L6997S datasheet by STMicroelectronics

L6997S Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the L6997S?
  The maximum input voltage that can be applied to the L6997S is 42V, but it's recommended to keep it below 40V to ensure 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 recommended in the datasheet, and then adjust it based on the specific requirements of your application.
• 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 or off. When the EN pin is high, the device is enabled, and when it's low, the device is disabled. You can use this pin to implement power sequencing or to turn off the device when it's not needed.
• How do I ensure the L6997S operates within the recommended junction temperature range?
  To ensure the L6997S operates within the recommended junction temperature range, you should provide adequate heat sinking, use a thermally conductive PCB material, and avoid operating the device at high ambient temperatures or with high power dissipation.
• What is the recommended PCB layout for the L6997S?
  The recommended PCB layout for the L6997S involves keeping the high-frequency nodes (such as the switch node and the inductor) as close as possible to the device, using a solid ground plane, and minimizing the length of the traces to reduce EMI and noise.