The maximum input voltage that the LTC3717EGN can handle is 36V, but it's recommended to keep it below 30V for reliable operation.
To minimize EMI, it's recommended to keep the input and output capacitors close to the IC, use a solid ground plane, and keep the high-frequency switching nodes (e.g. SW node) away from sensitive analog nodes.
The recommended PCB footprint for the LTC3717EGN is a 28-pin QFN package with a 4mm x 5mm body size and 0.5mm pin pitch. A thermal pad is recommended for heat dissipation.
To select the right inductor, consider the maximum current rating, inductance value, and DC resistance. A good starting point is to use an inductor with a value between 1uH to 10uH and a current rating of at least 2A.
The SYNC pin is used to synchronize the switching frequency of multiple LTC3717EGN devices in a system, allowing for reduced EMI and improved system performance.