L4931ABD50-TR

Product Overview

Category: Voltage Regulator
Use: Power management
Characteristics: Low dropout, low quiescent current, high accuracy
Package: SOT-223
Essence: Linear voltage regulator
Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.4V to 20V
• Output Voltage: 5V
• Dropout Voltage: 0.6V at 150mA
• Quiescent Current: 5mA
• Line Regulation: 0.2% typical
• Load Regulation: 0.4% typical
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L4931ABD50-TR has three pins:

1. Input (IN): This pin is connected to the input voltage source.
2. Ground (GND): This pin is connected to the ground reference.
3. Output (OUT): This pin provides the regulated output voltage.

Functional Features

• Low dropout voltage: The L4931ABD50-TR has a low dropout voltage of 0.6V at 150mA, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• Low quiescent current: With a quiescent current of only 5mA, this voltage regulator minimizes power consumption when in standby or idle mode.
• High accuracy: The L4931ABD50-TR offers high output voltage accuracy, ensuring stable and precise voltage regulation.
• Thermal shutdown protection: It includes built-in thermal shutdown protection to prevent damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - Low dropout voltage enables efficient regulation even with low input-output voltage differentials. - Low quiescent current reduces power consumption and extends battery life. - High accuracy ensures stable and reliable voltage regulation.

Disadvantages: - Limited output current capability (150mA) may not be suitable for high-power applications. - SOT-223 package may require additional heat sinking for better thermal management in certain scenarios.

Working Principles

The L4931ABD50-TR is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with a fraction of the output voltage, adjusting the pass transistor to maintain a constant output voltage despite variations in the input voltage or load conditions.

Detailed Application Field Plans

The L4931ABD50-TR is commonly used in various electronic devices and systems, including but not limited to:

1. Battery-powered devices: It provides stable voltage regulation for portable electronics such as smartphones, tablets, and digital cameras.
2. Automotive applications: It ensures reliable power management in automotive systems, including infotainment systems, lighting controls, and sensors.
3. Industrial equipment: It is suitable for powering microcontrollers, sensors, and other components in industrial automation systems.
4. Communication systems: It can be used in routers, modems, and other networking equipment to maintain a stable power supply.

Detailed and Complete Alternative Models

1. LM1117-5.0: This voltage regulator offers similar specifications and pin configuration to the L4931ABD50-TR.
2. MCP1700-500: Another alternative with comparable characteristics and package type.
3. TS2950CT-5.0: This voltage regulator provides a dropout voltage of 0.5V at 100mA and comes in a TO-220 package.

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

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