LM2984CT/NOPB

Product Overview

• Category: Integrated Circuit
• Use: Voltage Regulator
• Characteristics: Low Dropout, Adjustable Output, Current Limiting
• Package: TO-220
• Essence: Linear Voltage Regulator
• Packaging/Quantity: Tube/50 units

Specifications

• Input Voltage Range: 2.5V to 7V
• Output Voltage Range: 1.25V to 5.5V
• Dropout Voltage: 0.5V (typical)
• Output Current: Up to 1A
• Quiescent Current: 75µA (typical)
• Line Regulation: 0.02%/V (typical)
• Load Regulation: 0.04%/A (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM2984CT/NOPB has a standard TO-220 package with 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: The LM2984CT/NOPB has a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• Adjustable Output: The output voltage can be adjusted using external resistors, providing flexibility in various applications.
• Current Limiting: The device incorporates current limiting protection, preventing excessive current flow and protecting the circuitry.
• Thermal Shutdown: In case of excessive temperature, the regulator shuts down to prevent damage.

Advantages and Disadvantages

Advantages: - Low dropout voltage enables efficient regulation. - Adjustable output voltage suits a wide range of applications. - Current limiting protects the circuitry from damage. - Thermal shutdown prevents overheating.

Disadvantages: - Limited output current capacity (up to 1A). - Requires external resistors for output voltage adjustment.

Working Principles

The LM2984CT/NOPB 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's resistance to maintain a stable output voltage. The device also incorporates feedback and control circuitry to provide accurate regulation and protection features.

Detailed Application Field Plans

The LM2984CT/NOPB finds applications in various fields, including:

1. Battery-Powered Devices: Provides regulated voltage for portable electronics, such as smartphones, tablets, and portable audio players.
2. Automotive Electronics: Used in automotive systems to regulate voltage for sensors, actuators, and other electronic components.
3. Industrial Control Systems: Provides stable voltage for control circuits in industrial automation and process control systems.
4. Telecommunications: Used in telecom equipment to regulate voltage for communication modules, routers, and switches.
5. Power Supplies: Suitable for low-power applications where a stable voltage source is required.

Detailed and Complete Alternative Models

Some alternative models to the LM2984CT/NOPB include:

1. LM1117: Low dropout voltage regulator with adjustable or fixed output voltage options.
2. LM317: Adjustable positive voltage regulator with a wide input voltage range.
3. LT1086: Low dropout positive voltage regulator with high output current capability.
4. LM7805: Fixed output voltage regulator with a maximum output current of 1A.
5. LM2940: Low dropout voltage regulator with adjustable or fixed output voltage options.

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

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