Given the specifications you've provided for your project using an LM5118 Buck, Buck-Boost Regulator, it sounds like you are looking for a component with a more powerful output voltage capability. Assuming you're staying within similar categories of components (DC-DC converters in this case), and looking for something with a broader or more powerful output range, here are a few general suggestions. Note that specific model recommendations will depend on your precise requirements such as input voltage range, output voltage range, output current, efficiency, footprint, and other features you might need (e.g., synchronization, soft-start, protection features).

For higher output voltage alongside higher power capabilities within the Texas Instruments portfolio (given the manufacturer specification in your project), consider looking into these families:

Please bear in mind, selecting a component with a "more powerful output voltage" vastly depends on what your application demands. This means understanding not just the voltage levels required but also the current demands of your load, as these factors together dictate the total power output ($P = V * I$, where $P$ is power, $V$ is voltage, and $I$ is current). Always ensure that the chosen component's specifications exceed your application's maximum requirements, and consider other parameters such as thermal performance, efficiency, package size, and any specific features (like synchronization, adjustable switching frequency, or thermal shutdown) that might be necessary for your design.

If you could provide more specific requirements (maximum input voltage, desired output voltage and current, etc.), I could offer a more tailored suggestion.