L4972A datasheet by STMicroelectronics

L4972A Frequently Asked Questions (FAQs)

• What is the maximum input voltage that the L4972A can handle?
  The L4972A can handle input voltages up to 40V, but it's recommended to keep it below 35V for reliable operation.
• How do I choose the right output capacitor for the L4972A?
  The output capacitor should be chosen based on the output voltage and current requirements. A general rule of thumb is to use a capacitor with a value between 10uF to 100uF, and a voltage rating of at least 1.5 times the output voltage.
• What is the purpose of the bootstrap capacitor (CBOOT) in the L4972A?
  The bootstrap capacitor (CBOOT) is used to generate the high-side gate drive voltage for the internal power MOSFET. It should be a low-ESR ceramic capacitor with a value between 10nF to 100nF.
• How do I calculate the output voltage of the L4972A?
  The output voltage of the L4972A can be calculated using the formula: Vout = (R1 / R2) * (1.235V), where R1 and R2 are the resistors in the feedback network.
• What is the maximum output current that the L4972A can deliver?
  The L4972A can deliver up to 3A of output current, but it's recommended to derate the output current based on the input voltage and ambient temperature.