LM2940CT-12

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LM2940CT-12

IC REG LINEAR 12V 1A TO220-3

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Thông số kỹ thuật

Part Status Obsolete
Base Product Number LM2940
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 26V
Voltage - Output (Min/Fixed) 12V
Voltage Dropout (Max) 0.8V @ 1A
Current - Output 1A
Current - Quiescent (Iq) 10 mA
Current - Supply (Max) 15 mA
PSRR 66dB (120Hz)
Protection Features Over Current, Over Temperature, Reverse Polarity, Short Circuit
Operating Temperature 0°C ~ 125°C
Mounting Type Through Hole
Package TO-220-3
Supplier Device Package TO-220-3
Packaging Tube

Tổng quan

Description

The LM2940CT-12 is a voltage regulator from the LM2940 series, designed to provide a stable 12V output with a low dropout voltage. It is commonly used in automotive and industrial applications where a reliable power supply is crucial. This linear regulator can deliver up to 1A of output current and offers features like short-circuit protection and thermal shutdown to enhance durability and safety.
Key characteristics of the LM2940CT-12 include a dropout voltage of approximately 0.5V at full load, which means it requires only a slightly higher input voltage than the output to function effectively. This makes it suitable for applications with limited voltage headroom. The regulator also boasts low quiescent current, enhancing efficiency when in standby mode.
The LM2940CT-12 is packaged in a TO-220 form factor, facilitating easy mounting and heat dissipation. With its robust performance and protective features, the LM2940CT-12 is ideal for powering sensitive electronics that require a precise 12V supply, ensuring optimal performance and longevity.

Features

The LM2940CT-12 is a positive voltage regulator known for its low dropout voltage and reliable performance. Key features include:
1. Output Voltage: Provides a fixed output of 12V.
2. Low Dropout Voltage: Typically around 0.5V at full load, suitable for low voltage applications.
3. Output Current: Capable of delivering up to 1A of output current.
4. Maximum Input Voltage: Can handle up to 26V input voltage.
5. Protection Features: Includes current limiting and thermal protection to prevent damage from overload or overheating.
6. Low Quiescent Current: Consumes minimal current when not fully loaded, thereby improving overall efficiency.
7. Stability: Requires only a small output capacitor for stability, simplifying circuit design.
8. Package: Available in a TO-220 package, providing easy mounting and heat dissipation.
9. Temperature Range: Operates effectively over a wide temperature range, typically from -40°C to +125°C.
These features make the LM2940CT-12 suitable for various applications, including powering microcontrollers, communication circuits, and other sensitive electronics that require stable 12V power.

Package

The LM2940CT-12 is a low dropout voltage regulator packaged in a TO-220. This package type, TO-220, is commonly used for power semiconductors and features three leads, offering good thermal performance and easy mounting to heat sinks.

Pinout

The LM2940CT-12 is a positive voltage regulator integrated circuit designed for low dropout applications. It typically comes in a TO-220 package with three pins.
1. Pin 1 (Input): This pin is where the unregulated input voltage is applied. It should be higher than the desired output voltage by at least the dropout voltage to ensure proper operation.
2. Pin 2 (Ground): This pin is connected to the ground or common reference point of the circuit. It serves as the return path for input and output currents.
3. Pin 3 (Output): This pin provides the regulated output voltage, which in this case is fixed at 12V. It supplies a stable voltage to the connected load.
The LM2940CT-12 is known for its low dropout voltage, which makes it suitable for applications where the difference between input and output voltage is small. It can deliver up to 1A of output current and features protections like current limiting and thermal shutdown to ensure reliable operation.

Manufacturer

The LM2940CT-12 is a low dropout regulator that is commonly manufactured by Texas Instruments. Texas Instruments (TI) is a global semiconductor company that designs and manufactures a wide range of integrated circuits and electronic components. TI is known for its innovation in the semiconductor industry, providing solutions in areas such as power management, analog and digital signal processing, and microcontrollers. The company serves various industries, including automotive, industrial, consumer electronics, and communications.

Application

The LM2940CT-12 is a 12V voltage regulator commonly used in applications requiring stable voltage supply, such as automotive electronics, consumer products, and industrial equipment. Its low dropout voltage and low noise make it ideal for battery-powered devices, microcontroller systems, and RF applications. It is also used in power management systems, communication devices, and sensors.

Equivalent

The LM2940CT-12 is a 12V low dropout linear voltage regulator. Equivalent products include the MIC29300-12WT, LT1086CT-12, and the UA7812 in certain applications. Also, other manufacturers like ON Semiconductor, STMicroelectronics, and Fairchild Semiconductor may offer similar 12V LDO regulators. Always check the datasheets for compatibility in terms of dropout voltage, current output, and other electrical characteristics to ensure they meet your specific requirements.

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