Ensure the component has a "Model" attached in its properties. If it says "No Simulator Model," the library might only be for PCB footprints.
Once installed, you can find the component by searching for "LM2596" in the Pick Devices (P) window. Adjustable Output proteus lm2596 library
The LM2596 has several key features that make it a popular choice among designers: Ensure the component has a "Model" attached in
: Much higher than linear regulators (e.g., LM7805) because it switches rather than dissipating excess voltage as heat. proteus lm2596 library
This is the most common issue with the LM2596 in Proteus. The simulator struggles to resolve the rapid switching transients.