Texas Instruments provides a recommended PCB layout in the datasheet, but it's also important to follow general best practices for switching regulator layout, such as keeping the input and output capacitors close to the IC, using a solid ground plane, and minimizing trace lengths and widths.
The datasheet provides a list of recommended inductors, but you can also use the following guidelines: choose an inductor with a high saturation current rating, low DC resistance, and a suitable inductance value (typically between 1-10uH). You can also use online inductor selection tools or consult with the inductor manufacturer.
The datasheet specifies an operating junction temperature range of -40°C to 125°C, but the maximum ambient temperature range depends on the specific application and cooling conditions. As a general rule, you should derate the device's power dissipation at higher ambient temperatures to ensure reliable operation.
Yes, the TPS62221DDCT is qualified for automotive and high-reliability applications, but you should ensure that your design meets the specific requirements of the application, such as AEC-Q100 or IATF 16949. You may also need to perform additional testing and validation to meet the required standards.
Start by checking the PCB layout and component selection to ensure they meet the recommended guidelines. Use an oscilloscope to measure the output voltage and current, and check for signs of oscillation or instability. You can also use Texas Instruments' online resources, such as the Power Management Lab, to troubleshoot common issues.
TPS62221DDCT datasheet
by Texas Instruments
