L4931ABDT25TR

Product Overview

• Category: Voltage Regulator
• Use: Provides a stable output voltage for electronic circuits
• Characteristics: Low dropout voltage, 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: 2.5V
• Dropout Voltage: 0.6V at 150mA
• Quiescent Current: 75µA
• Line Regulation: 0.04%/V
• Load Regulation: 0.1%
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L4931ABDT25TR has three pins:

1. Vin (Pin 1): Input voltage pin
2. Vout (Pin 2): Output voltage pin
3. GND (Pin 3): Ground pin

Functional Features

• Low dropout voltage ensures efficient regulation even with small input-output differentials.
• Low quiescent current minimizes power consumption in standby mode.
• High accuracy provides precise output voltage regulation.
• Thermal shutdown protection prevents damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - Low dropout voltage allows for efficient operation in low voltage applications. - Low quiescent current extends battery life in portable devices. - High accuracy ensures reliable performance in sensitive circuits.

Disadvantages: - Limited output current capability may not be suitable for high-power applications. - SOT-223 package may require additional heat dissipation measures in certain scenarios.

Working Principles

The L4931ABDT25TR is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the output voltage to a reference voltage and adjusting the pass transistor accordingly. When the input voltage is higher than the desired output voltage, the pass transistor is partially turned on, allowing current to flow through it. This reduces the voltage across the pass transistor, resulting in a regulated output voltage.

Detailed Application Field Plans

The L4931ABDT25TR is commonly used in various electronic devices and applications, including:

1. Battery-powered devices: Provides stable voltage for microcontrollers, sensors, and other low-power components.
2. Automotive electronics: Ensures reliable voltage supply for automotive control systems and infotainment devices.
3. Industrial equipment: Regulates voltage for sensors, actuators, and control circuits in industrial automation systems.
4. Communication systems: Maintains stable voltage for RF modules, transceivers, and signal processing circuits.

Detailed and Complete Alternative Models

1. LM1117-2.5: Similar voltage regulator with adjustable output voltage.
2. LT1763-2.5: Low dropout voltage regulator with higher output current capability.
3. MCP1702-2.5: Cost-effective voltage regulator with low quiescent current.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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