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NJM79L18UA
Product Overview
- Category: Integrated Circuit (IC)
- Use: Voltage Regulator
- Characteristics: Low dropout voltage, high ripple rejection, low quiescent current
- Package: TO-92 (3-pin package)
- Essence: Linear voltage regulator
- Packaging/Quantity: Available in reels of 2,500 units
Specifications
- Input Voltage Range: -35V to -8V
- Output Voltage: -18V
- Dropout Voltage: 1.7V (typical)
- Quiescent Current: 5mA (typical)
- Ripple Rejection Ratio: 60dB (typical)
- Operating Temperature Range: -40°C to +125°C
Detailed Pin Configuration
The NJM79L18UA IC has three pins:
- Pin 1: Input (VIN) - Connects to the input voltage source.
- Pin 2: Ground (GND) - Connected to the ground reference.
- Pin 3: Output (VOUT) - Provides the regulated output voltage.
Functional Features
- Voltage Regulation: The NJM79L18UA regulates the input voltage to a stable -18V output voltage.
- Low Dropout Voltage: The device maintains regulation even when the input voltage is close to the output voltage.
- High Ripple Rejection: It effectively filters out noise and ripple present in the input voltage.
- Low Quiescent Current: The IC consumes minimal current when in standby mode, conserving power.
Advantages and Disadvantages
Advantages: - Compact and easy-to-use package - Wide operating temperature range - Good ripple rejection ratio - Low quiescent current consumption
Disadvantages: - Limited input voltage range - Dropout voltage may affect efficiency in certain applications
Working Principles
The NJM79L18UA 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 stable -18V output.
Detailed Application Field Plans
The NJM79L18UA finds applications in various electronic devices, including: 1. Power supplies for audio amplifiers 2. Battery-powered systems 3. Industrial control systems 4. Automotive electronics 5. Instrumentation equipment
Detailed and Complete Alternative Models
- LM317: Adjustable positive voltage regulator
- LM7805: Fixed 5V positive voltage regulator
- LT1086: Adjustable low dropout voltage regulator
- MC78M05: Fixed 5V positive voltage regulator
These alternative models offer similar functionality and can be used as substitutes for the NJM79L18UA in different applications.
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Wymień 10 typowych pytań i odpowiedzi związanych z zastosowaniem NJM79L18UA w rozwiązaniach technicznych
Sure! Here are 10 common questions and answers related to the application of NJM79L18UA in technical solutions:
Q: What is NJM79L18UA? A: NJM79L18UA is a voltage regulator IC that provides a fixed output voltage of -18V.
Q: What is the input voltage range for NJM79L18UA? A: The input voltage range for NJM79L18UA is typically between -35V and -5V.
Q: What is the maximum output current of NJM79L18UA? A: The maximum output current of NJM79L18UA is 100mA.
Q: Can NJM79L18UA be used in both AC and DC applications? A: Yes, NJM79L18UA can be used in both AC and DC applications.
Q: Is NJM79L18UA suitable for battery-powered devices? A: Yes, NJM79L18UA is suitable for battery-powered devices as it has low quiescent current consumption.
Q: Can NJM79L18UA handle short-circuit conditions? A: Yes, NJM79L18UA has built-in short-circuit protection to prevent damage under short-circuit conditions.
Q: Does NJM79L18UA require any external components for operation? A: Yes, NJM79L18UA requires an input capacitor and an output capacitor for stable operation.
Q: What is the operating temperature range of NJM79L18UA? A: The operating temperature range of NJM79L18UA is typically between -40°C and +125°C.
Q: Can NJM79L18UA be used in automotive applications? A: Yes, NJM79L18UA is suitable for automotive applications as it meets the required specifications.
Q: Are there any alternative voltage regulators similar to NJM79L18UA? A: Yes, there are alternative voltage regulators available in the market, such as LM79L18, MC79L18, etc., that provide a similar -18V output voltage.
Please note that these answers are general and may vary depending on the specific datasheet and application requirements of NJM79L18UA.