LM2742MTCX/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - High efficiency - Wide input voltage range - Adjustable output voltage - Low dropout voltage - Overcurrent protection - Thermal shutdown protection

Package: SOT-23-6

Essence: The LM2742MTCX/NOPB is a voltage regulator IC that provides a regulated output voltage from an unregulated input voltage source.

Packaging/Quantity: The LM2742MTCX/NOPB is available in tape and reel packaging, with 3000 units per reel.

Specifications

• Input Voltage Range: 4.5V to 36V
• Output Voltage Range: 1.23V to 20V
• Output Current: Up to 500mA
• Dropout Voltage: 250mV at 500mA
• Quiescent Current: 50µA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LM2742MTCX/NOPB has six pins arranged as follows:

```

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| | --| VIN GND |-- Pin 1: Ground --| EN FB |-- Pin 2: Feedback --| SW NC |-- Pin 3: No Connection --| SW NC |-- Pin 4: No Connection --| VOUT NC |-- Pin 5: No Connection --| VIN NC |-- Pin 6: No Connection |___________| ```

Functional Features

1. High Efficiency: The LM2742MTCX/NOPB offers high efficiency, minimizing power losses during voltage regulation.
2. Wide Input Voltage Range: It can accept input voltages ranging from 4.5V to 36V, making it suitable for various applications.
3. Adjustable Output Voltage: The output voltage can be adjusted within the range of 1.23V to 20V, providing flexibility for different requirements.
4. Low Dropout Voltage: With a dropout voltage of only 250mV at 500mA, the LM2742MTCX/NOPB ensures efficient power conversion even with low input-output voltage differentials.
5. Overcurrent Protection: The IC incorporates overcurrent protection, safeguarding the circuit and load from excessive current.
6. Thermal Shutdown Protection: It includes thermal shutdown protection, preventing damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power consumption. - Wide input voltage range allows for versatile applications. - Adjustable output voltage provides flexibility. - Low dropout voltage minimizes power losses. - Overcurrent and thermal shutdown protection enhance reliability.

Disadvantages: - Limited output current capacity (up to 500mA). - No built-in short-circuit protection.

Working Principles

The LM2742MTCX/NOPB operates as a step-down voltage regulator. It uses a switching mechanism to efficiently convert the higher input voltage to a lower regulated output voltage. The internal control circuitry adjusts the duty cycle of the switching transistor to maintain the desired output voltage despite variations in the input voltage and load conditions.

Detailed Application Field Plans

The LM2742MTCX/NOPB is commonly used in various applications, including but not limited to: - Power supplies for industrial equipment - Battery-powered devices - Automotive electronics - Telecommunications equipment - LED lighting systems

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LM2742MTCX/NOPB are: - LM2576-ADJ - LM2596S-ADJ - LM317T - LT1083CP

These models can be considered as alternatives based on specific requirements and design constraints.

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