MP2494DN-LF datasheet by Monolithic Power Systems

MP2494DN-LF Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance?
  A good PCB layout is crucial for optimal performance. Keep the input and output capacitors close to the IC, and use a solid ground plane to reduce noise. Avoid routing high-current traces near sensitive analog signals.
• How do I ensure stability and prevent oscillations?
  To ensure stability, ensure that the output capacitor has a low ESR, and the feedback resistors are properly selected. Also, avoid using capacitors with high ESL (Equivalent Series Inductance) in the output filter.
• What is the maximum input voltage that can be applied to the IC?
  The maximum input voltage that can be applied to the MP2494DN-LF is 28V. Exceeding this voltage may damage the IC.
• How do I calculate the output voltage ripple?
  The output voltage ripple can be calculated using the formula: ΔVout = (Iout * ESL) / (Cout * fsw), where Iout is the output current, ESL is the equivalent series inductance of the output capacitor, Cout is the output capacitance, and fsw is the switching frequency.
• What is the recommended input capacitor value and type?
  A 10uF to 22uF X5R or X7R ceramic capacitor is recommended for the input capacitor. This type of capacitor has low ESR and is suitable for high-frequency switching applications.