AOZ3013PI EZBuck 3 A Synchronous Buck Regulator General Description Features The AOZ3013PI is a high efficiency, easy to use, 3 A 4.5 V to 18 V operating input voltage range synchronous buck regulator. The AOZ3013PI operates 65 m internal high-side switch and 36 m internal from 4.5 V to 18 V input voltage range, and provides up low-side switch (at 12 V) to 3 A of continuous output current with an output voltage Up to 95 % efficiency adjustable down to 0.8 V. External soft start The AOZ3013PI comes in an exposed pad SO-8 Output voltage adjustable to 0.8 V package and is rated over a -40 C to +85 C operating 3 A continuous output current ambient temperature range. 500 kHz PWM operation Cycle-by-cycle current limit Pre-bias start-up Short-circuit protection Thermal shutdown Exposed pad SO-8 package Applications Point of load DC/DC converters LCD TV Set top boxes DVD and Blu-ray players/recorders Cable modems Typical Application VIN C1 C SS 10F VIN SS L1 4.7H EN VOUT LX AOZ3013PI R1 COMP C2, C3 R C FB 22F AGND PGND R2 C C Figure 1. 3.3 V, 3 A Synchronous Buck Regulator, Fs = 500 kHz Rev. 1.0 October 2013 www.aosmd.com Page 1 of 14AOZ3013PI Ordering Information Part Number Ambient Temperature Range Package Environmental AOZ3013PI -40 C to +85 C EPAD SO-8 Green Product AOS Green Products use reduced levels of Halogens, and are also RoHS compliant. Please visit www.aosmd.com/media/AOSGreenPolicy.pdf for additional information. Pin Configuration 1 8 PGND LX 2 7 VIN SS PAD (LX) 3 6 AGND EN 4 5 FB COMP Exposed Pad SO-8 (Top View) Pin Description Pin Number Pin Name Pin Function 1 PGND Power ground. PGND needs to be electrically connected to AGND. 2 VIN Supply voltage input. When VIN rises above the UVLO threshold and EN is logic high, the device starts up. 3 AGND Analog ground. AGND is the reference point for controller section. AGND needs to be electrically connected to PGND. 4 FB Feedback input. The FB pin is used to set the output voltage via a resistive voltage divider between the output and AGND. 5 COMP External loop compensation pin. Connect a RC network between COMP and AGND to compensate the control loop. 6 EN Enable pin. Pull EN to logic high to enable the device. Pull EN to logic low to disable the device. If on/off control in not needed, connect EN to VIN and do not leave it open. 7 SS Soft-start pin. 5 A current charging current. 8 LX (Sense) Switching node. This pin has to be externally connected to exposed pad LX through PCB. Exposed pad LX Switching node. LX is the drain of the internal PFET. LX is used as the thermal pad of the power stage. Rev. 1.0 October 2013 www.aosmd.com Page 2 of 14