The maximum input voltage that can be applied to the LTC3639EMSE is 15V, but it's recommended to keep it below 12V 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-frequency switching nodes (e.g., LX and SW) away from sensitive analog nodes. Also, use a shielded inductor and orient it to minimize radiation.
A low-ESR ceramic capacitor (e.g., X5R or X7R) with a value between 10uF to 22uF is recommended for the output capacitor. This helps to reduce output voltage ripple and improve transient response.
The output voltage of the LTC3639EMSE can be adjusted by changing the resistor divider ratio (R1 and R2) connected to the FB pin. Use the formula: Vout = 0.8V x (1 + R2/R1) to calculate the desired output voltage.
The maximum ambient temperature range for the LTC3639EMSE is -40°C to 125°C. However, the device's performance and reliability may degrade at extreme temperatures, so it's recommended to operate it within a range of -20°C to 85°C for optimal performance.
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