KA317MTU

Product Overview

Category: Integrated Circuits (ICs)

Use: Voltage Regulator

Characteristics: - Adjustable Output Voltage - Low Dropout Voltage - Current Limiting - Thermal Shutdown Protection

Package: TO-220-3

Essence: The KA317MTU is a voltage regulator IC that provides a stable and adjustable output voltage for various electronic applications.

Packaging/Quantity: The KA317MTU is typically sold in reels or tubes, with a quantity of 1000 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V to 40V
• Output Voltage Range: 1.2V to 37V
• Output Current: Up to 1.5A
• Dropout Voltage: 1.5V (typical)
• Line Regulation: 0.01%/V
• Load Regulation: 0.1%
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The KA317MTU has three pins:

1. Input Pin (VIN): This pin is connected to the input voltage source.
2. Output Pin (VOUT): This pin provides the regulated output voltage.
3. Adjust Pin (ADJ): This pin is used to adjust the output voltage by connecting an external resistor network.

Functional Features

• Adjustable Output Voltage: The KA317MTU allows the user to adjust the output voltage according to their specific requirements.
• Low Dropout Voltage: The low dropout voltage ensures efficient regulation even when the input voltage is close to the desired output voltage.
• Current Limiting: The IC incorporates current limiting protection to prevent damage to the device and the connected circuitry in case of excessive load current.
• Thermal Shutdown Protection: The KA317MTU includes a thermal shutdown feature that shuts down the device if the temperature exceeds a safe operating limit, preventing overheating and potential damage.

Advantages and Disadvantages

Advantages: - Wide input voltage range - Adjustable output voltage - Low dropout voltage - Current limiting protection - Thermal shutdown protection

Disadvantages: - Limited output current capacity (up to 1.5A) - Requires external resistor network for voltage adjustment

Working Principles

The KA317MTU is based on a linear voltage regulator architecture. It utilizes a reference voltage, feedback mechanism, and pass transistor to regulate the output voltage. The adjustable output voltage is achieved by connecting an external resistor network to the ADJ pin, which sets the desired voltage level.

Detailed Application Field Plans

The KA317MTU finds applications in various electronic systems where a stable and adjustable voltage supply is required. Some common application areas include:

1. Power Supply Units (PSUs)
2. Battery Charging Circuits
3. Audio Amplifiers
4. LED Lighting Systems
5. Industrial Control Systems

Detailed and Complete Alternative Models

1. LM317T: This is a popular alternative to the KA317MTU, offering similar features and specifications.
2. LT1086: Another alternative with higher output current capability and lower dropout voltage.
3. LM1117: A low dropout voltage regulator with fixed output voltage options.

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

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