L4963D datasheet by STMicroelectronics

L4963D Frequently Asked Questions (FAQs)

• What is the maximum input voltage that the L4963D can handle?
  The L4963D can handle a maximum input voltage of 40V, but it's recommended to keep it below 36V for reliable operation.
• How do I choose the right inductor value for my application?
  The inductor value depends on the output voltage, output current, and switching frequency. A good starting point is to use the inductor value calculation formula provided in the datasheet, and then adjust based on the specific application requirements.
• What is the purpose of the EN pin, and how do I use it?
  The EN (enable) pin is used to turn the device on and off. It's an active-high input, so connect it to a logic high (e.g., VCC) to enable the device, and connect it to a logic low (e.g., GND) to disable it.
• How do I ensure the L4963D operates within the recommended operating junction temperature range?
  Ensure good thermal design, including a suitable PCB layout, adequate heat sinking, and sufficient airflow. Monitor the device temperature using a thermocouple or thermal camera, and adjust the design as needed to keep the junction temperature below 150°C.
• What are the key considerations for PCB layout and component placement when using the L4963D?
  Keep the input and output capacitors close to the device, use a solid ground plane, and minimize the length of the high-current paths. Place the inductor and diode close to the device, and ensure good thermal connectivity between the device and the PCB.