LTC-4624JS - Lite-On

LTC-4624JS Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal thermal performance?
  A 2-layer or 4-layer PCB with a solid ground plane and thermal vias under the IC is recommended. This helps to dissipate heat efficiently and reduce thermal resistance.
• How do I ensure reliable start-up and shutdown of the LTC-4624JS?
  Ensure that the input voltage rises and falls monotonically, and that the enable pin is properly biased during start-up and shutdown. A soft-start circuit can also be used to reduce inrush current.
• What is the maximum allowable voltage on the output pins?
  The maximum allowable voltage on the output pins is 6V, which is the absolute maximum rating. Exceeding this voltage can damage the device.
• How do I minimize electromagnetic interference (EMI) in my design?
  Use a shielded inductor, keep the switching node (SW) away from sensitive nodes, and use a common-mode choke to reduce EMI. Additionally, ensure that the PCB layout is optimized for minimal radiation.
• What is the recommended input capacitor type and value?
  A low-ESR ceramic capacitor with a value of 10uF to 22uF is recommended. This helps to filter out high-frequency noise and reduce input ripple.