Figure 9-17 shows the schematic diagram of a single-output synchronous buck regulator with an output voltage of 5 V and a rated load current of 10 A. In this example, the target half-load and full-load efficiencies are 97% and 95%, respectively, based on a nominal input voltage of 12 V that ranges from 5.5 V to 36 V. The switching frequency is set at 440 kHz by resistor R_RT. The 5-V output is connected to VCCX to reduce IC bias power dissipation and improve efficiency. An output voltage of 3.3 V is also feasible simply by connecting FB to VDDA (tie VCCX to GND in this case).