SNVS787I January 2012 – August 2021 LM5018
An isolated supply using LM5018 is shown in Figure 8-5. Inductor (L) in a typical buck circuit is replaced with a coupled inductor (X1). A diode (D1) is used to rectify the voltage on a secondary output. The nominal voltage at the secondary output (VOUT2) is given by Equation 20.
For output voltage (VOUT1) more than one diode drop above the maximum VCC (8.55 V), the VCC pin can be diode connected to VOUT1 for higher efficiency and low dissipation in the IC.