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 stability, it's essential to use a sufficient output capacitor (at least 10uF) with a low ESR (Equivalent Series Resistance) and a high ripple current rating. Additionally, the input capacitor should be placed close to the VIN pin, and the output capacitor should be placed close to the VOUT pin.
Although the datasheet specifies a maximum input voltage of 18V, it's recommended to limit the input voltage to 15V to ensure reliable operation and prevent damage to the internal components.
While PTZTE2533A is rated for operation up to 125°C, it's essential to consider the derating of the output current and power dissipation at high temperatures. ROHM recommends reducing the output current by 50% at 105°C and 75% at 115°C to ensure reliable operation.
To troubleshoot issues, start by checking the input voltage, output voltage, and output current. Verify that the input and output capacitors are properly connected and meet the recommended specifications. Check for any signs of overheating, such as excessive temperature rise or burning smells. If the issue persists, consult the ROHM Semiconductor support team for further assistance.
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