LD1085V

Product Overview

• Category: Voltage Regulator
• Use: LD1085V is a low-dropout voltage regulator designed to provide a regulated output voltage even when the input voltage is close to the desired output voltage.
• Characteristics: LD1085V has a low dropout voltage, high output current capability, and excellent line and load regulation. It is suitable for various applications where a stable and reliable power supply is required.
• Package: LD1085V is available in a TO-220 package, which provides good thermal conductivity and easy mounting on a heat sink.
• Essence: The essence of LD1085V lies in its ability to regulate the output voltage efficiently and reliably, ensuring a stable power supply for electronic devices.
• Packaging/Quantity: LD1085V is typically sold in reels or tubes, with quantities varying depending on the supplier.

Specifications

• Input Voltage Range: 4.2V to 26V
• Output Voltage Range: 1.25V to 20V
• Dropout Voltage: 1.3V (typical)
• Output Current: Up to 3A
• Line Regulation: 0.04% (typical)
• Load Regulation: 0.1% (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

LD1085V has three pins:

1. Input Pin (VIN): This pin is used to connect the input voltage source.
2. Output Pin (VOUT): This pin provides the regulated output voltage.
3. Ground Pin (GND): This pin is connected to the ground reference.

Functional Features

• Low dropout voltage ensures efficient regulation even with small input-output voltage differentials.
• High output current capability allows LD1085V to power a wide range of electronic devices.
• Excellent line and load regulation provide a stable output voltage under varying input and load conditions.
• Built-in thermal shutdown protection prevents the device from overheating.

Advantages and Disadvantages

Advantages: - Low dropout voltage enables efficient regulation. - High output current capability suits various applications. - Excellent line and load regulation ensure a stable output voltage. - Thermal shutdown protection enhances device reliability.

Disadvantages: - Limited input voltage range (4.2V to 26V). - Dropout voltage may cause power dissipation in certain scenarios.

Working Principles

LD1085V utilizes a series pass transistor to regulate the output voltage. When the input voltage is higher than the desired output voltage, the series pass transistor acts as a variable resistor, dropping the excess voltage across it. This ensures that the output voltage remains constant even when the input voltage fluctuates.

Detailed Application Field Plans

LD1085V finds applications in various fields, including but not limited to: 1. Power supplies for microcontrollers and other digital ICs. 2. Battery-powered devices requiring stable voltage levels. 3. Automotive electronics, such as car audio systems and navigation devices. 4. Industrial control systems and automation equipment. 5. Communication devices, including routers and modems.

Detailed and Complete Alternative Models

Some alternative models to LD1085V include: - LM317: A popular adjustable voltage regulator with similar characteristics. - LT1085: A high-current, low-dropout voltage regulator suitable for demanding applications. - TPS7A47: An ultra-low-noise, high-PSRR voltage regulator for sensitive analog circuits.

These alternatives offer different features and specifications, allowing users to choose the most suitable option based on their specific requirements.

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