KA7905ATU

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: Negative voltage regulator, fixed output voltage of -5V
• Package: TO-220
• Essence: Regulates input voltage to a stable -5V output voltage
• Packaging/Quantity: Typically sold in reels or tubes containing multiple units

Specifications

• Input Voltage Range: -7V to -25V
• Output Voltage: -5V
• Output Current: Up to 1A
• Dropout Voltage: 2V (maximum)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The KA7905ATU has three pins: 1. Input Pin (Pin 1): Connects to the input voltage source (-7V to -25V). 2. Ground Pin (Pin 2): Connected to the ground reference. 3. Output Pin (Pin 3): Provides the regulated -5V output.

Functional Features

• Voltage Regulation: The KA7905ATU ensures a stable -5V output voltage regardless of input voltage fluctuations.
• Overcurrent Protection: The IC incorporates overcurrent protection to safeguard connected devices.
• Thermal Shutdown: In case of excessive heat, the IC shuts down to prevent damage.

Advantages and Disadvantages

Advantages: - Simple to use and integrate into electronic circuits. - Provides a reliable and stable -5V output voltage. - Offers overcurrent protection and thermal shutdown features.

Disadvantages: - Fixed output voltage may not be suitable for all applications. - Dropout voltage of 2V may limit its use in low voltage scenarios.

Working Principles

The KA7905ATU is a negative voltage regulator that utilizes a series pass transistor to regulate the output voltage. It compares the output voltage with a reference voltage and adjusts the series pass transistor accordingly to maintain a stable -5V output.

Detailed Application Field Plans

The KA7905ATU is commonly used in various electronic applications, including: 1. Power Supplies: It can be employed as a voltage regulator in power supply circuits to provide a stable -5V rail. 2. Audio Amplifiers: The IC can be utilized to generate a negative voltage supply for audio amplifier circuits. 3. Industrial Control Systems: It finds application in industrial control systems where a regulated negative voltage is required.

Detailed and Complete Alternative Models

• LM7905: Negative voltage regulator with similar specifications and pin configuration.
• MC7905: Another alternative with comparable characteristics and functionality.
• L7905CV: Negative voltage regulator in TO-220 package, offering -5V output.

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