LP2950CN-L-3-3

Product Overview

Category: Integrated Circuits (ICs)

Use: Voltage Regulator

Characteristics: - Low Dropout Voltage - Low Quiescent Current - Thermal Shutdown Protection - Short Circuit Current Limiting - Wide Input Voltage Range

Package: TO-92

Essence: The LP2950CN-L-3-3 is a low dropout voltage regulator designed to provide a regulated output voltage even when the input voltage is very close to the desired output voltage.

Packaging/Quantity: The LP2950CN-L-3-3 is typically sold in reels or tubes, with a quantity of 1000 units per reel/tube.

Specifications

• Output Voltage: 3.3V
• Dropout Voltage: 0.5V (typical)
• Quiescent Current: 75µA (typical)
• Maximum Input Voltage: 30V
• Maximum Output Current: 100mA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LP2950CN-L-3-3 has three pins:

1. Input (IN): Connects to the input voltage source.
2. Ground (GND): Connects to the ground reference.
3. Output (OUT): Provides the regulated output voltage.

Functional Features

• Low Dropout Voltage: The LP2950CN-L-3-3 has a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is only slightly higher than the desired output voltage.
• Low Quiescent Current: The regulator has a low quiescent current, minimizing power consumption when the load is light.
• Thermal Shutdown Protection: It includes thermal shutdown protection to prevent damage due to excessive temperature.
• Short Circuit Current Limiting: The regulator has short circuit current limiting to protect against excessive current draw.
• Wide Input Voltage Range: It can accept a wide range of input voltages, making it suitable for various applications.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures stable output even with low input voltage. - Low quiescent current minimizes power consumption. - Thermal shutdown protection prevents damage from overheating. - Short circuit current limiting protects against excessive current draw. - Wide input voltage range allows for versatile applications.

Disadvantages: - Limited maximum output current (100mA). - TO-92 package may not be suitable for all applications requiring higher power dissipation.

Working Principles

The LP2950CN-L-3-3 is a linear voltage regulator that uses a PNP pass transistor to regulate the output voltage. When the input voltage is higher than the desired output voltage, the pass transistor conducts and regulates the output voltage to the desired level. The regulator maintains a constant voltage drop across the pass transistor, resulting in a stable output voltage.

Detailed Application Field Plans

The LP2950CN-L-3-3 is commonly used in various electronic devices and systems that require a stable and regulated 3.3V power supply. Some typical application fields include:

1. Battery-Powered Devices: Portable electronics such as smartphones, tablets, and wearable devices often require a regulated 3.3V supply for their internal circuitry.
2. Embedded Systems: Microcontrollers, sensors, and other components in embedded systems often rely on a stable 3.3V power source provided by the LP2950CN-L-3-3.
3. Industrial Control Systems: The regulator can be used in industrial control systems to provide a reliable power source for various control circuits and sensors.
4. Automotive Electronics: Certain automotive electronics, such as dashboard displays and control modules, may require a regulated 3.3V supply.

Detailed and Complete Alternative Models

• LM1117-3.3: A popular alternative with similar specifications and package options.
• MCP1700-3302E/TO: Another alternative with comparable performance and package options.
• AMS1117-3.3: An alternative voltage regulator with similar characteristics and pin configuration.

These alternative models can be considered based on specific application requirements and availability in the market.

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