threshold. Also, the TPS54040A is pin-to-pin compatible with the TPS54140A, TPS54240, TPS54340, and TPS54540, which all have the same specifications of the TPS54040A with respectively 1.5 A, 2.5 A, 3.5 A, and 5 A capability. The schematic of the DC-DC buck converter is shown in Figure 7. V3.3 R1 560 1 D1
