L4940P85
Product Overview
- Category: Voltage Regulator
- Use: To regulate and stabilize voltage in electronic circuits
- Characteristics: High precision, low dropout voltage, high current capability
- Package: TO-220
- Essence: Linear voltage regulator
- Packaging/Quantity: Available in reels of 2,500 units
Specifications
- Input Voltage: Up to 35V
- Output Voltage: 8.5V
- Output Current: Up to 1.5A
- Dropout Voltage: 1.2V (typical)
- Line Regulation: 0.04% (typical)
- Load Regulation: 0.3% (typical)
- Operating Temperature Range: -40°C to +125°C
Detailed Pin Configuration
The L4940P85 voltage regulator has the following pin configuration:
- Input (VIN): Connects to the input voltage source.
- Ground (GND): Common ground reference for the circuit.
- Output (VOUT): Provides the regulated output voltage.
Functional Features
- High precision regulation: The L4940P85 ensures a stable output voltage even with variations in input voltage and load conditions.
- Low dropout voltage: The regulator can operate with a small voltage difference between the input and output, minimizing power dissipation.
- High current capability: Capable of delivering up to 1.5A of continuous output current.
- Thermal shutdown protection: Built-in protection mechanism that shuts down the regulator in case of excessive temperature.
Advantages and Disadvantages
Advantages: - Precise voltage regulation - Low dropout voltage - High current capability - Thermal shutdown protection
Disadvantages: - Limited output voltage options - Requires external capacitors for stability
Working Principles
The L4940P85 is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a stable output voltage. The dropout voltage is minimized by using a low resistance pass transistor.
Detailed Application Field Plans
The L4940P85 is commonly used in various electronic applications, including: - Power supplies for microcontrollers and other digital ICs - Battery-powered devices requiring stable voltage levels - Automotive electronics - Industrial control systems
Detailed and Complete Alternative Models
Some alternative models to the L4940P85 voltage regulator include: - LM7808: A popular 8V linear voltage regulator with similar specifications. - LT1085: A high-current, adjustable linear voltage regulator capable of delivering up to 3A of output current. - LM317: A versatile adjustable linear voltage regulator with a wide input voltage range.
These alternative models offer different features and specifications, allowing designers to choose the most suitable option for their specific application.
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기술 솔루션에 L4940P85 적용과 관련된 10가지 일반적인 질문과 답변을 나열하세요.
Sure! Here are 10 common questions and answers related to the application of L4940P85 in technical solutions:
Q: What is L4940P85? A: L4940P85 is a voltage regulator IC that provides a fixed output voltage of 8.5V.
Q: What is the maximum input voltage for L4940P85? A: The maximum input voltage for L4940P85 is 35V.
Q: What is the maximum output current of L4940P85? A: The maximum output current of L4940P85 is 1.5A.
Q: Can L4940P85 be used in automotive applications? A: Yes, L4940P85 can be used in automotive applications as it has a wide operating temperature range and is designed to withstand harsh environments.
Q: Is L4940P85 suitable for battery-powered applications? A: Yes, L4940P85 is suitable for battery-powered applications as it has low dropout voltage and low quiescent current.
Q: Does L4940P85 require any external components for operation? A: Yes, L4940P85 requires an input capacitor and an output capacitor for stable operation.
Q: Can L4940P85 handle short-circuit conditions? A: Yes, L4940P85 has built-in protection features like thermal shutdown and current limiting to handle short-circuit conditions.
Q: What is the typical dropout voltage of L4940P85? A: The typical dropout voltage of L4940P85 is around 1.2V at full load.
Q: Can L4940P85 be used in high-frequency applications? A: Yes, L4940P85 can be used in high-frequency applications as it has a fast transient response and good stability.
Q: Is L4940P85 available in different package options? A: Yes, L4940P85 is available in different package options like TO-220 and DPAK for easy integration into various designs.
Please note that these answers are general and may vary depending on the specific application and requirements.