L4971 Voltage Regulator

Product Overview

The L4971 is a voltage regulator belonging to the category of linear regulators. It is commonly used to provide a stable output voltage from a variable input voltage source. The device is known for its high efficiency, low dropout voltage, and excellent line and load regulation. The L4971 is available in various packages, including TO-220 and D2PAK, and is typically sold in quantities of one or more.

Specifications

• Input Voltage Range: 4.4V to 25V
• Output Voltage Range: 1.235V to 20V
• Maximum Output Current: 1.5A
• Dropout Voltage: 1.3V at 1A
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The L4971 has a standard pin configuration with input, output, ground, and adjustment pins. The detailed pinout is as follows: 1. Vin (Input) 2. Vout (Output) 3. GND (Ground) 4. Adj (Adjustment)

Functional Features

• High Efficiency: The L4971 offers high efficiency, making it suitable for applications where power conservation is crucial.
• Low Dropout Voltage: With a low dropout voltage, the regulator can maintain a stable output even when the input voltage is close to the desired output voltage.
• Excellent Line and Load Regulation: The device provides excellent line and load regulation, ensuring a consistent output voltage under varying conditions.

Advantages and Disadvantages

Advantages

• High efficiency
• Low dropout voltage
• Excellent line and load regulation

Disadvantages

• Limited maximum output current (1.5A)

Working Principles

The L4971 operates based on the principle of feedback control. It compares the actual output voltage to a reference voltage and adjusts the pass element to maintain a constant output voltage despite changes in the input voltage and load conditions.

Application Field Plans

The L4971 is widely used in various applications, including: - Battery-powered devices - Industrial automation systems - Consumer electronics - Automotive electronics

Alternative Models

Some alternative models to the L4971 include: - LM317: A popular adjustable linear voltage regulator with similar characteristics - LT1086: A low dropout positive adjustable regulator offering higher output current capability

In conclusion, the L4971 voltage regulator is a reliable and efficient component that finds extensive use in diverse electronic applications, providing stable and regulated power supply. Its high efficiency, low dropout voltage, and excellent line and load regulation make it a preferred choice for many design engineers.

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