ROHM recommends a thermal pad on the bottom of the package, connected to a large copper area on the PCB to dissipate heat efficiently. A minimum of 2oz copper thickness is recommended, and the thermal pad should be connected to a ground plane to reduce thermal resistance.
To ensure output voltage stability, it is recommended to use a high-quality output capacitor with low ESR (Equivalent Series Resistance) and a minimum capacitance of 10uF. Additionally, the input capacitor should be placed close to the VIN pin to reduce noise and ripple.
Although the datasheet specifies a maximum input voltage of 18V, ROHM recommends limiting the input voltage to 15V to ensure reliable operation and to prevent damage to the internal components.
While PTZTE2522B is rated for operation up to 125°C, it is recommended to derate the output current and input voltage at high temperatures to ensure reliable operation. ROHM provides a thermal derating curve in the datasheet to help designers determine the maximum output current and input voltage at different temperatures.
To troubleshoot issues with PTZTE2522B, start by checking the input voltage, output voltage, and output current using an oscilloscope or a multimeter. Verify that the input and output capacitors are properly connected and meet the recommended specifications. Check for any signs of overheating, such as a hot thermal pad or a high junction temperature. Consult the datasheet and application notes for guidance on troubleshooting and debugging.
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