MC34063ECN datasheet by STMicroelectronics

MC34063ECN Frequently Asked Questions (FAQs)

• What is the maximum input voltage that the MC34063ECN can handle?
  The maximum input voltage for the MC34063ECN 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.
• How do I set the output voltage of the MC34063ECN?
  The output voltage is set 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).
• What is the maximum output current that the MC34063ECN can provide?
  The maximum output current of the MC34063ECN is 1.5A, but it's recommended to derate the current based on the input voltage, output voltage, and ambient temperature.