STMicroelectronics recommends a 2-layer or 4-layer PCB with a solid ground plane and thermal vias to dissipate heat efficiently. A minimum of 2 oz copper thickness is recommended for optimal thermal performance.
To ensure reliable operation in high-temperature environments, it's essential to follow the recommended thermal design guidelines, use a suitable thermal interface material, and ensure good airflow around the device. Additionally, consider using a heat sink or thermal management system to keep the junction temperature below 150°C.
STMicroelectronics recommends using X7R or X5R ceramic capacitors with a voltage rating of 10V or higher for input and output capacitors. The recommended capacitance values are 10uF for input and 22uF for output.
To troubleshoot issues with the overcurrent protection feature, check the input voltage, output current, and sense resistor values. Ensure that the sense resistor is correctly connected and that the output current is within the specified range. Also, verify that the device is not overheating, which can trigger the overcurrent protection feature.
The recommended startup sequence for the PD57045S-E is to first apply the input voltage, followed by the enable signal. This ensures that the device is properly biased and configured before enabling the output.
PD57045S-E datasheet
by STMicroelectronics
