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NJM79L05A
Product Overview
- Category: Integrated Circuit (IC)
- Use: Voltage Regulator
- Characteristics: Low Dropout, Negative Voltage Regulator
- Package: TO-92 (Through-Hole)
- Essence: Linear Regulator
- Packaging/Quantity: Tape and Reel, 2,500 units per reel
Specifications
- Input Voltage Range: -35V to -8V
- Output Voltage: -5V
- Output Current: 100mA
- Dropout Voltage: 1.7V (typical)
- Quiescent Current: 4.5mA (typical)
- Operating Temperature Range: -40°C to +125°C
Detailed Pin Configuration
The NJM79L05A has a standard three-pin configuration:
- Input Pin (VIN): Connects to the input voltage source.
- Ground Pin (GND): Connected to the ground reference.
- Output Pin (VOUT): Provides the regulated -5V output.
Functional Features
- Voltage Regulation: The NJM79L05A regulates the input voltage to a stable -5V output.
- Low Dropout: It operates with a low dropout voltage of 1.7V, allowing it to regulate even when the input voltage is close to the desired output voltage.
- Short Circuit Protection: The IC includes built-in short circuit protection, preventing damage in case of a short circuit on the output side.
- Thermal Shutdown: It incorporates thermal shutdown protection, which shuts down the device if the temperature exceeds the safe operating limit.
Advantages and Disadvantages
Advantages: - Compact TO-92 package allows for easy integration into various electronic circuits. - Low dropout voltage enables efficient voltage regulation. - Built-in short circuit and thermal protection enhance reliability.
Disadvantages: - Limited output current of 100mA may not be suitable for high-power applications. - Negative voltage regulator, limiting its use to specific applications requiring negative voltage supply.
Working Principles
The NJM79L05A 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 stable -5V output despite variations in input voltage and load conditions.
Detailed Application Field Plans
The NJM79L05A finds application in various electronic systems, including:
- Audio Amplifiers: Provides a stable -5V supply for audio amplifier circuits.
- Instrumentation: Used in precision measurement instruments requiring a negative voltage reference.
- Automotive Electronics: Suitable for automotive applications where a regulated negative voltage is needed.
- Battery-Powered Devices: Can be used in portable devices powered by batteries, ensuring a stable negative voltage supply.
Detailed and Complete Alternative Models
- LM79L05: Similar negative voltage regulator IC with identical specifications and pin configuration.
- MC79L05: Another alternative with comparable characteristics and package type.
- KA79L05: Negative voltage regulator IC offering similar performance and pin compatibility.
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Liste 10 perguntas e respostas comuns relacionadas à aplicação de NJM79L05A em soluções técnicas
Sure! Here are 10 common questions and answers related to the application of NJM79L05A in technical solutions:
Q: What is NJM79L05A? A: NJM79L05A is a voltage regulator IC that provides a fixed output voltage of -5V.
Q: What is the input voltage range for NJM79L05A? A: The input voltage range for NJM79L05A is typically between -7V and -35V.
Q: What is the maximum output current of NJM79L05A? A: The maximum output current of NJM79L05A is 100mA.
Q: Can NJM79L05A be used to regulate positive voltages? A: No, NJM79L05A is specifically designed to regulate negative voltages.
Q: How does NJM79L05A handle thermal protection? A: NJM79L05A has built-in thermal shutdown protection to prevent overheating.
Q: Can NJM79L05A be used in automotive applications? A: Yes, NJM79L05A can be used in automotive applications as long as the operating conditions are within its specified range.
Q: Is an external capacitor required for stability with NJM79L05A? A: Yes, an external capacitor is required for stability. A 0.33μF ceramic capacitor is recommended.
Q: Can NJM79L05A be used in high-frequency applications? A: NJM79L05A is not suitable for high-frequency applications due to its limited bandwidth.
Q: Can multiple NJM79L05A regulators be connected in parallel? A: Yes, multiple NJM79L05A regulators can be connected in parallel to increase the output current capability.
Q: What are some common applications of NJM79L05A? A: NJM79L05A is commonly used in various electronic devices such as audio amplifiers, power supplies, and voltage converters where a regulated -5V supply is required.
Please note that these answers are general and may vary depending on specific datasheet specifications and application requirements.