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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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van L4940P85 in technische oplossingen

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.