SPX3940M3-L-2-5

Introduction

The SPX3940M3-L-2-5 is a voltage regulator belonging to the category of linear regulators. It is commonly used in electronic circuits to provide a stable and regulated output voltage from an unregulated input voltage source. This entry provides an overview of the product, including its basic information, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

Basic Information Overview

• Category: Linear Voltage Regulator
• Use: Provides stable and regulated output voltage
• Characteristics: Low dropout voltage, high accuracy, low quiescent current
• Package: SOT-223
• Essence: Regulates voltage for various electronic applications
• Packaging/Quantity: Typically available in reels or tubes with varying quantities

Specifications

• Input Voltage Range: 4.5V to 30V
• Output Voltage: 2.5V
• Output Current: Up to 1A
• Dropout Voltage: 0.5V at 1A
• Line Regulation: 0.05% typical
• Load Regulation: 0.1% typical
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The SPX3940M3-L-2-5 typically has three pins: 1. Input (VIN): Connects to the unregulated input voltage source 2. Ground (GND): Connected to the ground reference 3. Output (VOUT): Provides the regulated output voltage

Functional Features

• Stable Output: Provides a constant and stable output voltage despite variations in the input voltage or load conditions.
• Low Dropout: Operates with a low dropout voltage, ensuring efficient regulation even when the input voltage is close to the output voltage.
• Thermal Shutdown: Includes built-in thermal shutdown protection to prevent damage due to excessive heat.

Advantages and Disadvantages

Advantages

• High accuracy and low output voltage noise
• Wide input voltage range
• Thermal shutdown protection for added reliability

Disadvantages

• Higher power dissipation compared to switching regulators
• Limited maximum output current compared to some other regulators

Working Principles

The SPX3940M3-L-2-5 operates based on the principle of using a voltage reference and feedback control to maintain a constant output voltage. When the input voltage fluctuates, the internal circuitry adjusts the output to ensure a stable voltage level.

Detailed Application Field Plans

The SPX3940M3-L-2-5 is commonly used in various electronic applications, including: - Battery-powered devices - Portable electronics - Automotive systems - Industrial control systems

Detailed and Complete Alternative Models

Some alternative models to the SPX3940M3-L-2-5 include: - LM317: A widely used adjustable linear voltage regulator - L7805: Fixed 5V linear voltage regulator - LT1086: Adjustable low dropout voltage regulator

In conclusion, the SPX3940M3-L-2-5 is a reliable linear voltage regulator with specific characteristics and applications. Its stable output, low dropout voltage, and thermal protection make it suitable for a wide range of electronic designs.

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