L4931CPT120

Product Overview

• Category: Voltage Regulator
• Use: To regulate and stabilize voltage in electronic circuits
• Characteristics: Low dropout, low quiescent current, high accuracy
• Package: TO-220, SOT-223
• Essence: Linear voltage regulator
• Packaging/Quantity: Tape and reel, 2,500 units per reel

Specifications

• Input Voltage Range: 4.4V to 20V
• Output Voltage: 1.2V
• Output Current: 250mA
• Dropout Voltage: 0.6V at 100mA
• Quiescent Current: 5mA
• Line Regulation: 0.04%/V
• Load Regulation: 0.1%/mA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L4931CPT120 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 L4931CPT120 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 minimal current when there is no load, reducing 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 operation.

Disadvantages: - Limited output current capability (250mA). - Restricted input voltage range (4.4V to 20V).

Working Principles

The L4931CPT120 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 transistor.

Detailed Application Field Plans

The L4931CPT120 is commonly used in various electronic devices, including:

1. Battery-Powered Devices: Portable electronics such as smartphones, tablets, and portable media players benefit from the low dropout voltage and low quiescent current of the L4931CPT120.
2. Industrial Control Systems: The voltage regulator ensures stable power supply in industrial control systems, preventing voltage fluctuations from affecting sensitive components.
3. Automotive Electronics: The L4931CPT120 is suitable for automotive applications where a stable voltage supply is crucial for the proper functioning of various electronic systems.

Detailed and Complete Alternative Models

1. LM1117: Similar to the L4931CPT120, the LM1117 is a low dropout voltage regulator with adjustable or fixed output voltage options.
2. LT1763: This voltage regulator offers a higher output current capability and lower dropout voltage compared to the L4931CPT120.
3. TS2950: The TS2950 is another low dropout voltage regulator with a wide input voltage range and adjustable or fixed output voltage options.

These alternative models provide similar functionality to the L4931CPT120 but may have different specifications and package options.

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