MC34063EBN datasheet by STMicroelectronics

MC34063EBN Frequently Asked Questions (FAQs)

• What is the maximum input voltage that the MC34063EBN can handle?
  The maximum input voltage is 40V, but it's recommended to keep it below 35V for reliable operation.
• How do I choose the right inductor value for my application?
  The inductor value depends on the output voltage, current, and switching frequency. A good starting point is to use the inductor value calculation formula provided in the datasheet, and then adjust based on the specific application requirements.
• What is the purpose of the compensation pin (pin 5) and how do I use it?
  The compensation pin is used to stabilize the internal voltage regulator. A capacitor (typically 10nF to 100nF) should be connected between the compensation pin and ground to ensure stability.
• Can I use the MC34063EBN in a synchronous rectification configuration?
  No, the MC34063EBN is not designed for synchronous rectification. It's intended for use with an external diode or Schottky diode for rectification.
• How do I calculate the output voltage of the MC34063EBN?
  The output voltage is determined by the ratio of the resistors R1 and R2 connected to the feedback pin (pin 4). The formula is: Vout = 1.25V x (1 + R2/R1).