RB521CM-40T2R datasheet by ROHM Semiconductor

RB521CM-40T2R Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal thermal performance?
  A thermal pad is recommended under the IC, and a 2-layer or 4-layer PCB with a thermal relief pattern is suggested to improve heat dissipation.
• How do I ensure stable output voltage regulation?
  Use a high-quality output capacitor with low ESR, ensure a stable input voltage, and minimize noise on the VIN pin to ensure stable output voltage regulation.
• What is the maximum allowable ripple voltage on the input capacitor?
  The maximum allowable ripple voltage on the input capacitor is 10% of the input voltage to ensure stable operation.
• Can I use a ceramic capacitor for the output capacitor?
  Yes, a ceramic capacitor can be used for the output capacitor, but ensure it has a high enough capacitance value and a low enough ESR to maintain stability.
• How do I calculate the power dissipation of the IC?
  Calculate the power dissipation using the formula: Pd = (VIN - VOUT) x IOUT, where Pd is the power dissipation, VIN is the input voltage, VOUT is the output voltage, and IOUT is the output current.