The maximum input voltage that can be applied to the LTM8021IV#PBF is 36V, but it's recommended to operate within the specified input voltage range of 3.5V to 36V for optimal performance and reliability.
The LTM8021IV#PBF is rated for operation from -40°C to 125°C. Ensure good thermal design and heat sinking to keep the junction temperature below 125°C. Use thermal pads, heat sinks, or fans as needed to maintain a stable temperature.
Use a multi-layer PCB with a solid ground plane, and keep the input and output traces separate to minimize noise coupling. Place the input and output capacitors close to the device, and use a Kelvin connection for the output voltage sense lines. Avoid routing sensitive traces near the device's switching nodes.
Choose an inductor with a high saturation current rating, low DC resistance, and a suitable inductance value (e.g., 1-10μH). Ensure the inductor is rated for the maximum output current and can handle the peak-to-peak ripple current. Consult the datasheet and inductor manufacturer's recommendations for selection.
Use a low-ESR, high-frequency ceramic capacitor (e.g., X5R or X7R) with a value of 10-22μF. The capacitor should be rated for the maximum input voltage and have a low impedance at the switching frequency.
LTM8021IV#PBF datasheet
by Linear Technology
