The LT8490 can handle input voltages up to 40V, but it's recommended to keep it below 36V for optimal performance and reliability.
To minimize EMI, keep the input and output capacitors close to the IC, use a solid ground plane, and keep the high-current paths short and direct. Also, consider using a shielded inductor and orienting the IC to minimize radiation.
The recommended PCB footprint for the LT8490 is a 4-layer board with a solid ground plane, and a thermal pad connected to the ground plane. The IC should be placed near the input capacitors and the output inductor.
Select an inductor with a high saturation current rating, low DC resistance, and a high self-resonant frequency. The inductor value should be chosen based on the output voltage, output current, and switching frequency.
The maximum ambient temperature for the LT8490 is 85°C, but it can be derated for higher temperatures. Consult the datasheet for thermal derating information.
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