LM338K datasheet by STMicroelectronics

LM338K Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the LM338K?
  The maximum input voltage that can be applied to the LM338K is 40V. Exceeding this voltage can cause damage to the device.
• How do I ensure the stability of the output voltage in the LM338K?
  To ensure stability, a minimum output capacitance of 10uF is recommended, and the output capacitor should be located close to the device. Additionally, the input capacitor should be at least 10uF to prevent oscillations.
• What is the maximum output current that the LM338K can deliver?
  The maximum output current that the LM338K can deliver is 5A. However, the device can deliver up to 7A for short periods of time, but this may reduce its lifespan.
• How do I protect the LM338K from overheating?
  To protect the LM338K from overheating, ensure good heat sinking, and keep the device away from high-temperature sources. The device has a built-in thermal shutdown that turns off the output when the junction temperature exceeds 150°C.
• Can I use the LM338K in a switching regulator application?
  No, the LM338K is a linear voltage regulator and is not suitable for switching regulator applications. It is designed to provide a stable output voltage in linear regulator circuits.