AOZ1024DI Alpha & Omega

AOZ1024D EZBuck 4A Synchronous Buck Regulator General Description Features The AOZ1024D is a synchronous high efficiency, simple 4.5V to 16V operating input voltage range to use, 4A buck regulator. The AOZ1024D works from a Synchronous rectification: 100m internal high-side 4.5V to 16V input voltage range, and provides up to 4A switch and 20m internal low-side switch of continuous output current with an output voltage High efficiency: up to 95% adjustable down to 0.8V. Internal soft start The AOZ1024D comes in a DFN 5 x 4 package and is 1.5% initial output accuracy rated over a -40C to +85C ambient temperature range. Output voltage adjustable to 0.8V 4A continuous output current Fixed 500kHz PWM operation Cycle-by-cycle current limit Pre-bias start-up Short-circuit protection Thermal shutdown Small size DFN 5 x 4 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 VIN Ceramic L1 4.7H EN VOUT LX AOZ1024D COMP R1 C2, C3 22F R C FB Ceramic C C R2 AGND PGND Figure 1. 3.3V/4A Synchronous Buck Regulator Rev. 1.3 September 2009 www.aosmd.com Page 1 of 16 Not Recommended For New DesignsAOZ1024D Ordering Information Part Number Ambient Temperature Range Package Environmental AOZ1024DI -40C to +85C DFN-8 Green All AOS products are offered in packages with Pb-free plating and compliant to RoHS standards. Please visit www.aosmd.com/web/quality/rohs compliant.jsp for additional information. Pin Configuration PGND 1 8 LX LX 2 7 VIN LX 3 6 AGND EN GND 4 5 FB COMP 5 x 4 DFN (Top Thru View) Pin Description Pin Number Pin Name Pin Function 1 PGND Power ground. Electrically needs to be connected to AGND. 2V Supply voltage input. When V rises above the UVLO threshold the device starts up. IN IN 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 in to V if not used and do not leave it open. IN 7, 8 LX PWM output connection to inductor. Rev. 1.3 September 2009 www.aosmd.com Page 2 of 16 Not Recommended For New Designs