RQ3E100ATTB - ROHM Semiconductor

RQ3E100ATTB Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal thermal performance?
  ROHM recommends a thermal pad on the bottom of the package, connected to a large copper area on the PCB to dissipate heat efficiently. A minimum of 2oz copper thickness is recommended.
• How do I ensure stable operation with high-frequency switching?
  To ensure stable operation with high-frequency switching, it's essential to follow proper PCB layout guidelines, use a low-ESR output capacitor, and consider adding a snubber circuit to reduce ringing and overshoot.
• What is the maximum allowed voltage on the EN pin?
  The maximum allowed voltage on the EN (enable) pin is 6V, which is higher than the recommended operating voltage of 5V. However, it's essential to ensure the EN pin voltage does not exceed the maximum rating to prevent damage to the device.
• Can I use this device in a high-temperature environment?
  The RQ3E100ATTB is rated for operation up to 105°C, but it's essential to consider the derating curves and thermal management to ensure reliable operation in high-temperature environments.
• How do I calculate the output voltage ripple?
  The output voltage ripple can be calculated using the formula: ΔVout = (Iout * ESL) / (Cout * fsw), where ESL is the equivalent series inductance of the output capacitor, Cout is the output capacitance, and fsw is the switching frequency.