LM317LD13TR

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

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

Package: TO-252 (DPAK)

Essence: The LM317LD13TR is a voltage regulator IC that provides a regulated output voltage. It is commonly used in various electronic devices to ensure a stable and reliable power supply.

Packaging/Quantity: The LM317LD13TR is typically available in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

The LM317LD13TR has the following specifications:

• Input Voltage Range: 4.2V to 40V
• Output Voltage Range: 1.25V to 37V
• Output Current: Up to 1.5A
• Dropout Voltage: 1.2V (typical)
• Line Regulation: 0.01%/V (typical)
• Load Regulation: 0.1% (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM317LD13TR has three pins:

1. Adjust: This pin is used to set the desired output voltage by connecting an external resistor network.
2. Output: The regulated output voltage is provided through this pin.
3. Input: The input voltage is applied to this pin.

Functional Features

• Adjustable Output Voltage: The LM317LD13TR allows the user to adjust the output voltage according to their specific requirements.
• High Current Capability: With a maximum output current of 1.5A, this voltage regulator can handle a wide range of load conditions.
• Low Dropout Voltage: The low dropout voltage ensures that the output voltage remains stable even when the input voltage is close to the desired output voltage.
• Thermal Overload Protection: The LM317LD13TR incorporates thermal overload protection, which prevents the IC from overheating and ensures its safe operation.
• Short Circuit Protection: In case of a short circuit, the LM317LD13TR automatically limits the output current to protect itself and the connected components.

Advantages and Disadvantages

Advantages: - Adjustable output voltage allows for flexibility in various applications. - High current capability enables it to power demanding loads. - Thermal overload and short circuit protection enhance reliability and safety.

Disadvantages: - Dropout voltage may cause some power loss in low input voltage scenarios. - Requires external resistors for voltage adjustment, adding complexity to the circuit design.

Working Principles

The LM317LD13TR is a linear voltage regulator based on the adjustable positive voltage regulator architecture. It uses a reference voltage and an error amplifier to compare the output voltage with the desired voltage set by the user. The error amplifier adjusts the pass transistor's resistance to maintain a constant output voltage despite changes in load conditions or input voltage.

Detailed Application Field Plans

The LM317LD13TR finds applications in various fields, including:

1. Power Supply Design: It can be used to regulate the output voltage in power supply circuits, ensuring a stable and reliable power source for electronic devices.
2. Battery Charging Systems: The LM317LD13TR can be employed in battery charging systems to provide a regulated voltage for charging batteries efficiently and safely.
3. Audio Amplifiers: It can be utilized in audio amplifier circuits to regulate the supply voltage, preventing distortion and ensuring consistent audio quality.
4. LED Lighting: The LM317LD13TR can be integrated into LED lighting systems to control the voltage supplied to the LEDs, extending their lifespan and maintaining brightness.

Detailed and Complete Alternative Models

Some alternative models to the LM317LD13TR include:

1. LM1117-ADJ
2. LM7805
3. LT1084CP-ADJ
4. LM350T

These models offer similar voltage regulation capabilities and can be used as alternatives depending on specific requirements and availability.

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