LT3080IST

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics:
  • High precision adjustable voltage regulator
  • Low dropout voltage
  • Wide input voltage range
  • Current limiting and thermal shutdown protection
• Package: TO-220
• Essence: Linear Technology's LT3080IST is a versatile voltage regulator designed for various applications requiring precise voltage regulation.
• Packaging/Quantity: The LT3080IST is available in a TO-220 package and is typically sold in reels of 1000 units.

Specifications

The LT3080IST has the following specifications:

• Input Voltage Range: 1.2V to 36V
• Output Voltage Range: 0.04V to 34.5V
• Dropout Voltage: 350mV at 1A load current
• Output Current: Up to 1.1A
• Line Regulation: 0.015% typical
• Load Regulation: 0.1% typical
• Quiescent Current: 1mA typical
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LT3080IST has five pins arranged as follows:

```

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| | --| VOUT |-- --| ADJ |-- --| VIN |-- --| GND |-- |_______| ```

• VIN: Input voltage pin
• ADJ: Adjust pin for setting the output voltage
• VOUT: Output voltage pin
• GND: Ground pin

Functional Features

The LT3080IST offers the following functional features:

1. High Precision: Provides precise voltage regulation with low output voltage deviation.
2. Low Dropout Voltage: Allows operation with a small voltage difference between the input and output.
3. Wide Input Voltage Range: Accepts a broad range of input voltages, making it suitable for various applications.
4. Current Limiting and Thermal Shutdown Protection: Protects the device from excessive current and temperature.

Advantages and Disadvantages

Advantages:

• High precision voltage regulation
• Low dropout voltage
• Wide input voltage range
• Current limiting and thermal shutdown protection

Disadvantages:

• Limited output current capacity (up to 1.1A)

Working Principles

The LT3080IST is a linear voltage regulator that uses a feedback mechanism to maintain a stable output voltage. It compares the output voltage with a reference voltage and adjusts the internal circuitry to achieve the desired output voltage. The device utilizes a pass transistor to regulate the voltage and dissipates excess energy as heat.

Detailed Application Field Plans

The LT3080IST can be used in various applications, including:

1. Power Supplies: Provides regulated voltage for electronic devices and circuits.
2. Battery Charging: Controls the charging voltage for batteries.
3. Audio Amplifiers: Stabilizes the voltage supply for audio amplification circuits.
4. LED Lighting: Ensures consistent voltage for LED lighting systems.
5. Industrial Control Systems: Regulates voltage in industrial control systems.

Detailed and Complete Alternative Models

Some alternative models to the LT3080IST include:

1. LM317T: A popular adjustable voltage regulator with similar characteristics.
2. LT1084CP-ADJ: Offers higher output current capability compared to LT3080IST.
3. LM1117-ADJ: Low dropout voltage regulator suitable for low-power applications.

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

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