A good PCB layout for the MAX3747AEUB+T involves keeping the input and output traces separate, using a solid ground plane, and placing the device close to the power source. Additionally, using a shielded inductor and keeping the switching node (SW) away from sensitive analog nodes can help minimize EMI.
To optimize the compensation network, start by using the recommended values in the datasheet. Then, adjust the compensation components (R1, R2, C1, and C2) based on the specific application requirements and the desired transient response. A good starting point is to set the compensation network to provide a phase margin of around 45° to 60°.
The MAX3747AEUB+T can handle input voltages up to 28V, but it's recommended to operate within the specified input voltage range of 4.5V to 24V for optimal performance and reliability.
To ensure the MAX3747AEUB+T operates within the specified junction temperature range of -40°C to 125°C, provide adequate heat sinking, use a thermally conductive PCB material, and avoid blocking airflow around the device. Additionally, consider using a thermal interface material (TIM) to improve heat transfer between the device and the heat sink.
A low-ESR ceramic capacitor (X5R or X7R dielectric) with a value of 10uF to 22uF is recommended for the input capacitor. This helps to filter out high-frequency noise and ensures stable operation.
MAX3747AEUB+T datasheet
by Maxim Integrated Products
