MC34063ABN datasheet by STMicroelectronics

MC34063ABN Frequently Asked Questions (FAQs)

• What is the maximum input voltage that the MC34063ABN 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 selection guide in the datasheet or online calculators. Typically, a value between 10uH to 100uH is suitable for most applications.
• What is the purpose of the compensation capacitor (Cc) and how do I choose its value?
  The compensation capacitor (Cc) is used to stabilize the voltage regulator. The value of Cc depends on the output voltage, inductor value, and switching frequency. A good starting point is to use the value recommended in the datasheet (typically 10nF to 100nF).
• How do I ensure the MC34063ABN operates within the recommended operating frequency range?
  The operating frequency range is typically between 100kHz to 500kHz. To ensure the device operates within this range, choose the correct values for the oscillator resistors (Rt and Ct) and the inductor value. The datasheet provides a formula to calculate the oscillator frequency.
• What is the maximum output current that the MC34063ABN can deliver?
  The maximum output current depends on the input voltage, output voltage, and inductor value. Typically, the MC34063ABN can deliver up to 1.5A, but it's recommended to derate the output current based on the ambient temperature and input voltage.