L78M12ABDT datasheet by STMicroelectronics

L78M12ABDT Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the L78M12ABDT?
  The maximum input voltage that can be applied to the L78M12ABDT is 35V, although it's recommended to keep it below 30V for reliable operation.
• How do I ensure the L78M12ABDT is stable and doesn't oscillate?
  To ensure stability, make sure to use a minimum output capacitance of 2.2uF, and a minimum input capacitance of 0.33uF. Also, keep the input and output capacitors close to the regulator.
• What is the dropout voltage of the L78M12ABDT?
  The dropout voltage of the L78M12ABDT is around 1.5V, which means the input voltage must be at least 1.5V higher than the output voltage for proper regulation.
• Can I use the L78M12ABDT in a high-temperature environment?
  The L78M12ABDT is rated for operation up to 150°C, but its performance may degrade at high temperatures. Make sure to derate the output current and input voltage according to the datasheet's thermal derating curves.
• How do I protect the L78M12ABDT from input voltage surges?
  You can add a TVS (Transient Voltage Suppressor) diode or a zener diode in parallel with the input capacitor to protect the regulator from input voltage surges.