MPQ4558DN-LF-Z datasheet by Monolithic Power Systems

MPQ4558DN-LF-Z Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the MPQ4558DN-LF-Z?
  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, keep the output voltage within the recommended range of 0.8V to 15V.
• What is the maximum output current that the MPQ4558DN-LF-Z can deliver?
  The maximum output current is 5A, but it's recommended to keep it below 4A for reliable operation and to prevent overheating.
• How do I calculate the power dissipation of the MPQ4558DN-LF-Z?
  The power dissipation can be calculated using the formula: Pd = (Vin - Vout) x Iout. Make sure to keep the junction temperature below 125°C to prevent overheating.
• 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 power sequencing or to turn off the regulator during shutdown.