LM2940S-5.0/NOPB datasheet by Texas Instruments

LM2940S-5.0/NOPB Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the LM2940S-5.0/NOPB?
  The maximum input voltage that can be applied to the LM2940S-5.0/NOPB is 26V, but it's recommended to keep it below 20V for reliable operation.
• Can I use the LM2940S-5.0/NOPB in a high-temperature environment?
  The LM2940S-5.0/NOPB is rated for operation up to 125°C, but the output voltage may decrease at high temperatures. It's recommended to derate the output current at high temperatures.
• How do I ensure the stability of the output voltage?
  To ensure stability, use a minimum output capacitance of 10uF, and keep the output capacitor close to the regulator. Also, ensure that the input capacitor is at least 10uF and is placed close to the input pin.
• Can I use the LM2940S-5.0/NOPB in a low-dropout application?
  The LM2940S-5.0/NOPB has a dropout voltage of around 1.5V, so it's not suitable for low-dropout applications. Consider using a low-dropout regulator like the TLV703 or TPS63051 instead.
• How do I protect the LM2940S-5.0/NOPB from input voltage transients?
  Use a TVS diode or a transient voltage suppressor (TVS) in parallel with the input capacitor to protect the regulator from input voltage transients.