LM317K datasheet by STMicroelectronics

LM317K Frequently Asked Questions (FAQs)

• What is the minimum input voltage required for the LM317K to operate?
  The minimum input voltage required for the LM317K to operate is 3V above the output voltage. For example, if the output voltage is 5V, the minimum input voltage would be 8V.
• How do I ensure stability and prevent oscillations in the LM317K?
  To ensure stability and prevent oscillations, a minimum output capacitance of 1uF is recommended. Additionally, the input capacitor should be at least 10uF to prevent oscillations.
• What is the maximum current that the LM317K can deliver?
  The maximum current that the LM317K can deliver is 1.5A. However, it's recommended to derate the current to 1A or less to ensure reliable operation.
• Can I use the LM317K as a negative voltage regulator?
  No, the LM317K is designed to regulate positive voltages only. If you need a negative voltage regulator, you should consider using a different IC, such as the LM337.
• How do I adjust the output voltage of the LM317K?
  The output voltage of the LM317K can be adjusted by using a resistive divider network between the output and the adjust pin. The output voltage is determined by the ratio of the resistors and the reference voltage (1.25V).