MPQ4459DQT-LF-Z datasheet by Monolithic Power Systems

MPQ4459DQT-LF-Z Frequently Asked Questions (FAQs)

• What is the maximum input voltage that the MPQ4459DQT-LF-Z can handle?
  The maximum input voltage is 26V, but it's recommended to keep it below 24V for reliable operation.
• How do I ensure the stability of the output voltage?
  To ensure stability, make sure to use a minimum output capacitance of 10uF, and a maximum ESR of 1 ohm. Also, use a low-ESR ceramic capacitor for the output filter capacitor.
• What is the maximum output current that the MPQ4459DQT-LF-Z can provide?
  The maximum output current is 3A, but it's recommended to keep it below 2.5A for reliable operation and to prevent overheating.
• How do I calculate the power dissipation of the MPQ4459DQT-LF-Z?
  The power dissipation can be calculated using the formula: Pd = (Vin - Vout) x Iout. Make sure to consider the thermal resistance and junction temperature to ensure reliable operation.
• What is the purpose of the EN pin, and how do I use it?
  The EN (enable) pin is used to turn the regulator on or off. Connect it to Vin to enable the regulator, or to GND to disable it. You can also use it to implement a power-saving feature in your design.