LM346N

Product Overview

Category: Integrated Circuit (IC)

Use: LM346N is a voltage regulator IC primarily used for regulating and stabilizing electrical voltage in various electronic devices.

Characteristics: - High precision voltage regulation - Low dropout voltage - Wide input voltage range - Thermal shutdown protection - Short circuit protection

Package: LM346N is available in a standard 8-pin dual in-line package (DIP).

Essence: The essence of LM346N lies in its ability to provide stable and regulated voltage output, ensuring the proper functioning of electronic circuits.

Packaging/Quantity: LM346N is typically sold in reels or tubes containing a quantity of 50 units per package.

Specifications

• Input Voltage Range: 4.5V to 40V
• Output Voltage Range: 1.2V to 37V
• Dropout Voltage: 0.5V (typical)
• Output Current: Up to 1.5A
• Quiescent Current: 10mA (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM346N IC has the following pin configuration:

```

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| | --| Vout Vin|-- --| GND Adj|-- --| NC NC |-- |___________| ```

Pin Description: - Vout: Output voltage pin - Vin: Input voltage pin - GND: Ground pin - Adj: Adjust pin (used for setting the desired output voltage) - NC: Not connected pins

Functional Features

1. Voltage Regulation: LM346N ensures precise voltage regulation, maintaining a stable output voltage even with varying input voltages.
2. Low Dropout Voltage: The IC exhibits low dropout voltage, minimizing power dissipation and maximizing efficiency.
3. Wide Input Voltage Range: LM346N can handle a wide range of input voltages, making it suitable for various applications.
4. Thermal Shutdown Protection: The IC incorporates thermal shutdown protection, preventing damage due to excessive heat.
5. Short Circuit Protection: LM346N features built-in short circuit protection, safeguarding the circuit from potential damage.

Advantages and Disadvantages

Advantages: - High precision voltage regulation - Low dropout voltage - Wide input voltage range - Thermal and short circuit protection enhance reliability - Compact and easy-to-use package

Disadvantages: - Limited output current capacity (up to 1.5A) - Not suitable for high-power applications

Working Principles

LM346N operates based on the principle of feedback control. It compares the output voltage with a reference voltage and adjusts the internal circuitry to maintain a stable output voltage. By continuously monitoring and adjusting, the IC compensates for any fluctuations in the input voltage, ensuring a consistent and regulated output.

Detailed Application Field Plans

LM346N finds application in various electronic devices and systems, including but not limited to: 1. Power supplies for consumer electronics 2. Battery charging circuits 3. Automotive electronics 4. Industrial control systems 5. Portable electronic devices

Detailed and Complete Alternative Models

1. LM317: Similar voltage regulator IC with adjustable output voltage.
2. LM7805: Fixed 5V voltage regulator IC.
3. LM1117: Low dropout voltage regulator IC with adjustable or fixed output voltage options.
4. LT1083: High current, adjustable voltage regulator IC.

These alternative models offer similar functionality and can be used as substitutes for LM346N depending on specific requirements.

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