The recommended PCB layout for optimal thermal performance involves placing the AP2181MPG-13 near a thermal pad or a heat sink, and ensuring that the PCB has sufficient thermal vias to dissipate heat. A minimum of 2-3 thermal vias under the IC is recommended.
To ensure stable output voltage regulation, 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 IC and have a minimum capacitance of 1uF.
Although the datasheet specifies a maximum input voltage of 18V, it is recommended to limit the input voltage to 15V to ensure reliable operation and prevent damage to the IC.
The AP2181MPG-13 is rated for operation up to 125°C, but it is recommended to derate the output current and input voltage to ensure reliable operation at high temperatures. Consult the datasheet for derating curves and guidelines.
Output voltage instability or oscillation can be caused by inadequate output capacitance, poor PCB layout, or incorrect component selection. Check the output capacitor value and ESR, ensure proper PCB layout, and verify that the input capacitor is properly sized and placed.
AP2181MPG-13 datasheet
by Diodes Incorporated
