NJM78LR05BD# - English Editing Encyclopedia Entry
Product Overview
Category: Integrated Circuit (IC)
Use: Voltage Regulator
Characteristics: - Low dropout voltage - High ripple rejection - Low output noise - Overcurrent protection - Thermal shutdown protection
Package: TO-252-3 (DPAK)
Essence: The NJM78LR05BD# is a voltage regulator IC that provides a stable output voltage for various electronic devices.
Packaging/Quantity: Available in tape and reel packaging, with 2,500 units per reel.
Specifications
- Input Voltage Range: 6.5V to 20V
- Output Voltage: 5V
- Output Current: Up to 1.5A
- Dropout Voltage: 0.5V (typical)
- Ripple Rejection: 70dB (typical)
- Quiescent Current: 4mA (typical)
- Operating Temperature Range: -40°C to +125°C
Detailed Pin Configuration
The NJM78LR05BD# has three pins:
- Input (VIN): Connects to the input voltage source.
- Ground (GND): Connected to the ground reference.
- Output (VOUT): Provides the regulated output voltage.
Functional Features
- Low Dropout Voltage: The NJM78LR05BD# exhibits a low dropout voltage, ensuring efficient regulation even when the input voltage is close to the desired output voltage.
- High Ripple Rejection: It effectively filters out high-frequency noise and ripple present in the input voltage, providing a clean and stable output.
- Low Output Noise: The IC minimizes output noise, making it suitable for noise-sensitive applications.
- Overcurrent Protection: The device incorporates overcurrent protection, safeguarding both the regulator and the connected circuitry from excessive current.
- Thermal Shutdown Protection: In case of excessive heat, the NJM78LR05BD# automatically shuts down to prevent damage due to overheating.
Advantages and Disadvantages
Advantages: - Stable output voltage regulation - Low dropout voltage for efficient operation - High ripple rejection for clean output - Overcurrent and thermal protection for enhanced reliability
Disadvantages: - Limited output current capacity (up to 1.5A) - Requires external capacitors for stability
Working Principles
The NJM78LR05BD# operates as a linear voltage regulator. It compares the output voltage with a reference voltage and adjusts the internal pass transistor to maintain a stable output voltage. The device utilizes feedback control to regulate the output voltage despite variations in the input voltage and load conditions.
Detailed Application Field Plans
The NJM78LR05BD# finds applications in various electronic devices that require a stable 5V power supply. Some common application fields include: - Microcontrollers and microprocessors - Digital logic circuits - Audio amplifiers - Sensor modules - Battery-powered devices
Detailed and Complete Alternative Models
- LM7805: A widely used alternative with similar specifications and pin configuration.
- MC7805: Another popular alternative with comparable performance characteristics.
- LT1084: A higher current alternative capable of delivering up to 5A of regulated output current.
These alternatives can be considered based on specific requirements and availability.
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Luettele 10 yleistä kysymystä ja vastausta, jotka liittyvät NJM78LR05BD# :n soveltamiseen teknisissä ratkaisuissa
Sure! Here are 10 common questions and answers related to the application of NJM78LR05BD# in technical solutions:
Q: What is NJM78LR05BD#? A: NJM78LR05BD# is a voltage regulator IC (Integrated Circuit) that provides a stable output voltage of 5V.
Q: What is the input voltage range for NJM78LR05BD#? A: The input voltage range for NJM78LR05BD# is typically between 7V and 35V.
Q: What is the maximum output current of NJM78LR05BD#? A: The maximum output current of NJM78LR05BD# is 0.5A (500mA).
Q: Can NJM78LR05BD# be used to power microcontrollers or Arduino boards? A: Yes, NJM78LR05BD# can be used to power microcontrollers or Arduino boards that require a stable 5V power supply.
Q: Is NJM78LR05BD# suitable for battery-powered applications? A: No, NJM78LR05BD# is not suitable for battery-powered applications as it requires an input voltage higher than typical battery voltages.
Q: Does NJM78LR05BD# have built-in protection features? A: Yes, NJM78LR05BD# has built-in protection features such as thermal shutdown and overcurrent protection.
Q: Can NJM78LR05BD# be used in automotive applications? A: Yes, NJM78LR05BD# can be used in automotive applications as long as the input voltage does not exceed its specified range.
Q: How do I connect the input and output capacitors to NJM78LR05BD#? A: The input capacitor should be connected between the VIN and GND pins, while the output capacitor should be connected between the VOUT and GND pins.
Q: Can NJM78LR05BD# be used in high-temperature environments? A: Yes, NJM78LR05BD# can operate in a wide temperature range of -40°C to +125°C, making it suitable for high-temperature environments.
Q: Are there any recommended PCB layout guidelines for using NJM78LR05BD#? A: Yes, it is recommended to keep the input and output traces short, place the input and output capacitors close to the IC, and provide adequate heat sinking for better thermal performance.
Please note that these answers are general and may vary depending on specific application requirements and datasheet specifications.