LT3081IDF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: High current, low dropout voltage, adjustable output voltage
• Package: DFN (Dual Flat No-Lead)
• Essence: Linear Technology's LT3081IDF is a high current adjustable voltage regulator designed for use in various applications.
• Packaging/Quantity: Available in tape and reel packaging, with 250 units per reel.

Specifications

• Input Voltage Range: 1.2V to 36V
• Output Voltage Range: 0.6V to 34.5V
• Maximum Output Current: 1.5A
• Dropout Voltage: 350mV
• Quiescent Current: 60μA
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LT3081IDF package consists of six pins:

1. VIN - Input voltage pin
2. GND - Ground pin
3. ADJ - Adjust pin for setting the output voltage
4. FB - Feedback pin for monitoring the output voltage
5. SET - Set pin for programming the current limit
6. VOUT - Output voltage pin

Functional Features

• High current capability allows it to handle demanding loads.
• Low dropout voltage ensures efficient regulation even with small input-output differentials.
• Adjustable output voltage provides flexibility in various applications.
• Built-in thermal shutdown and current limit protection enhance reliability and safety.
• Wide input voltage range enables compatibility with different power sources.

Advantages

• High current handling capacity makes it suitable for power-hungry devices.
• Low dropout voltage minimizes power dissipation and improves efficiency.
• Adjustable output voltage allows for customization based on specific requirements.
• Thermal shutdown and current limit protection enhance system reliability.

Disadvantages

• The DFN package may require careful handling during soldering due to its small size.
• Limited output current compared to some other voltage regulators in the market.

Working Principles

The LT3081IDF is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the feedback voltage (FB pin) with a reference voltage, and adjusts the pass transistor accordingly to maintain the desired output voltage. The adjustable output voltage is set using the ADJ pin, while the current limit can be programmed using the SET pin.

Application Field Plans

The LT3081IDF is suitable for a wide range of applications, including:

1. Power supplies for industrial equipment
2. Automotive electronics
3. Battery-powered devices
4. LED lighting systems
5. Audio amplifiers
6. Test and measurement instruments

Alternative Models

Here are some alternative models that offer similar functionality:

1. Texas Instruments LM317 - Adjustable Voltage Regulator
2. Analog Devices ADP3339 - Low Dropout Voltage Regulator
3. ON Semiconductor NCP1117 - High Current Linear Regulator
4. Maxim Integrated MAX603 - Precision Voltage Reference and Regulator

These alternatives can be considered based on specific requirements and availability.

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