The maximum input voltage that can be applied to the LTC3447EDD is 18V, but it's recommended to keep it below 15V for optimal performance and reliability.
To minimize EMI and noise, it's recommended to follow a star-ground configuration, keep the input and output capacitors close to the IC, and use a solid ground plane. Additionally, use a shielded inductor and keep the switching node (SW pin) away from sensitive nodes.
The recommended inductor value is between 1.5uH to 3.3uH, and a shielded inductor with a low DCR (DC resistance) is recommended. The inductor type should be able to handle the peak current and have a high saturation current rating.
The output voltage of the LTC3447EDD can be adjusted by changing the resistive divider ratio between the VOUT pin and the GND pin. The output voltage is determined by the formula: VOUT = 0.8V x (R1 + R2) / R2, where R1 and R2 are the resistors in the divider network.
The maximum output current that the LTC3447EDD can deliver is 2A, but it's recommended to keep it below 1.5A for optimal performance and reliability.
LTC3447EDD#TRPBF datasheet
by Linear Technology
