LF25CDT

Product Overview

• Category: Electronic Component
• Use: Voltage Regulator
• Characteristics: Compact, High Efficiency, Low Power Consumption
• Package: TO-220
• Essence: Linear Voltage Regulator
• Packaging/Quantity: Tape and Reel, 1000 units per reel

Specifications

• Input Voltage Range: 4.5V to 25V
• Output Voltage Range: 1.25V to 20V
• Output Current: Up to 1A
• Dropout Voltage: 0.5V (typical)
• Line Regulation: ±0.2% (typical)
• Load Regulation: ±0.4% (typical)
• Quiescent Current: 5mA (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LF25CDT has three pins:

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

Functional Features

• Voltage Regulation: The LF25CDT maintains a stable output voltage regardless of variations in input voltage or load conditions.
• Low Dropout Voltage: With a dropout voltage as low as 0.5V, the regulator can operate efficiently even when the input voltage is close to the desired output voltage.
• Short Circuit Protection: The device includes built-in protection against short circuits, preventing damage to the regulator and connected components.
• Thermal Shutdown: In case of excessive temperature, the LF25CDT automatically shuts down to prevent overheating and potential damage.

Advantages and Disadvantages

Advantages: - Compact size allows for easy integration into various electronic devices. - High efficiency results in minimal power loss during voltage regulation. - Low power consumption helps prolong battery life in portable applications.

Disadvantages: - Limited output current capability (up to 1A), which may not be sufficient for high-power applications. - Dropout voltage of 0.5V may restrict the usable input voltage range in certain scenarios.

Working Principles

The LF25CDT is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the output voltage with a reference voltage and adjusting the pass transistor accordingly. When the output voltage deviates from the desired value, the regulator adjusts the pass transistor to maintain a stable output voltage.

Detailed Application Field Plans

The LF25CDT is commonly used in various electronic devices and applications, including but not limited to:

1. Consumer Electronics: Powering audio/video equipment, gaming consoles, and small appliances.
2. Automotive: Regulating voltage for automotive electronics, such as infotainment systems and lighting controls.
3. Industrial Equipment: Providing stable voltage for control systems, sensors, and motor drives.
4. Telecommunications: Voltage regulation in networking equipment, routers, and modems.
5. Medical Devices: Powering medical instruments, patient monitoring systems, and diagnostic equipment.

Detailed and Complete Alternative Models

1. LM317: A popular adjustable linear voltage regulator with similar characteristics and pin configuration.
2. LT1084: Fixed output voltage linear regulator with higher output current capability.
3. LM7805: Fixed 5V linear voltage regulator commonly used in low-power applications.

These alternative models offer different specifications and features, providing flexibility based on specific application requirements.

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