A 2-layer or 4-layer PCB with a solid ground plane and thermal vias is recommended. Keep the switching node (SW pin) away from sensitive analog nodes, and use a thermal relief pattern under the IC to improve heat dissipation.
Use a high-precision voltage reference, such as the MP5025, and ensure the output voltage sense lines are properly routed and filtered. Also, minimize the output capacitor's equivalent series resistance (ESR) to reduce output voltage ripple.
A low-ESR ceramic capacitor (e.g., X5R or X7R) with a value between 4.7 μF to 10 μF is recommended. This helps to filter the input voltage and reduce the impact of input voltage ripple on the converter's performance.
Ensure the output capacitor's ESR is within the recommended range, and the output voltage sense lines are properly routed and filtered. Also, avoid using output capacitors with high ESR or high inductance, as they can cause oscillations.
The MP4568GQ-Z is rated for operation up to 85°C ambient temperature. However, for reliable operation, it's recommended to keep the ambient temperature below 70°C to ensure the IC's internal temperature remains within its specified range.
