LM217LZ datasheet by STMicroelectronics

LM217LZ Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the LM217LZ?
  The maximum input voltage that can be applied to the LM217LZ is 42V, although it's recommended to keep it below 40V for reliable operation.
• How do I ensure the LM217LZ 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 10 ohms.
• What is the minimum load current required for the LM217LZ to regulate properly?
  The LM217LZ requires a minimum load current of 5mA to regulate properly. If the load current is less than this, the output voltage may not be regulated accurately.
• Can I use the LM217LZ in a high-temperature environment?
  The LM217LZ 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 LM217LZ from input voltage transients?
  To protect the LM217LZ 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, connected between the input pin and ground.