LM217LZ-TR

Product Overview

Category

LM217LZ-TR belongs to the category of voltage regulators.

Use

It is commonly used to regulate and stabilize voltage in electronic circuits.

Characteristics

• LM217LZ-TR is a three-terminal adjustable positive voltage regulator.
• It provides a regulated output voltage ranging from 1.2V to 37V.
• The device can deliver up to 1.5A of output current.
• It exhibits low dropout voltage, ensuring efficient regulation even when the input voltage is close to the desired output voltage.
• LM217LZ-TR has built-in thermal overload protection and short-circuit current limiting features, enhancing its reliability and safety.

Package

LM217LZ-TR is available in a TO-92 package, which is a small plastic package with three leads.

Essence

The essence of LM217LZ-TR lies in its ability to maintain a stable output voltage despite variations in the input voltage or load conditions.

Packaging/Quantity

LM217LZ-TR is typically sold in reels or tubes, containing a specific quantity of units per package.

Specifications

• Input Voltage Range: 4.2V to 40V
• Output Voltage Range: 1.2V 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

Detailed Pin Configuration

LM217LZ-TR has three pins:

1. Input Pin (Vin): This pin is connected to the input voltage source.
2. Output Pin (Vout): The regulated output voltage is obtained from this pin.
3. Ground Pin (GND): This pin is connected to the ground reference.

Functional Features

• LM217LZ-TR provides a stable output voltage, compensating for variations in input voltage and load conditions.
• It offers thermal overload protection, preventing damage due to excessive temperature.
• The device incorporates short-circuit current limiting, safeguarding against potential short-circuit hazards.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile applications.
• High output current capability enables it to power various electronic components.
• Low dropout voltage ensures efficient regulation even with low input-output voltage differentials.
• Built-in protection features enhance reliability and safety.

Disadvantages

• Limited maximum output voltage of 37V may not be suitable for certain high-voltage applications.
• TO-92 package may have size limitations for complex circuit designs.

Working Principles

LM217LZ-TR operates based on the principle of linear voltage regulation. It uses a series pass transistor to regulate the output voltage. By comparing the feedback voltage with a reference voltage, the device adjusts the pass transistor's resistance to maintain a constant output voltage.

Detailed Application Field Plans

LM217LZ-TR finds applications in various fields, including: 1. Power supply circuits for electronic devices. 2. Battery charging circuits. 3. Automotive electronics. 4. Industrial control systems. 5. Audio amplifiers.

Detailed and Complete Alternative Models

Some alternative models to LM217LZ-TR include: 1. LM317T: Similar adjustable positive voltage regulator with higher output current capability. 2. LM1117-ADJ: Fixed output voltage regulator with adjustable output voltage. 3. LT1083CP: Adjustable positive voltage regulator with higher output current and wider input voltage range.

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