LM219D datasheet by STMicroelectronics

LM219D Frequently Asked Questions (FAQs)

• What is the maximum input voltage that the LM219D can handle?
  The LM219D can handle input voltages up to 40V, but it's recommended to keep it below 30V for optimal performance and reliability.
• How do I ensure stability and prevent oscillations in the LM219D?
  To ensure stability, make sure to follow the recommended PCB layout and component placement guidelines, and add a 10nF capacitor between the output and ground pins. Also, use a low-ESR output capacitor and keep the input and output capacitors close to the device.
• What is the minimum input voltage required for the LM219D to operate?
  The minimum input voltage required for the LM219D to operate is 7.5V, but it's recommended to keep it above 8V for optimal performance.
• Can I use the LM219D in a high-temperature environment?
  The LM219D is rated for operation up to 125°C, but it's recommended to derate the output current and voltage at higher temperatures to ensure reliability. Consult the datasheet for thermal derating guidelines.
• How do I calculate the output voltage of the LM219D?
  The output voltage of the LM219D can be calculated using the formula: Vout = (1 + R2/R1) * Vref, where R1 and R2 are the feedback resistors, and Vref is the internal reference voltage (2.5V).