LD1085DT18R

Product Overview

• Category: Voltage Regulator
• Use: To regulate and stabilize voltage in electronic circuits
• Characteristics:
  • High precision and low dropout voltage
  • Wide input voltage range
  • Adjustable output voltage
  • Overcurrent and thermal protection
• Package: TO-220 package
• Essence: A voltage regulator designed for various applications
• Packaging/Quantity: Available in reels or tubes, quantity depends on supplier

Specifications

• Input Voltage Range: 4.75V to 20V
• Output Voltage Range: 1.25V to 18V
• Output Current: Up to 3A
• Dropout Voltage: 1.15V (typical)
• Line Regulation: ±0.2% (typical)
• Load Regulation: ±0.4% (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LD1085DT18R has 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

• High Precision: The LD1085DT18R offers high precision voltage regulation, ensuring stable and accurate output.
• Low Dropout Voltage: With a low dropout voltage, it can maintain regulation even when the input voltage is close to the desired output voltage.
• Wide Input Voltage Range: It can accept a wide range of input voltages, making it suitable for various applications.
• Adjustable Output Voltage: The output voltage can be adjusted within the specified range using external resistors.
• Overcurrent and Thermal Protection: The regulator incorporates protection features to prevent damage from excessive current or temperature.

Advantages and Disadvantages

Advantages: - High precision voltage regulation - Wide input voltage range - Adjustable output voltage - Overcurrent and thermal protection

Disadvantages: - Dropout voltage may limit its use in low voltage applications - Requires external components for adjustment and filtering

Working Principles

The LD1085DT18R is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a stable output. The dropout voltage is the minimum voltage difference required between the input and output for proper regulation.

Detailed Application Field Plans

The LD1085DT18R can be used in various applications, including: 1. Power supplies for microcontrollers and digital circuits 2. Battery charging circuits 3. Automotive electronics 4. Industrial control systems 5. Audio amplifiers

Detailed and Complete Alternative Models

1. LM317T: A popular adjustable voltage regulator with similar specifications.
2. LT1085CT: Offers higher output current capability while maintaining low dropout voltage.
3. LM1117-ADJ: Low dropout voltage regulator with adjustable output voltage.

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

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