LM217LD datasheet by STMicroelectronics

LM217LD Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the LM217LD?
  The maximum input voltage that can be applied to the LM217LD is 30V, but it's recommended to keep it below 25V for reliable operation.
• How do I ensure the LM217LD is stable and doesn't oscillate?
  To ensure stability, make sure to use a minimum output capacitance of 10uF with an ESR (Equivalent Series Resistance) of less than 5 ohms, and a minimum input capacitance of 1uF with an ESR of less than 5 ohms.
• What is the minimum load current required for the LM217LD to regulate properly?
  The LM217LD requires a minimum load current of 5mA to regulate properly. If the load current is less than 5mA, the output voltage may not be regulated accurately.
• Can I use the LM217LD in a high-temperature environment?
  The LM217LD is rated for operation up to 125°C, but its performance may degrade at high temperatures. It's recommended to derate the output current and input voltage at high temperatures to ensure reliable operation.
• How do I protect the LM217LD from input voltage transients?
  To protect the LM217LD from input voltage transients, use a TVS (Transient Voltage Suppressor) diode or a zener diode with a voltage rating higher than the maximum input voltage, and a capacitor with a voltage rating higher than the maximum input voltage, in parallel with the input pin.