RT8293BHZSP - RICHTEK

RT8293BHZSP Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal thermal performance?
  A 4-layer PCB with a solid ground plane and thermal vias is recommended. Keep the switching node (SW) away from sensitive analog nodes, and use a thermal relief pattern under the IC to improve heat dissipation.
• How do I ensure stable operation with a high-ESR output capacitor?
  Use a capacitor with an ESR < 10 ohms. Add a 1-2nF ceramic capacitor in parallel with the output capacitor to improve stability. Ensure the output capacitor is placed close to the IC and connected to the output pin with a short, low-impedance path.
• What is the recommended input capacitor type and value?
  Use a low-ESR, high-frequency ceramic capacitor (e.g., X5R or X7R) with a value between 4.7uF to 10uF. Place the capacitor close to the VIN pin and ensure a low-impedance path to the input pin.
• How do I optimize the inductor selection for the RT8293BHZSP?
  Choose an inductor with a high saturation current rating (>2x the peak current), low DCR (<100mΩ), and a core material with low core loss (e.g., ferrite or powdered iron). Aim for an inductance value between 1.5uH to 3.3uH.
• What is the recommended layout for the feedback network?
  Keep the feedback network short and direct, with minimal trace length and no vias. Use a single-point ground connection for the feedback resistors and capacitors. Ensure the feedback pin is not routed near noisy signals or switching nodes.