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, and using a solid ground plane to reduce noise and EMI.
The TPS22968NDPUT has a specific power-up sequence requirement, which is to apply VCC before applying VIN. Additionally, the EN pin should be pulled high to enable the device. It's also recommended to add a capacitor between VCC and GND to filter out noise and ensure stable operation.
The internal switch of the TPS22968NDPUT is rated for a maximum continuous current of 2A, but it's recommended to derate the current based on the ambient temperature and the PCB's thermal design to ensure reliable operation.
To troubleshoot issues with the TPS22968NDPUT, start by checking the input voltage, output voltage, and current. Verify that the device is properly powered up and initialized. Check for any signs of overheating, such as excessive temperature rise or thermal shutdown. Use an oscilloscope to monitor the device's behavior and identify any anomalies. Consult the datasheet and application notes for guidance on troubleshooting specific issues.
The TPS22968NDPUT is rated for operation up to 125°C, but it's recommended to derate the device's performance based on the ambient temperature. Consult the datasheet for thermal derating information and ensure that the device is properly heatsinked to prevent overheating.
TPS22968NDPUT datasheet
by Texas Instruments
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