MP38873DL-LF-Z datasheet by Monolithic Power Systems

MP38873DL-LF-Z Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance?
  The recommended PCB layout for the MP38873DL-LF-Z involves placing the input and output capacitors close to the device, using a solid ground plane, and minimizing the loop area of the power traces to reduce EMI. A 4-layer PCB with a dedicated power plane is also recommended.
• How do I select the right input and output capacitors for this device?
  The input capacitor should have a low ESR and be rated for the input voltage. A 10uF to 22uF ceramic capacitor is recommended. The output capacitor should be selected based on the output voltage and current requirements. A 10uF to 47uF ceramic capacitor is recommended. X5R or X7R dielectrics are suitable for both input and output capacitors.
• What is the maximum ambient temperature for this device?
  The maximum ambient temperature for the MP38873DL-LF-Z is 85°C. However, the device can operate up to 125°C junction temperature. The ambient temperature should be derated based on the power dissipation and thermal resistance of the device.
• How do I ensure the device is stable and does not oscillate?
  To ensure stability, the input and output capacitors should be selected based on the recommended values, and the PCB layout should be designed to minimize the loop area of the power traces. Additionally, the device should be operated within the recommended input and output voltage ranges, and the output should not be overloaded.
• What is the maximum output current capability of this device?
  The maximum output current capability of the MP38873DL-LF-Z is 3A. However, the device can deliver higher currents for short durations. The output current should be derated based on the ambient temperature and power dissipation.