LTC4012 - IC SWITCHING CONTROLLER, 633 kHz SWITCHING FREQ-MAX, PQCC20, 4 X 4 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-220WGGD-1, QFN-20, Switching Regulator or Controller
The maximum input voltage that the LTC4012 can handle 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 analog nodes.
The recommended inductor value is between 1.5uH to 3.3uH, and it's recommended to use a shielded inductor with a low DCR (DC resistance) to minimize losses. A ferrite core inductor is a good option.
The output voltage of the LTC4012 is set by the resistive divider network connected to the FB (feedback) pin. The output voltage is calculated using 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 LTC4012 can deliver is 2A, but it's recommended to derate the output current based on the input voltage, output voltage, and ambient temperature to ensure reliable operation.
LTC4012IUF#PBF datasheet
by Linear Technology
