L4931ABDT35TR

Product Overview

• Category: Voltage Regulator
• Use: Provides a stable output voltage for electronic circuits
• Characteristics: Low dropout voltage, high accuracy, low quiescent current
• 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: 3.5V
• Output Current: Up to 100mA
• Dropout Voltage: 0.6V typical at 100mA
• Quiescent Current: 50µA typical
• Line Regulation: 0.2% typical
• Load Regulation: 0.4% typical
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L4931ABDT35TR has three pins:

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

Functional Features

• Low Dropout Voltage: The L4931ABDT35TR has a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• High Accuracy: This voltage regulator provides a highly accurate output voltage, ensuring stable operation of the connected electronic circuits.
• Low Quiescent Current: With a low quiescent current, the L4931ABDT35TR minimizes power consumption when in standby or idle mode.

Advantages and Disadvantages

Advantages: - Stable and accurate output voltage regulation - Low dropout voltage allows for efficient operation - Low quiescent current minimizes power consumption

Disadvantages: - Limited output current capability (up to 100mA) - SOT-223 package may require additional heat dissipation measures for high-power applications

Working Principles

The L4931ABDT35TR 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 stable output voltage.

Detailed Application Field Plans

The L4931ABDT35TR is commonly used in various electronic devices and circuits, including:

1. Battery-powered devices: Provides a stable voltage supply for microcontrollers, sensors, and other low-power components.
2. Communication systems: Ensures a reliable power source for RF modules, transceivers, and signal processing circuits.
3. Automotive electronics: Used in automotive control units, infotainment systems, and lighting applications.
4. Industrial automation: Provides regulated power for PLCs, motor control circuits, and sensor interfaces.

Detailed and Complete Alternative Models

1. LM1117-3.3: Similar voltage regulator with a TO-220 package and higher output current capability.
2. MCP1703-3.3: Low dropout voltage regulator with a SOT-23 package and adjustable output voltage.
3. LT1763-3.3: High-accuracy regulator with low dropout voltage and a wide input voltage range.

These alternative models offer similar functionality and can be considered as substitutes for the L4931ABDT35TR in different applications.

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