LD1085D2T18R

Product Overview

Category

LD1085D2T18R belongs to the category of voltage regulators.

Use

It is commonly used to regulate and stabilize voltage in electronic circuits.

Characteristics

• LD1085D2T18R is a low-dropout linear voltage regulator.
• It has a fixed output voltage of 1.8V.
• The device operates with a maximum input voltage of 30V.
• LD1085D2T18R can provide a maximum output current of 3A.

Package

The LD1085D2T18R comes in a TO-220 package, which is a widely used through-hole package for power devices.

Essence

The essence of LD1085D2T18R lies in its ability to maintain a stable output voltage despite fluctuations in the input voltage.

Packaging/Quantity

LD1085D2T18R is typically sold in reels or tubes, containing a specific quantity of units per package. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Input Voltage Range: Up to 30V
• Output Voltage: 1.8V (fixed)
• Output Current: Up to 3A
• Dropout Voltage: 1.5V (typical)
• Line Regulation: ±0.2% (typical)
• Load Regulation: ±0.4% (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LD1085D2T18R has three pins:

1. Vin (Pin 1): Input voltage pin.
2. Vout (Pin 2): Output voltage pin.
3. GND (Pin 3): Ground pin.

Functional Features

• Low dropout voltage: LD1085D2T18R can operate with a low input-output voltage differential, minimizing power dissipation.
• Overcurrent and thermal protection: The device includes built-in protection mechanisms to prevent damage due to excessive current or temperature.
• Fast transient response: LD1085D2T18R can quickly respond to changes in load conditions, maintaining a stable output voltage.

Advantages and Disadvantages

Advantages

• High output current capability.
• Low dropout voltage.
• Wide operating temperature range.
• Built-in protection features.

Disadvantages

• Fixed output voltage may limit its versatility in certain applications.
• Requires external components for proper operation.

Working Principles

LD1085D2T18R operates based on the principle of linear regulation. It uses a pass transistor to regulate the output voltage by adjusting the resistance between the input and output terminals. By maintaining a constant voltage drop across the pass transistor, LD1085D2T18R ensures a stable output voltage.

Detailed Application Field Plans

LD1085D2T18R finds applications in various electronic systems that require a regulated 1.8V power supply. Some common application fields include:

1. Microcontroller circuits
2. Digital logic circuits
3. Audio amplifiers
4. Battery-powered devices
5. Industrial control systems

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to LD1085D2T18R are:

1. LM1117-1.8: A popular low-dropout linear regulator with a fixed 1.8V output voltage.
2. LT1085CT-1.8: Another high-current linear regulator with a fixed 1.8V output voltage.
3. TPS7A1801-SP: A radiation-hardened linear regulator suitable for space applications, offering a fixed 1.8V output voltage.

These alternative models can be considered depending on specific requirements and availability.

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