The recommended PCB layout for the MAX1473EUI-T involves keeping the input and output traces as short as possible, using a solid ground plane, and placing the device close to the power source. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane to minimize noise and EMI.
To ensure proper power-up and initialization, the MAX1473EUI-T requires a power-on reset (POR) circuit to ensure that the internal voltage regulators are properly enabled. Additionally, the EN pin should be tied to a logic high to enable the device. It's also recommended to add a 10uF capacitor between the VIN pin and GND to filter out any noise on the input voltage.
The MAX1473EUI-T is capable of delivering up to 1.5A of current to the load, depending on the input voltage and the output voltage setting. However, it's recommended to derate the current output based on the ambient temperature and the PCB layout to ensure reliable operation.
The output voltage of the MAX1473EUI-T can be adjusted by connecting a resistive divider network between the VOUT pin and the GND pin. The resistive divider network sets the output voltage based on the ratio of the resistors. The output voltage can be calculated using the formula: VOUT = (R1 / (R1 + R2)) * VIN, where R1 and R2 are the resistors in the divider network.
The MAX1473EUI-T has a built-in thermal shutdown feature that shuts down the device when the junction temperature exceeds 150°C. This feature helps prevent damage to the device due to overheating.
MAX1473EUI-T datasheet
by Maxim Integrated Products
