L4931CD25

Product Overview

• Category: Voltage Regulator
• Use: To regulate and stabilize voltage in electronic circuits
• Characteristics: Low dropout, high accuracy, low quiescent current
• Package: TO-252 (DPAK)
• Essence: Linear voltage regulator
• Packaging/Quantity: Tape and reel, 2,500 units per reel

Specifications

• Input Voltage Range: 4.4V to 26V
• Output Voltage: 2.5V
• Output Current: Up to 250mA
• Dropout Voltage: 0.6V typical at 250mA
• Quiescent Current: 100µA typical
• Line Regulation: 0.05% typical
• Load Regulation: 0.1% typical
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L4931CD25 has three pins:

1. Input (VIN): Connects to the input voltage source.
2. Ground (GND): Connected to the ground reference of the circuit.
3. Output (VOUT): Provides the regulated output voltage.

Functional Features

• Low Dropout: The L4931CD25 can operate with a very small voltage difference between the input and output, ensuring efficient power conversion.
• High Accuracy: It provides a precise and stable output voltage, minimizing voltage fluctuations.
• Low Quiescent Current: The regulator consumes minimal current when there is no load, reducing power consumption.
• Short Circuit Protection: The device is designed to withstand short circuits without damage.
• Thermal Shutdown: It incorporates thermal protection to prevent overheating.

Advantages and Disadvantages

Advantages: - High accuracy and stability - Low dropout voltage - Low quiescent current - Short circuit protection - Thermal shutdown

Disadvantages: - Limited output current capacity (up to 250mA) - Restricted input voltage range (4.4V to 26V)

Working Principles

The L4931CD25 is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with the feedback voltage, adjusting the pass transistor to maintain a constant output voltage. The dropout voltage is minimized by using a low dropout (LDO) design.

Detailed Application Field Plans

The L4931CD25 is commonly used in various electronic applications, including:

1. Battery-Powered Devices: It provides a stable voltage supply for portable devices such as smartphones, tablets, and portable audio players.
2. Embedded Systems: Used in microcontroller-based systems to ensure a reliable power source for the microcontroller and other components.
3. Automotive Electronics: Provides regulated voltage for automotive applications, including infotainment systems, lighting controls, and sensors.
4. Industrial Control Systems: Used in industrial automation and control systems to regulate voltage for sensors, actuators, and communication modules.

Detailed and Complete Alternative Models

Some alternative models to the L4931CD25 include:

1. LM1117-2.5: A popular voltage regulator with similar specifications and package options.
2. LT1763-2.5: Offers lower dropout voltage and higher output current capability.
3. MCP1702-2.5: Provides a cost-effective solution with comparable performance.

These alternatives can be considered based on specific application requirements and availability.

Word count: 400 words