Texas Instruments provides a recommended PCB layout in the LM25101 evaluation module documentation, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure optimal performance.
To ensure reliable start-up and shutdown, it is recommended to follow the power sequencing guidelines in the datasheet, including the use of a soft-start circuit and a voltage supervisor to monitor the input voltage and ensure that the device is fully powered up before enabling the output.
The maximum allowable output capacitance for the LM25101 is not explicitly stated in the datasheet, but it is generally recommended to keep the output capacitance below 10uF to ensure stability and prevent oscillations. However, the actual maximum capacitance will depend on the specific application and output voltage, and may require additional analysis and simulation to determine.
The LM25101 is rated for operation up to 125°C, but it is recommended to derate the output current and voltage at higher temperatures to ensure reliable operation. Additionally, the device may require additional thermal management, such as heat sinking or airflow, to maintain a safe operating temperature.
To troubleshoot oscillations or instability in the LM25101 output, it is recommended to check the PCB layout for any potential issues, such as poor grounding or inadequate decoupling. Additionally, verify that the input voltage and output load are within the recommended specifications, and consider adding additional filtering or compensation components to improve stability.
LM25101CMA/NOPB datasheet
by Texas Instruments
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