LD39115J28R datasheet by STMicroelectronics

LD39115J28R Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal thermal performance?
  STMicroelectronics recommends a 2-layer or 4-layer PCB with a solid ground plane and a thermal relief pattern under the IC to ensure optimal thermal performance.
• How do I ensure reliable startup and shutdown of the LD39115J28R?
  To ensure reliable startup and shutdown, ensure that the input voltage rises and falls monotonically, and add a soft-start circuit to limit the inrush current. Also, add a capacitor to filter the input voltage and reduce noise.
• What is the maximum allowed voltage on the EN pin?
  The maximum allowed voltage on the EN pin is 6V. Exceeding this voltage may damage the IC. It's recommended to use a voltage divider or a level shifter to ensure the EN pin voltage remains within the specified range.
• How do I optimize the LD39115J28R for low standby power consumption?
  To optimize the LD39115J28R for low standby power consumption, ensure that the input voltage is as low as possible, and use a low-quiescent-current LDO regulator. Also, consider using a power gating technique to turn off the IC when not in use.
• What is the recommended input capacitor value and type for the LD39115J28R?
  The recommended input capacitor value is 10uF to 22uF, and the type should be a low-ESR ceramic capacitor, such as X5R or X7R, to ensure stable operation and minimize noise.