Texas Instruments provides a recommended PCB layout in the datasheet, but it's also recommended to follow general high-frequency PCB design guidelines, such as using a solid ground plane, minimizing trace lengths, and using vias to connect the input and output capacitors to the ground plane.
To ensure stability, follow the recommended component values and PCB layout, and make sure the input and output capacitors are properly selected and placed. Additionally, ensure that the feedback resistors are properly sized and that the loop gain is sufficient. If oscillations occur, try adding a small capacitor (e.g., 10nF) in parallel with the feedback resistors.
The maximum input voltage is not explicitly stated in the datasheet, but it's recommended to keep the input voltage below 42V to ensure reliable operation. Exceeding this voltage may cause internal damage or affect the device's performance.
The LM5026SDX/NOPB is rated for operation up to 125°C, but it's essential to consider the thermal design and ensure that the device is properly heat-sinked to prevent overheating. Additionally, the device's performance may degrade at high temperatures, so it's recommended to consult the datasheet and perform thermal simulations to ensure reliable operation.
To troubleshoot issues, start by verifying the input voltage, output voltage, and current. Check the PCB layout and component values to ensure they match the recommended design. Use an oscilloscope to monitor the output voltage and current, and look for signs of oscillation or instability. If issues persist, consult the datasheet and application notes, or contact Texas Instruments support for further assistance.
LM5026SDX/NOPB datasheet
by Texas Instruments
