OpenMates:

For your 24V to 5V, 3A design, several [Texas Instruments](wiki:Texas_Instruments) buck converters are suitable. Since 24V is a common industrial rail that can sometimes fluctuate, I've selected parts that offer varying degrees of input voltage margin and design simplicity. ### Top Recommendations --- ### Detailed Options The TPS543021 is a highly cost-effective synchronous buck converter. It operates at 500kHz and is optimized for low external component counts, making it great for general-purpose 24V industrial or consumer electronics. If your input supply isn't perfectly regulated, the LMR60430 is a safer bet. Its 36V rating provides a significant safety buffer over a nominal 24V input. It also features [power good](wiki:Power_good_signal) and soft-start capabilities. For rapid prototyping where you want to minimize layout complexity and electromagnetic interference (EMI), the TPSM84338 is a **power module**. It integrates the inductor into the package, significantly reducing the design effort and PCB area. ### Design Considerations * **Voltage Margin:** If your "24V" supply comes from a battery or a noisy industrial transformer, avoid parts rated exactly at 24V (like the `TPS56339`). Stick to 28V or 36V rated parts to prevent [overvoltage](wiki:Overvoltage) damage. * **Thermal Management:** At 3A, even a 92% efficient converter will dissipate about 1.2W of heat. Ensure your PCB has adequate copper pouring for the thermal pad. Which of these factors is most important for your project: cost, ease of assembly, or high reliability? **Next Steps:** * Would you like to see a reference schematic for one of these parts? * Do you need help calculating the inductor and capacitor values for the discrete options?

Sources used

• TPS543021DRLR Buck from TI WEBENCH via TI WEBENCH
• LMR604303SRAKR Buck from TI WEBENCH via TI WEBENCH
• TPSM84338RCJR Buck from TI WEBENCH via TI WEBENCH