Specifications
| Attribute | Value |
| Package | Tube |
| ProductStatus | Active |
| OutputConfiguration | Negative |
| OutputType | Fixed |
| NumberofRegulators | 1 |
| Voltage-Input(Max) | -35V |
| Voltage-Output(Min/Fixed) | -12V |
| VoltageDropout(Max) | 1.1V @ 1A (Typ) |
| Current-Output | 1.5A |
| Current-Quiescent(Iq) | 3 mA |
| PSRR | 60dB (120Hz) |
| ProtectionFeatures | Over Temperature, Short Circuit |
| OperatingTemperature | 0°C ~ 125°C |
| MountingType | Through Hole |
| Package/Case | TO-220-3 |
Overview
Description
The L7912CV is a voltage regulator integrated circuit (IC) commonly used in electronic circuits to provide a stable negative output voltage. It is part of the 79xx series of fixed-voltage regulators. Specifically, the L7912CV is designed to deliver a constant output voltage of -12 volts with a maximum output current of 1.5 amperes, making it suitable for various electronic applications requiring a reliable -12V power supply.
This IC is known for its ease of use, requiring only minimal external components—typically just a couple of capacitors for stability—to function effectively. It features built-in protection mechanisms, including thermal shutdown and short-circuit protection, enhancing its reliability and safety in circuit designs.
The L7912CV is packaged in a TO-220 form factor, allowing for easy mounting on a heatsink to dissipate excess heat during operation. Its robust design and reliable performance make it a popular choice for powering negative voltage components in audio equipment, communication devices, and other electronic systems.
This IC is known for its ease of use, requiring only minimal external components—typically just a couple of capacitors for stability—to function effectively. It features built-in protection mechanisms, including thermal shutdown and short-circuit protection, enhancing its reliability and safety in circuit designs.
The L7912CV is packaged in a TO-220 form factor, allowing for easy mounting on a heatsink to dissipate excess heat during operation. Its robust design and reliable performance make it a popular choice for powering negative voltage components in audio equipment, communication devices, and other electronic systems.
Equivalent
The L7912CV is a negative voltage regulator providing a -12V output. Equivalent products include:
1. LM7912: A popular equivalent from various manufacturers.
2. MC7912: Offered by ON Semiconductor.
3. KA7912: Produced by Fairchild Semiconductor.
4. UA7912: Available from Texas Instruments.
5. NTE7912: Provided by NTE Electronics.
Ensure compatibility by checking datasheets for specific electrical characteristics and package types.
1. LM7912: A popular equivalent from various manufacturers.
2. MC7912: Offered by ON Semiconductor.
3. KA7912: Produced by Fairchild Semiconductor.
4. UA7912: Available from Texas Instruments.
5. NTE7912: Provided by NTE Electronics.
Ensure compatibility by checking datasheets for specific electrical characteristics and package types.
Features
The L7912CV is a voltage regulator from the 79xx series, commonly used to provide a stable output voltage. Here are its key features:
1. Negative Voltage Regulation: Provides a stable output of -12V.
2. Output Current: Can deliver up to 1.5A of output current with proper heat sinking.
3. Thermal Overload Protection: Integrated protection against overheating.
4. Short-Circuit Current Limiting: Built-in mechanisms to prevent damage in case of a short circuit.
5. Safe Area Protection: Ensures reliable performance by maintaining the device within safe operating conditions.
6. Dropout Voltage: Typically requires around 2V higher input voltage than output voltage for proper regulation.
7. Package Type: Usually available in a TO-220 package, which aids in heat dissipation.
8. Applications: Suitable for use in power supplies, battery chargers, and other circuits requiring a stable negative voltage.
These features make the L7912CV a reliable component for various electronic applications requiring a consistent negative voltage supply.
