AOZ2253TQI-11 Datasheet | Alpha & Omega Semiconductors

Description The AOZ2253TQI-11 is a high-efficiency, easy-to-use DC/DC synchronous buck regulator that operates up to 28V. The device is capable of supplying 8A of continuous output current with an output voltage adjustable down to 1V to 1.5V. The AOZ2253TQI-11 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. 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 AOZ2253TQI-11 is available in a 4mm x 4mm QFN22L package and is rated over a -40°C to +85°C ambient temperature range. Features - Wide input voltage range - 6.5V to 28V - 8A continuous output current - Output voltage adjustable down to 1V to 1.5V - Low RDS(ON) internal NFETs - 28m high-side - 11m low-side - Constant On-Time with input feed-forward - Ceramic capacitor stable - Adjustable soft start - Power Good output - Integrated bootstrap diode - Cycle-by-cycle current limit - Short-circuit protection - Thermal shutdown - Force PWM operation - Thermally enhanced 4mm x 4mm QFN-22L package Applications - pact desktop PCs - Graphics cards - Set-top boxes - LCD TVs - Cable modems - Point-of-load DC/DC converters - Tele/Networking/Data equipment Rev. 3.0 September 2022 .aosmd. Page 1 of 17 Typical Application R3 100kΩ Power Good C4 4.7μF Off...