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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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací L4940P85 v technických řešeních

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.