Texas Instruments provides a recommended PCB layout in the datasheet, but it's also important to follow general high-frequency layout guidelines, such as keeping the input and output traces short and away from each other, using a solid ground plane, and minimizing vias and thermal reliefs.
The choice of input and output capacitors depends on the specific application requirements, such as the input voltage range, output current, and desired ripple voltage. In general, X7R or X5R ceramic capacitors with a voltage rating of at least 2x the input voltage are recommended. The output capacitor should have a low ESR and be able to handle the output current.
The TPS28226DR has an operating junction temperature range of -40°C to 125°C, but the maximum ambient temperature range depends on the specific application and the thermal design of the system. In general, the ambient temperature should be kept below 85°C to ensure reliable operation.
Yes, the TPS28226DR is qualified for automotive and high-reliability applications, and it meets the requirements of the AEC-Q100 standard. However, it's essential to follow the recommended design and layout guidelines, and to perform thorough testing and validation to ensure the device meets the specific application requirements.
To troubleshoot issues with the TPS28226DR, start by checking the input voltage, output current, and output voltage to ensure they are within the recommended operating ranges. Check the PCB layout and component selection to ensure they meet the recommended guidelines. Use an oscilloscope to measure the output voltage ripple and noise, and check for any signs of overheating or thermal shutdown.
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
