MC79L12ACDG

Product Overview

Category: Linear Voltage Regulator
Use: To regulate and stabilize the output voltage in electronic circuits
Characteristics:
- Fixed output voltage of -12V
- Low dropout voltage
- High ripple rejection ratio
- Thermal shutdown protection
Package: TO-252-3 (DPAK)
Essence: Integrated circuit (IC) voltage regulator
Packaging/Quantity: Available in reels or tubes, quantity varies based on manufacturer

Specifications

Input Voltage Range: -35V to -14V
Output Voltage: -12V
Output Current: Up to 100mA
Dropout Voltage: 2V (maximum)
Ripple Rejection Ratio: 60dB (minimum)
Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The MC79L12ACDG has three pins:

Input Pin (VIN): Connects to the input voltage source.
Ground Pin (GND): Connected to the ground reference.
Output Pin (VOUT): Provides the regulated -12V output.

Functional Features

Regulates and stabilizes the output voltage at -12V.
Provides a low dropout voltage, ensuring efficient regulation even with small input-output differentials.
Offers high ripple rejection ratio, minimizing noise interference in the output voltage.
Includes thermal shutdown protection, preventing damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - Simple and cost-effective solution for voltage regulation. - Compact size and easy to integrate into various electronic circuits. - Wide operating temperature range allows for use in extreme environments.

Disadvantages: - Limited output current capability (up to 100mA). - Fixed output voltage may not be suitable for all applications. - Dropout voltage can affect efficiency in low input-output differential scenarios.

Working Principles

The MC79L12ACDG is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It compares the reference voltage (-12V) with the feedback voltage and adjusts the pass transistor accordingly to maintain a stable -12V output.

Detailed Application Field Plans

The MC79L12ACDG is commonly used in various electronic devices and circuits, including:

Power supplies: Provides regulated -12V voltage for powering analog circuitry.
Audio amplifiers: Stabilizes the negative power supply rail for audio amplification.
Industrial control systems: Ensures stable voltage for control circuitry.
Automotive electronics: Used in vehicle electrical systems for voltage regulation.

Detailed and Complete Alternative Models

LM7912: Similar characteristics and package as MC79L12ACDG, but with -12V fixed output voltage.
UA7912: Comparable specifications and pin configuration, also provides -12V output voltage.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací MC79L12ACDG v technických řešeních

Sure! Here are 10 common questions and answers related to the application of MC79L12ACDG in technical solutions:

Q: What is MC79L12ACDG? A: MC79L12ACDG is a voltage regulator IC that provides a fixed output voltage of -12V.
Q: What is the input voltage range for MC79L12ACDG? A: The input voltage range for MC79L12ACDG is typically between -35V to -20V.
Q: What is the maximum output current of MC79L12ACDG? A: The maximum output current of MC79L12ACDG is 100mA.
Q: Can MC79L12ACDG be used to regulate positive voltages? A: No, MC79L12ACDG is specifically designed to regulate negative voltages.
Q: What is the purpose of using MC79L12ACDG in a circuit? A: MC79L12ACDG is commonly used to provide a stable -12V supply voltage for various electronic components or circuits.
Q: Is it necessary to use external capacitors with MC79L12ACDG? A: Yes, it is recommended to use input and output capacitors to improve stability and transient response of the regulator.
Q: Can MC79L12ACDG handle high temperatures? A: Yes, MC79L12ACDG has a maximum operating temperature of 125°C, making it suitable for many applications.
Q: Can MC79L12ACDG tolerate reverse polarity on its input? A: No, MC79L12ACDG is not designed to handle reverse polarity. It may get damaged if connected incorrectly.
Q: Can MC79L12ACDG be used in battery-powered applications? A: Yes, MC79L12ACDG can be used in battery-powered applications as long as the input voltage is within its specified range.
Q: Are there any alternatives to MC79L12ACDG for regulating -12V? A: Yes, there are other voltage regulator ICs available in the market that can regulate -12V, such as LM7912 or LT1054.

Please note that these answers are general and may vary depending on specific datasheet specifications and application requirements.