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MC7905ACTG
Overview
Category: Integrated Circuit (IC)
Use: Voltage Regulator
Characteristics: - Fixed Output Voltage: -5V - Maximum Output Current: 1A - Input Voltage Range: -7V to -35V - Low Dropout Voltage: 2V (typical) - Thermal Shutdown Protection - Short Circuit Protection
Package: TO-220
Essence: The MC7905ACTG is a negative voltage regulator IC that provides a fixed output voltage of -5V. It is commonly used in electronic circuits where a stable and regulated negative voltage is required.
Packaging/Quantity: The MC7905ACTG is available in a TO-220 package, which is a widely used through-hole package for power devices. It is typically sold in reels or tubes containing multiple units.
Specifications
- Output Voltage: -5V
- Output Current: 1A (maximum)
- Input Voltage Range: -7V to -35V
- Dropout Voltage: 2V (typical)
- Line Regulation: 0.07%/V (typical)
- Load Regulation: 0.1% (typical)
- Quiescent Current: 5mA (typical)
- Operating Temperature Range: -40°C to +125°C
Pin Configuration
The MC7905ACTG has three pins:
- Input Pin (Vin): This pin is connected to the input voltage source.
- Ground Pin (GND): This pin is connected to the ground reference.
- Output Pin (Vout): This pin provides the regulated -5V output voltage.
Functional Features
- Voltage Regulation: The MC7905ACTG maintains a constant -5V output voltage regardless of changes in the input voltage or load conditions.
- Thermal Shutdown Protection: The IC has built-in thermal shutdown protection, which prevents damage due to excessive temperature.
- Short Circuit Protection: The MC7905ACTG is designed to withstand short circuits at the output, ensuring the safety of the circuit and the IC itself.
Advantages and Disadvantages
Advantages: - Provides a stable and regulated -5V output voltage. - Suitable for various electronic circuits requiring a negative voltage supply. - Offers thermal shutdown and short circuit protection.
Disadvantages: - Limited output current capability (maximum 1A). - Dropout voltage of 2V may not be suitable for applications with low input voltages.
Working Principles
The MC7905ACTG is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It compares the reference voltage (-5V) with the feedback voltage from the output, adjusting the pass transistor to maintain a constant -5V output.
Application Field Plans
The MC7905ACTG can be used in various applications, including: - Power supplies requiring a regulated -5V output. - Audio amplifiers and preamplifiers. - Negative voltage biasing circuits. - Instrumentation and measurement equipment. - Industrial control systems.
Alternative Models
Some alternative models to the MC7905ACTG include: - LM7905: A similar negative voltage regulator IC manufactured by Texas Instruments. - L7905CV: Another negative voltage regulator IC produced by STMicroelectronics. - KA7905: A negative voltage regulator IC manufactured by Fairchild Semiconductor.
These alternative models have similar specifications and pin configurations, making them suitable replacements for the MC7905ACTG in various applications.
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Перечислите 10 распространенных вопросов и ответов, связанных с применением MC7905ACTG в технических решениях.
Sure! Here are 10 common questions and answers related to the application of MC7905ACTG in technical solutions:
Q: What is MC7905ACTG? A: MC7905ACTG is a voltage regulator IC (integrated circuit) that provides a fixed output voltage of -5V.
Q: What are the typical applications of MC7905ACTG? A: MC7905ACTG is commonly used in various electronic devices and circuits where a stable -5V power supply is required.
Q: How does MC7905ACTG regulate the output voltage? A: MC7905ACTG uses a series pass transistor to maintain a constant -5V output voltage, regardless of input voltage fluctuations.
Q: What is the maximum input voltage for MC7905ACTG? A: The maximum input voltage for MC7905ACTG is typically around -35V.
Q: Can MC7905ACTG handle high current loads? A: Yes, MC7905ACTG can handle currents up to 1A, making it suitable for many low to medium power applications.
Q: Is MC7905ACTG polarity sensitive? A: Yes, MC7905ACTG has a specific pinout configuration, so it is important to connect the input, ground, and output pins correctly.
Q: Does MC7905ACTG require any external components for operation? A: Yes, MC7905ACTG requires input and output capacitors for stability and filtering purposes. Refer to the datasheet for recommended values.
Q: Can MC7905ACTG tolerate short circuits or overloads? A: No, MC7905ACTG does not have built-in protection against short circuits or overloads. External protection circuitry may be required.
Q: What is the temperature range for MC7905ACTG? A: MC7905ACTG typically operates within a temperature range of -40°C to +125°C.
Q: Are there any alternatives to MC7905ACTG for -5V voltage regulation? A: Yes, there are other voltage regulator ICs available in the market, such as LM7905 and UA7905, which can also provide a fixed -5V output.
Please note that these answers are general and may vary depending on specific datasheet specifications and application requirements.