For optimal thermal performance, it is recommended to use a 2-layer or 4-layer PCB with a solid ground plane on the bottom layer, and to place thermal vias under the IC to dissipate heat efficiently.
To ensure stable output voltage regulation, it is essential to follow the recommended input and output capacitor values, and to decouple the input and output pins with ceramic capacitors. Additionally, the output voltage should be set using a resistive divider network.
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 to prevent damage to the internal components.
The AP22811BM8-13 is rated for operation up to 125°C, but it is essential to consider the derating curves and thermal management to ensure reliable operation in high-temperature environments.
To troubleshoot output voltage instability or oscillation issues, check the PCB layout for any signs of noise coupling, ensure that the input and output capacitors are properly decoupled, and verify that the output voltage is set correctly using a resistive divider network.
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