L78L09ABZ datasheet by STMicroelectronics

L78L09ABZ Frequently Asked Questions (FAQs)

• What is the maximum input voltage that the L78L09ABZ can handle?
  The maximum input voltage for the L78L09ABZ is 35V, but it's recommended to keep it below 30V for reliable operation.
• How do I ensure the stability of the output voltage?
  To ensure stability, a minimum output capacitance of 10uF is recommended, and the ESR (Equivalent Series Resistance) should be less than 5 ohms.
• What is the maximum current that the L78L09ABZ can supply?
  The L78L09ABZ can supply up to 100mA of output current, but it's recommended to derate the current based on the ambient temperature and input voltage.
• How do I protect the L78L09ABZ from overheating?
  To prevent overheating, ensure good heat sinking, keep the device away from high-temperature sources, and avoid high-input voltage and high-output current combinations.
• Can I use the L78L09ABZ in a switching regulator application?
  No, the L78L09ABZ is a linear voltage regulator and not suitable for switching regulator applications. It's designed for low-dropout, low-noise, and high-PSRR applications.