AOZ1092DI Alpha & Omega

AOZ1092D EZBuck 3A Simple Buck Regulator General Description Features 4.5V to 16V operating input voltage range The AOZ1092D is a high efficiency, simple to use, 3A buck regulator. The AOZ1092D works from a 4.5V to 16V 50m internal PFET switch for high efficiency: input voltage range, and provides up to 3A of up to 95% continuous output current with an output voltage Schottky diode is included adjustable down to 0.8V. Internal soft start Output voltage adjustable to 0.8V The AOZ1092D comes in 4x5 DFN-8 packages and is 3A continuous output current rated over a -40C to +85C ambient temperature range. Fixed 500kHz PWM operation Cycle-by-cycle current limit Short-circuit protection Output over voltage protection Thermal shutdown Small size 4x5 DFN-8 packages Applications Point of load DC/DC conversion PCIe graphics cards Set top boxes DVD drives and HDD LCD panels Cable modems Telecom/networking/datacom equipment Typical Application VIN C1 22F Ceramic VIN L1 4.7H VOUT EN 3.3V U1 LX AOZ1092D R1 C2, C3 COMP FB 22F Ceramic R C C5 R2 GND AGND C C Figure 1. 3.3V/3A Non-Synchronous Buck Regulator Rev. 1.3 February 2009 www.aosmd.com Page 1 of 16AOZ1092D Ordering Information Part Number Ambient Temperature Range Package Environmental AOZ1092DI -40C to +85C DFN-8 4x5 RoHS All AOS Products are offering in packaging with Pb-free plating and compliant to RoHS standards. Please visit www.aosmd.com/web/quality/rohs compliant.jsp for additional information. Pin Configuration 1 8 VIN LX LX 2 7 PGND LX 3 6 AGND EN GND 4 5 FB COMP 4x5 DFN (Top View) Pin Description Pin Number Pin Name Pin Function 1V Supply voltage input. When V rises above the UVLO threshold the device starts up. IN IN 2 PGND Power ground. Electrically needs to be connected to AGND. 3 AGND Reference connection for controller section. Also used as thermal connection for controller section. Electrically needs to be connected to PGND. 4 FB The FB pin is used to determine the output voltage via a resistor divider between the output and GND. 5 COMP External loop compensation pin. 6 EN The enable pin is active HIGH. Connect EN pin to V if not used. Do not leave the EN pin floating. IN 7, 8 LX PWM output connection to inductor. Thermal connection for output stage. Rev. 1.3 February 2009 www.aosmd.com Page 2 of 16