1. Negative Voltage Regulation: Provides a stable output of -12V.
2. Output Current: Can deliver up to 1.5A of output current with proper heat sinking.
3. Thermal Overload Protection: Integrated protection against overheating.
4. Short-Circuit Current Limiting: Built-in mechanisms to prevent damage in case of a short circuit.
5. Safe Area Protection: Ensures reliable performance by maintaining the device within safe operating conditions.
6. Dropout Voltage: Typically requires around 2V higher input voltage than output voltage for proper regulation.
7. Package Type: Usually available in a TO-220 package, which aids in heat dissipation.
8. Applications: Suitable for use in power supplies, battery chargers, and other circuits requiring a stable negative voltage.
These features make the L7912CV a reliable component for various electronic applications requiring a consistent negative voltage supply.
Pinout
The L7912CV is a three-terminal negative voltage regulator with a fixed output voltage of -12V. It is part of the 79xx series of voltage regulators. The device is commonly used to provide a stable -12V output from a higher voltage input. Here are the pin details:
1. Pin 1 (Input): This is where the unregulated input voltage is applied. It must be more negative than -14.5V for proper operation.
2. Pin 2 (Ground/Common): This pin serves as the ground reference point for the regulator. It is connected to the negative side of the input and output.
3. Pin 3 (Output): This pin provides the regulated -12V output.
The L7912CV can supply up to 1.5A of output current, provided that it is properly heat-sinked. It is widely used in power supply circuits where a -12V output is required.
1. Pin 1 (Input): This is where the unregulated input voltage is applied. It must be more negative than -14.5V for proper operation.
2. Pin 2 (Ground/Common): This pin serves as the ground reference point for the regulator. It is connected to the negative side of the input and output.
3. Pin 3 (Output): This pin provides the regulated -12V output.
The L7912CV can supply up to 1.5A of output current, provided that it is properly heat-sinked. It is widely used in power supply circuits where a -12V output is required.
Manufacturer
The L7912CV is manufactured by STMicroelectronics, a global semiconductor company. STMicroelectronics is one of the world's leading manufacturers of semiconductors, providing a wide range of electronic components and solutions for various applications. The company specializes in developing and producing integrated circuits for use in electronic devices across multiple industries, including automotive, industrial, personal electronics, communications equipment, and more.
STMicroelectronics is known for its expertise in analog and digital components, microcontrollers, sensors, power management, and more. Their products are widely used in applications that require reliable and efficient electronic components, such as in power supplies, consumer electronics, and industrial systems. With a strong focus on innovation and sustainability, STMicroelectronics continues to play a significant role in advancing technology and enabling the development of smart and energy-efficient solutions.
STMicroelectronics is known for its expertise in analog and digital components, microcontrollers, sensors, power management, and more. Their products are widely used in applications that require reliable and efficient electronic components, such as in power supplies, consumer electronics, and industrial systems. With a strong focus on innovation and sustainability, STMicroelectronics continues to play a significant role in advancing technology and enabling the development of smart and energy-efficient solutions.
Application
The L7912CV is a voltage regulator commonly used in various electronic applications. Its primary application is to provide a stable -12V output from a higher voltage input, typically in power supply circuits. It is also used in:
1. Electronic Equipment: Provides regulated power supply for components requiring a -12V source.
2. Analog and Digital Circuits: Ensures stable voltage for sensitive components.
3. Communication Devices: Powers circuits within telecom systems.
4. Industrial Automation: Powers sensors and control units.
5. Consumer Electronics: Used in devices requiring negative voltage regulation for certain components.
These regulators provide over-current and thermal protection, ensuring reliability and safety in diverse applications.
1. Electronic Equipment: Provides regulated power supply for components requiring a -12V source.
2. Analog and Digital Circuits: Ensures stable voltage for sensitive components.
3. Communication Devices: Powers circuits within telecom systems.
4. Industrial Automation: Powers sensors and control units.
5. Consumer Electronics: Used in devices requiring negative voltage regulation for certain components.
These regulators provide over-current and thermal protection, ensuring reliability and safety in diverse applications.
Package
The L7912CV is a linear voltage regulator, and it typically comes in a TO-220 package. This package type is commonly used for power semiconductors, featuring three leads and a tab for efficient heat dissipation.
