The maximum input voltage that the LTC3639 can handle is 40V, but it's recommended to keep it below 36V for reliable operation.
To optimize the layout for the LTC3639, keep the input and output capacitors close to the IC, use a solid ground plane, and minimize the loop area of the input and output traces to reduce EMI.
The recommended input capacitor value is 10uF to 22uF, and it's recommended to use a low-ESR ceramic capacitor, such as X5R or X7R, to minimize voltage ripple and ensure stable operation.
The output voltage of the LTC3639 is set by the resistive divider network connected to the FB pin. The output voltage can be calculated using the formula: Vout = 0.8V x (R1 + R2) / R2.
The maximum output current that the LTC3639 can deliver is 3A, but it's recommended to keep it below 2.5A for reliable operation and to ensure that the junction temperature remains within the specified range.
