A 2-layer or 4-layer PCB with a solid ground plane and a separate layer for the high-frequency switching node is recommended. Keep the high-current paths short and use a common grounding point for the input and output.
Monitor the input voltage, output current, and junction temperature to ensure they are within the specified limits. Use a thermal management system, such as a heat sink, to keep the junction temperature below 125°C.
A low-ESR ceramic or film capacitor with a value of 1-10 μF is recommended. The capacitor should be placed close to the VIN pin and have a voltage rating of at least 1.5 times the maximum input voltage.
Use a shielded enclosure, keep the switching node and output cables short, and add EMI filters or common-mode chokes to the input and output lines. Ensure good grounding and decoupling of the PCB.
The maximum allowed output capacitance is 220 μF. Exceeding this value may cause instability or oscillations in the output voltage.
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LQA20B300C Overview
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