LT1039CN/R

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Low dropout voltage - High output current capability - Adjustable output voltage - Thermal shutdown protection - Short-circuit current limiting

Package: TO-220

Essence: LT1039CN/R is a voltage regulator IC designed to provide a stable and regulated output voltage for various electronic applications.

Packaging/Quantity: The LT1039CN/R is available in a TO-220 package. Each package contains one unit of the IC.

Specifications

• Input Voltage Range: 4.5V to 20V
• Output Voltage Range: 1.2V to 18V
• Dropout Voltage: 0.6V at 1A
• Output Current: Up to 1.5A
• Quiescent Current: 10mA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LT1039CN/R has the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. ADJ: Adjust pin for setting the output voltage
4. VOUT: Output voltage pin

Functional Features

• Low Dropout Voltage: The LT1039CN/R exhibits a low dropout voltage, ensuring efficient regulation even when the input voltage is close to the desired output voltage.
• High Output Current Capability: With a maximum output current of 1.5A, this voltage regulator can handle demanding loads.
• Adjustable Output Voltage: The ADJ pin allows users to set the desired output voltage within the specified range.
• Thermal Shutdown Protection: The IC incorporates thermal shutdown protection, which prevents overheating and potential damage to the device.
• Short-Circuit Current Limiting: The LT1039CN/R features short-circuit current limiting, safeguarding the circuit from excessive current during a short-circuit condition.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient regulation - High output current capability for demanding loads - Adjustable output voltage provides flexibility - Thermal shutdown protection prevents overheating - Short-circuit current limiting protects the circuit

Disadvantages: - Limited input voltage range (4.5V to 20V) - Quiescent current of 10mA may be relatively high for low-power applications

Working Principles

The LT1039CN/R operates as a linear voltage regulator. It uses a pass transistor to regulate the output voltage based on the feedback received from the adjust pin. When the input voltage exceeds the desired output voltage, the pass transistor adjusts its resistance to maintain a stable output voltage. The thermal shutdown protection and short-circuit current limiting mechanisms ensure the safety and reliability of the device.

Detailed Application Field Plans

The LT1039CN/R is suitable for various applications that require a regulated voltage supply. Some potential application fields include: - Power supplies for microcontrollers and digital circuits - Battery-powered devices - Automotive electronics - Industrial control systems - Audio amplifiers

Detailed and Complete Alternative Models

1. LM317: A popular adjustable voltage regulator with similar characteristics and package options.
2. LM7805: A fixed 5V voltage regulator commonly used in electronic circuits.
3. LT1084: A high-current adjustable voltage regulator with enhanced thermal performance.

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

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