L4931ABD120

Product Overview

• Category: Voltage Regulator
• Use: To regulate and stabilize voltage in electronic circuits
• Characteristics: Low dropout, low quiescent current, high accuracy
• Package: TO-252 (DPAK)
• Essence: Linear voltage regulator
• Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.4V to 26V
• Output Voltage: 1.2V
• Output Current: Up to 100mA
• Dropout Voltage: 0.6V typical at 100mA
• Quiescent Current: 5mA typical
• Line Regulation: 0.04%/V typical
• Load Regulation: 0.1% typical
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L4931ABD120 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 L4931ABD120 has a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• Low Quiescent Current: The device consumes very little current when in standby mode, minimizing power consumption.
• High Accuracy: The voltage regulator provides a highly accurate output voltage, ensuring stable operation of the connected circuitry.

Advantages and Disadvantages

Advantages: - Low dropout voltage enables efficient regulation. - Low quiescent current reduces power consumption. - High accuracy ensures stable circuit operation.

Disadvantages: - Limited output current capacity (up to 100mA). - Not suitable for applications requiring higher output voltages.

Working Principles

The L4931ABD120 is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It compares the reference voltage with the feedback voltage and adjusts the pass transistor accordingly to maintain a constant output voltage. The dropout voltage is minimized by using a low resistance pass element.

Detailed Application Field Plans

The L4931ABD120 is commonly used in various electronic devices and circuits, including but not limited to:

1. Battery-powered devices: Portable electronics, such as smartphones, tablets, and portable audio players.
2. Automotive applications: Voltage regulation in automotive electronics, such as infotainment systems and dashboard displays.
3. Industrial control systems: Power supply stabilization in industrial automation equipment and control systems.
4. Communication systems: Voltage regulation in networking equipment, routers, and modems.

Detailed and Complete Alternative Models

1. LM1117-3.3: A similar voltage regulator with an output voltage of 3.3V.
2. LT1763: A high-precision voltage regulator with adjustable output voltage.
3. TS2950: A low-power voltage regulator with a maximum output current of 150mA.

These alternative models offer different output voltages, current capacities, and additional features to suit specific application requirements.

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