - 3.6mΩ high-side - 1mΩ low-side - Integrated LDO or external 5 V supply - Constant On-Time with input feed-forward - Selectable Switching Frequency Range: 400k Hz to 1MHz - Selectable PFM or forced PWM for light load operation - Ceramic capacitor stable - Remote sense - Power Good output - Integrated bootstrap diode - Cycle-by-cycle current limit with selectable setting - Under-voltage protection and...