RB298NS100TL - ROHM Semiconductor

RB298NS100TL Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal thermal performance?
  ROHM recommends a thermal pad size of 2.5mm x 2.5mm with a minimum of 10 thermal vias (0.3mm diameter) to ensure optimal heat dissipation. Additionally, a solid copper plane on the bottom layer can help to further reduce thermal resistance.
• How do I ensure stable operation with high-frequency switching?
  To ensure stable operation with high-frequency switching, ROHM recommends using a low-ESR capacitor (e.g., ceramic or film capacitor) with a value of 10uF to 100uF in parallel with the output capacitor. This helps to reduce voltage ripple and noise.
• What is the maximum allowed voltage deviation for the input voltage?
  According to ROHM, the maximum allowed voltage deviation for the input voltage is ±10% of the nominal input voltage. Exceeding this deviation may affect the regulator's performance and stability.
• Can I use this regulator in a high-temperature environment?
  The RB298NS100TL is rated for operation up to 125°C. However, ROHM recommends derating the output current and power dissipation according to the temperature derating curve provided in the datasheet to ensure reliable operation.
• How do I calculate the power dissipation of the regulator?
  The power dissipation of the regulator can be calculated using the formula: Pd = (Vin - Vout) x Iout, where Vin is the input voltage, Vout is the output voltage, and Iout is the output current. ROHM also provides a power dissipation calculation tool on their website.