It is recommended to follow the layout and placement guidelines provided in the datasheet, including keeping the input and output capacitors close to the device, using a solid ground plane, and minimizing trace lengths and widths to reduce noise and parasitic inductance.
Choose capacitors with low ESR, high ripple current rating, and a voltage rating that exceeds the maximum input voltage. X5R or X7R ceramic capacitors are recommended. The output capacitor should be at least 10uF, and the input capacitor should be at least 4.7uF.
The maximum ambient temperature range for the TPS3838E18DBVR is -40°C to 125°C. However, the device's performance and reliability may degrade at extreme temperatures, so it's recommended to operate within a narrower range (e.g., 0°C to 85°C) for optimal performance.
Yes, the TPS3838E18DBVR is qualified for automotive and high-reliability applications. It meets the requirements of the AEC-Q100 standard for automotive applications and is suitable for use in harsh environments.
To troubleshoot issues with the TPS3838E18DBVR, check the input voltage, output load, and PCB layout for any errors or inconsistencies. Verify that the device is properly soldered and that the input and output capacitors are properly selected and placed. Use an oscilloscope to measure the output voltage and current, and check for any signs of overheating or thermal shutdown.
TPS3838E18DBVR datasheet
by Texas Instruments
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