AOZ1232QI-01 Alpha & Omega

AOZ1232-01 TM 28V/6A Synchronous EZBuck Regulator General Description Features The AOZ1232-01 is a high-efficiency, easy-to-use DC/DC Wide input voltage range synchronous buck regulator that operates up to 28V. 2.7V to 28V The device is capable of supplying 6A of continuous 6A continuous output current output current with an output voltage adjustable down to Output voltage adjustable down to 0.8V (1.0%) 0.8V (1.0%). Low R internal NFETs DS(ON) The AOZ1232-01 integrates an internal linear regulator 35m high-side to generate 5.3V V from input. If input voltage is lower CC 12m low-side SRFET than 5.3V, the linear regulator operates at low drop- output mode, which allows the V voltage is equal to Constant On-Time with input feed-forward CC input voltage minus the drop-output voltage of the Programmable frequency up to 1MHz internal linear regulator. Internal 5.3V/20mA linear regulator A proprietary constant on-time PWM control with input Ceramic capacitor stable feed-forward results in ultra-fast transient response while Adjustable soft start maintaining relatively constant switching frequency over Power Good output the entire input voltage range. The switching frequency Integrated bootstrap diode can be externally programmed up to 1MHz. Cycle-by-cycle current limit The device features multiple protection functions such as Short-circuit protection V under-voltage lockout, cycle-by-current limit, output CC Thermal shutdown over-voltage protection, short-circuit protection, as well Thermally enhanced 5mm x 5mm QFN-30L package as thermal shutdown. The AOZ1232-01 is available in a 5mm x 5mm QFN-30L Applications package and is rated over a -40C to +85C ambient Portable computers temperature range. Compact desktop PCs Servers Graphics cards Set-top boxes LCD TVs Cable modems Point-of-load DC/DC converters Telecom/Networking/Datacom equipment Rev. 1.3 October 2012 www.aosmd.com Page 1 of 18AOZ1232-01 Typical Application for V = 12V or above IN Input = 12V or above IN R TON C2 AIN TON 22F BST C5 VCC 0.1F C4 R3 AOZ1232-01 1F 100k Output Power Good PGOOD LX L1 R1 Off On EN FB C3 100F R2 AGND SS C SS PGND Analog Ground Power Ground Typical Application for V = 5V IN Input = 5V IN R TON C2 AIN TON 22F BST C5 VCC 0.1F C4 R3 AOZ1232-01 1F 100k Output LX Power Good PGOOD L1 R1 Off On EN FB C3 100F R2 AGND SS C SS PGND Analog Ground Power Ground Rev. 1.3 October 2012 www.aosmd.com Page 2 of 18