ON Semiconductor
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MC78M12CTG
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MC78M12CTG

Product Overview

  • Category: Voltage Regulator
  • Use: To regulate and stabilize the output voltage in electronic circuits
  • Characteristics:
    • Fixed output voltage of 12V
    • High accuracy and low dropout voltage
    • Thermal shutdown protection
  • Package: TO-220
  • Essence: Linear voltage regulator
  • Packaging/Quantity: Tape and Reel, 1000 units per reel

Specifications

  • Input Voltage Range: 14V to 35V
  • Output Voltage: 12V
  • Output Current: Up to 500mA
  • Dropout Voltage: 2V (maximum)
  • Line Regulation: 0.04% (typical)
  • Load Regulation: 0.1% (typical)
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The MC78M12CTG has three pins:

  1. Input Pin (Pin 1): Connects to the input voltage source.
  2. Ground Pin (Pin 2): Connected to the ground reference.
  3. Output Pin (Pin 3): Provides the regulated output voltage.

Functional Features

  • Regulates the output voltage to a fixed 12V regardless of input variations.
  • Provides thermal shutdown protection, preventing damage due to excessive temperature.
  • Offers high accuracy and low dropout voltage, ensuring stable and reliable performance.

Advantages and Disadvantages

Advantages

  • Simple and easy to use.
  • Provides a stable output voltage even with varying input voltages.
  • Offers thermal shutdown protection, enhancing safety.
  • High accuracy and low dropout voltage ensure reliable performance.

Disadvantages

  • Limited output current capacity (up to 500mA).
  • Requires an input voltage within the specified range for proper operation.

Working Principles

The MC78M12CTG is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It compares the reference voltage with the feedback voltage and adjusts the pass transistor accordingly to maintain a constant output voltage of 12V.

Detailed Application Field Plans

The MC78M12CTG is commonly used in various electronic applications, including:

  1. Power supplies for microcontrollers and other digital ICs.
  2. Automotive electronics.
  3. Industrial control systems.
  4. Audio amplifiers.
  5. Battery charging circuits.

Detailed and Complete Alternative Models

  • LM7812: Similar fixed 12V linear voltage regulator.
  • LM317: Adjustable linear voltage regulator with a wide input voltage range.
  • LT1086: Low dropout linear voltage regulator with higher output current capability.

These alternative models offer similar functionality and can be used as substitutes for the MC78M12CTG depending on specific requirements.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací MC78M12CTG v technických řešeních

Sure! Here are 10 common questions and answers related to the application of MC78M12CTG in technical solutions:

  1. Q: What is MC78M12CTG? A: MC78M12CTG is a voltage regulator integrated circuit (IC) that provides a fixed 12V output voltage.

  2. Q: What is the input voltage range for MC78M12CTG? A: The input voltage range for MC78M12CTG is typically between 14V and 35V.

  3. Q: What is the maximum output current of MC78M12CTG? A: The maximum output current of MC78M12CTG is 500mA.

  4. Q: Can MC78M12CTG handle higher input voltages than 35V? A: No, it is not recommended to exceed the specified input voltage range as it may damage the IC.

  5. Q: Is MC78M12CTG suitable for both AC and DC input voltages? A: Yes, MC78M12CTG can accept both AC and DC input voltages within the specified range.

  6. Q: Does MC78M12CTG require any external components for operation? A: Yes, MC78M12CTG requires input and output capacitors for stability and filtering purposes.

  7. Q: Can MC78M12CTG be used in automotive applications? A: Yes, MC78M12CTG is suitable for automotive applications as long as the input voltage range is within specifications.

  8. Q: What is the thermal resistance of MC78M12CTG? A: The thermal resistance of MC78M12CTG is typically around 50°C/W.

  9. Q: Can MC78M12CTG be used in high-temperature environments? A: MC78M12CTG has a maximum operating temperature of 125°C, so it can be used in moderately high-temperature environments.

  10. Q: Is MC78M12CTG available in different package options? A: Yes, MC78M12CTG is available in TO-220 and DPAK package options for different mounting preferences.

Please note that these answers are general and may vary depending on the specific datasheet and manufacturer's recommendations for MC78M12CTG.