Panasonic recommends a 4-layer PCB with a solid ground plane, and a separate power plane for the input and output. The input and output capacitors should be placed as close as possible to the IC, and the PCB traces should be kept short and wide to minimize inductance and resistance.
To ensure stability, Panasonic recommends using an output capacitor with a low ESR (Equivalent Series Resistance) and a high ripple current rating. The output capacitor should be placed close to the IC, and the PCB layout should be designed to minimize the loop area of the output capacitor and the IC.
Although the datasheet specifies a maximum input voltage of 18V, Panasonic recommends limiting the input voltage to 15V to ensure reliable operation and to prevent damage to the IC.
Panasonic recommends using a thermal pad or a heat sink to dissipate heat generated by the IC. The thermal pad or heat sink should be connected to a solid ground plane to ensure effective heat dissipation. Additionally, the PCB layout should be designed to minimize thermal resistance and to ensure good airflow around the IC.
Panasonic recommends using a 10uF to 22uF ceramic capacitor with a voltage rating of 25V or higher as the input capacitor. The capacitor should be placed close to the IC and should have a low ESR to minimize voltage ripple and noise.
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AXT438124 Overview
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