L7808CV datasheet by STMicroelectronics

L7808CV Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the L7808CV?
  The maximum input voltage that can be applied to the L7808CV is 35V, but it's recommended to keep it below 25V for reliable operation.
• How do I ensure the L7808CV is stable and doesn't oscillate?
  To ensure stability, make sure to use a minimum output capacitance of 10uF, and keep the input capacitance as close to the regulator as possible. Also, use a low-ESR capacitor for the output.
• Can I use the L7808CV in a high-temperature environment?
  The L7808CV is rated for operation up to 125°C, but its performance may degrade at high temperatures. Be sure to derate the output current and consider using a heat sink if operating in high-temperature environments.
• How do I protect the L7808CV from input voltage transients?
  Use a TVS (transient voltage suppressor) diode or a varistor in parallel with the input capacitor to protect the regulator from voltage transients and spikes.
• Can I use the L7808CV in a switching regulator application?
  No, the L7808CV is a linear regulator and not suitable for switching regulator applications. It's designed to provide a stable output voltage from a higher input voltage.