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MC7905ACT
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MC7905ACT

Product Overview

  • Category: Voltage Regulator
  • Use: To regulate and stabilize the output voltage in electronic circuits
  • Characteristics:
    • Negative voltage regulator
    • Fixed output voltage of -5V
    • High precision and low dropout voltage
  • Package: TO-220
  • Essence: Integrated circuit (IC)
  • Packaging/Quantity: Typically sold in reels or tubes containing multiple units

Specifications

  • Input Voltage Range: -7V to -35V
  • Output Voltage: -5V
  • Output Current: Up to 1A
  • Operating Temperature Range: -40°C to +125°C
  • Line Regulation: ±0.2%
  • Load Regulation: ±0.4%
  • Dropout Voltage: 2V (maximum)

Detailed Pin Configuration

The MC7905ACT has three pins:

  1. Input (Pin 1): Connects to the input voltage source.
  2. Ground (Pin 2): Connected to the ground reference.
  3. Output (Pin 3): Provides the regulated -5V output.

Functional Features

  • Provides a stable and regulated -5V output voltage.
  • Protects the connected circuitry from voltage fluctuations.
  • Offers thermal shutdown protection to prevent overheating.
  • Built-in short-circuit protection for added safety.

Advantages

  • High precision and accuracy in regulating the output voltage.
  • Low dropout voltage ensures efficient operation even with low input voltages.
  • Compact and easy-to-use package (TO-220).
  • Suitable for a wide range of applications requiring a negative voltage supply.

Disadvantages

  • Fixed output voltage limits flexibility in certain applications.
  • Requires external capacitors for stability and noise reduction.

Working Principles

The MC7905ACT is a negative voltage regulator that utilizes a series pass transistor to maintain a constant -5V output voltage. It compares the output voltage with a reference voltage and adjusts the current flowing through the pass transistor to regulate the output voltage.

Detailed Application Field Plans

The MC7905ACT can be used in various applications, including:

  1. Power supply circuits requiring a stable -5V output.
  2. Audio amplifiers and preamplifiers.
  3. Industrial control systems.
  4. Test and measurement equipment.
  5. Automotive electronics.

Detailed and Complete Alternative Models

Some alternative models to the MC7905ACT include:

  • LM79XX series (e.g., LM7905)
  • LT1033 series
  • UA79XX series (e.g., UA7905)

These alternatives provide similar functionality and are compatible replacements for the MC7905ACT.

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Перечислите 10 распространенных вопросов и ответов, связанных с применением MC7905ACT в технических решениях.

Sure! Here are 10 common questions and answers related to the application of MC7905ACT in technical solutions:

  1. Q: What is MC7905ACT? A: MC7905ACT is a voltage regulator IC that provides a fixed output voltage of -5V.

  2. Q: What is the input voltage range for MC7905ACT? A: The input voltage range for MC7905ACT is typically between -7V and -25V.

  3. Q: What is the maximum output current of MC7905ACT? A: The maximum output current of MC7905ACT is 1A.

  4. Q: How does MC7905ACT regulate the output voltage? A: MC7905ACT uses a series pass transistor to maintain a constant -5V output voltage, regardless of changes in input voltage or load.

  5. Q: Can MC7905ACT be used in both AC and DC applications? A: Yes, MC7905ACT can be used in both AC and DC applications as long as the input voltage falls within the specified range.

  6. Q: Is it necessary to use an external heat sink with MC7905ACT? A: It depends on the power dissipation. If the power dissipation exceeds a certain limit, using an external heat sink is recommended.

  7. Q: Can MC7905ACT handle short-circuit conditions? A: Yes, MC7905ACT has built-in short-circuit protection, which prevents damage to the IC under short-circuit conditions.

  8. Q: Can MC7905ACT be used in automotive applications? A: Yes, MC7905ACT is suitable for automotive applications as it can withstand the temperature and voltage variations commonly found in vehicles.

  9. Q: Can multiple MC7905ACT ICs be connected in parallel to increase the output current? A: No, connecting multiple MC7905ACT ICs in parallel is not recommended as it can lead to stability issues and uneven load sharing.

  10. Q: Are there any alternatives to MC7905ACT for -5V voltage regulation? A: Yes, there are other voltage regulator ICs available in the market, such as LM7905 and LT1084, which can also provide a fixed -5V output voltage.

I hope these questions and answers help! Let me know if you have any more queries.