LMR822FVM-GTR - ROHM Semiconductor

LMR822FVM-GTR Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of LMR822FVM-GTR?
  ROHM recommends a 4-layer PCB with a solid ground plane and a separate power plane for the input and output. The input and output pins should be connected to the power plane through vias, and the ground pin should be connected to the ground plane through a via. Additionally, the PCB should have a low-ESR capacitor (e.g. 10uF) connected between the input and ground pins, and a low-ESR capacitor (e.g. 10uF) connected between the output and ground pins.
• How do I ensure the stability of the LMR822FVM-GTR in my design?
  To ensure stability, ROHM recommends that the output capacitor should be at least 10uF with an ESR of less than 100mΩ. The input capacitor should be at least 10uF with an ESR of less than 100mΩ. The PCB layout should also be designed to minimize the loop area of the input and output pins. Additionally, the input voltage should be within the recommended range, and the output current should not exceed the maximum rating.
• What is the maximum ambient temperature that the LMR822FVM-GTR can operate in?
  The maximum ambient temperature that the LMR822FVM-GTR can operate in is 85°C. However, the device can operate up to 105°C with a derated output current. It's recommended to check the thermal derating curve in the datasheet to determine the maximum output current at a given ambient temperature.
• Can I use the LMR822FVM-GTR in a high-vibration environment?
  Yes, the LMR822FVM-GTR is designed to withstand high-vibration environments. ROHM has tested the device to withstand vibrations up to 10G (10-2000Hz) and 20G (20-2000Hz) in the X, Y, and Z axes. However, it's recommended to check the vibration specifications of the device and ensure that the PCB is designed to withstand the expected vibration levels.
• How do I troubleshoot issues with the LMR822FVM-GTR in my design?
  To troubleshoot issues with the LMR822FVM-GTR, ROHM recommends checking the input voltage, output voltage, and output current. Ensure that the input voltage is within the recommended range, and the output voltage is within the specified tolerance. Check for any signs of overheating, such as excessive temperature rise or burning smell. Also, check the PCB layout for any signs of damage or corrosion. If the issue persists, contact ROHM's technical support team for further assistance.