The recommended PCB layout for optimal thermal performance involves placing thermal vias under the IC, using a solid ground plane, and keeping the thermal path as short as possible. A 4-layer PCB with a thermal layer is also recommended.
To ensure stability, make sure to follow the recommended component values and layout guidelines in the datasheet. Additionally, use a low-ESR output capacitor, and consider adding a small ceramic capacitor in parallel with the output capacitor to improve stability.
While the datasheet specifies an operating temperature range of -40°C to 125°C, the maximum ambient temperature for reliable operation depends on the specific application and cooling conditions. As a general guideline, it's recommended to keep the ambient temperature below 85°C for high-reliability applications.
The AP3602BKTR-G1 is rated for a maximum input voltage of 18V. While it can tolerate some voltage transients, it's not designed for high-voltage applications. If you need to operate at higher voltages, consider using a different device or adding external voltage protection circuitry.
To troubleshoot issues, start by verifying the input voltage, output voltage, and current. Check for proper PCB layout, component values, and thermal design. Use an oscilloscope to monitor the output voltage and current, and consider using a thermal camera to identify hotspots. Consult the datasheet and application notes for guidance on specific troubleshooting steps.
