LM2903N datasheet by STMicroelectronics

LM2903N Frequently Asked Questions (FAQs)

• What is the maximum input voltage that the LM2903N can handle?
  The LM2903N can handle input voltages up to 40V, but it's recommended to keep it below 35V 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 suitable output capacitor (e.g., 10uF) and a minimum load current of 5mA. Also, keep the input voltage at least 2V higher than the output voltage.
• Can I use the LM2903N in a high-temperature environment?
  The LM2903N is rated for operation up to 125°C, but its performance may degrade at high temperatures. Consider using a heat sink or a thermally-enhanced package (e.g., LM2903N-5.0 in a TO-220 package) for high-temperature applications.
• How do I protect the LM2903N from input voltage surges or spikes?
  Use a voltage clamp or a transient voltage suppressor (TVS) diode at the input to protect the LM2903N from voltage surges or spikes. You can also add a series resistor and a capacitor to filter out high-frequency noise.
• Can I use the LM2903N in a battery-powered device?
  Yes, the LM2903N is suitable for battery-powered devices due to its low quiescent current (IQ) of 5mA. However, consider using a low-dropout regulator (LDO) like the LD3903N for even lower IQ and better efficiency.