LM2984T

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Low dropout voltage - High output current capability - Thermal shutdown protection - Short circuit protection - Adjustable output voltage - Wide input voltage range

Package: TO-220

Essence: The LM2984T is a voltage regulator IC that provides a stable output voltage by regulating the input voltage. It is commonly used in electronic devices to ensure a consistent power supply.

Packaging/Quantity: The LM2984T is typically sold in packs of 10 or more, and it comes in a TO-220 package.

Specifications

• Input Voltage Range: 4.5V to 40V
• Output Voltage Range: 1.25V to 37V
• Dropout Voltage: 0.5V (typical)
• Output Current: Up to 1A
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM2984T has a standard TO-220 package with three pins:

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

Functional Features

• Low Dropout Voltage: The LM2984T 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 Output Current Capability: With a maximum output current of 1A, the LM2984T can handle high-power applications.
• Thermal Shutdown Protection: The IC includes thermal shutdown protection, which prevents overheating and damage to the device.
• Short Circuit Protection: The LM2984T has built-in short circuit protection, safeguarding the circuit from damage in case of a short circuit.
• Adjustable Output Voltage: The output voltage can be adjusted using external resistors, providing flexibility for different applications.
• Wide Input Voltage Range: The LM2984T can accept input voltages ranging from 4.5V to 40V, making it suitable for various power sources.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient regulation. - High output current capability allows for powering demanding loads. - Thermal shutdown and short circuit protection enhance reliability. - Adjustable output voltage provides versatility. - Wide input voltage range accommodates different power sources.

Disadvantages: - Limited maximum output current compared to some other voltage regulators. - TO-220 package may require additional heat sinking for high-power applications.

Working Principles

The LM2984T operates as a linear voltage regulator. It uses a pass transistor to regulate the output voltage based on the difference between the reference voltage and the feedback voltage. By adjusting the resistance in the feedback network, the output voltage can be set to the desired level. The IC continuously monitors the output voltage and adjusts the pass transistor accordingly to maintain a stable output.

Detailed Application Field Plans

The LM2984T is commonly used in various electronic devices and applications, including: 1. Power supplies for microcontrollers and other digital circuits. 2. Battery-powered systems requiring stable voltage levels. 3. Automotive electronics, such as car audio systems and lighting controls. 4. Industrial control systems and automation equipment. 5. Portable electronic devices, such as smartphones and tablets.

Detailed and Complete Alternative Models

Some alternative models to the LM2984T include: - LM317: A popular adjustable voltage regulator with similar characteristics. - LM1117: Fixed voltage regulator available in various output voltage options. - LT1083: High-current adjustable voltage regulator with low dropout voltage. - LM7805: Fixed 5V voltage regulator commonly used in many applications.

These alternative models offer different features and specifications, allowing users to choose the most suitable option for their specific requirements.

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