L7981A datasheet by STMicroelectronics

L7981A Frequently Asked Questions (FAQs)

• What is the maximum input voltage that the L7981A can handle?
  The L7981A can handle input voltages up to 30V, but it's recommended to keep it below 25V for reliable operation.
• How do I ensure the L7981A is stable and doesn't oscillate?
  To ensure stability, make sure to use a minimum output capacitance of 10uF, and keep the output voltage ripple below 1% of the output voltage. Also, use a low-ESR capacitor and keep the layout clean and compact.
• What is the maximum output current that the L7981A can deliver?
  The L7981A can deliver up to 1A of output current, but it's recommended to keep it below 800mA for reliable operation and to prevent overheating.
• How do I adjust the output voltage of the L7981A?
  The output voltage of the L7981A can be adjusted by using a resistive divider network between the output and the ADJ pin. The output voltage is determined by the ratio of the resistors and the internal reference voltage.
• What is the purpose of the EN pin on the L7981A?
  The EN (enable) pin is used to turn the regulator on or off. When the EN pin is high, the regulator is enabled, and when it's low, the regulator is disabled.