MP8666DN-LF-Z datasheet by Monolithic Power Systems

MP8666DN-LF-Z Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance?
  The recommended PCB layout for the MP8666DN-LF-Z involves placing the input and output capacitors close to the IC, using a solid ground plane, and minimizing the loop area of the high-frequency current paths. A 4-layer PCB with a dedicated power plane and a solid ground plane is 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 have a low ESR and be rated for the output voltage. A 10uF to 22uF ceramic capacitor is recommended. The capacitor selection should also consider the ripple current rating and the voltage rating.
• What is the thermal derating for this device?
  The thermal derating for the MP8666DN-LF-Z is typically 1.5% per degree Celsius above 25°C. This means that the maximum output current will decrease by 1.5% for every degree Celsius above 25°C.
• How do I implement overcurrent protection with this device?
  The MP8666DN-LF-Z has a built-in overcurrent protection feature that can be enabled by connecting a resistor from the OCP pin to the GND pin. The value of the resistor determines the overcurrent threshold. A typical value is 10kΩ to 20kΩ.
• What is the recommended input voltage range for this device?
  The recommended input voltage range for the MP8666DN-LF-Z is 4.5V to 18V. Operating the device outside of this range may affect its performance and reliability.