SNVS788H January 2012 – August 2021 LM5019
The application schematic of a buck supply is shown in Figure 8-1. For output voltage (VOUT) more than one diode drop higher than the maximum regulation threshold of VCC (8.55 V, see Section 6.5), the VCC pin can be connected to VOUT through a diode (D2), to improve efficiency and reduce power dissipation in the IC.
The design example uses equations from the Section 7.3 with component names provided in the Typical Application schematic. Corresponding component designators from Figure 8-1 are also provided for each selected value.