LM2940CT-12 datasheet by Texas Instruments

LM2940CT-12 Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the LM2940CT-12?
  The maximum input voltage that can be applied to the LM2940CT-12 is 26V, but it's recommended to keep it below 20V for reliable operation.
• How do I ensure the output voltage is stable and regulated?
  To ensure a stable output voltage, make sure to use a minimum of 10uF capacitor at the input and a minimum of 22uF capacitor at the output, and keep the input voltage above the dropout voltage (around 1.5V).
• What is the minimum input voltage required for the LM2940CT-12 to operate?
  The minimum input voltage required for the LM2940CT-12 to operate is around 7.5V, but it's recommended to keep it above 8V for reliable operation.
• Can I use the LM2940CT-12 in a high-temperature environment?
  The LM2940CT-12 is rated for operation up to 125°C, but it's recommended to derate the output current and input voltage as the temperature increases to ensure reliable operation.
• How do I protect the LM2940CT-12 from input voltage transients?
  To protect the LM2940CT-12 from input voltage transients, use a TVS diode or a transient voltage suppressor at the input, and consider adding a fuse or a PTC resettable fuse for overcurrent protection.