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L7812

Name: L7812
Rating: 4.7 (12 reviews)

IC REG LINEAR 12V 1.5A TO220

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資料表 L7812 DataSheet
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規格

Series	L78
Part Status	Active
Output Configuration	Positive
Output Type	Fixed
Number of Regulators	1
Voltage - Input (Max)	35V
Voltage - Output (Min/Fixed)	12V
Voltage Dropout (Max)	2V @ 1A
Current - Output	1.5A
Current - Quiescent (Iq)	8 mA
PSRR	55dB (120Hz)
Protection Features	Over Current, Over Temperature, Short Circuit
Operating Temperature	-25°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3
Supplier Device Package	TO-220

概述

Description

The L7812 is a voltage regulator integrated circuit (IC) that provides a stable output voltage of 12 volts. It is part of the L78xx series of linear voltage regulators, which are designed to provide a fixed output voltage from a higher input voltage. The L7812 can handle input voltages ranging from 14.5V to 30V and typically delivers a maximum output current of 1.5A, making it suitable for various applications, including power supplies for electronic devices.
The device features built-in thermal overload protection and short-circuit protection, ensuring reliability and safety during operation. The pin configuration typically includes three pins: input, ground, and output. When using the L7812, additional capacitors (usually a 0.33µF input and a 0.1µF output) are recommended for improved stability and transient response.
Overall, the L7812 is widely used in consumer electronics, DIY projects, and industrial applications due to its ease of use and robustness.

Features

The L7812 is a voltage regulator that provides a fixed output voltage of 12V. Key features include:
1. Output Voltage: Provides a stable 12V output.
2. Output Current: Capable of delivering up to 1.5A of output current.
3. Thermal Protection: Integrated thermal overload protection to prevent damage from overheating.
4. Short Circuit Protection: Built-in short circuit protection to safeguard the device and connected components.
5. Input Voltage Range: Accepts a wide input voltage range, typically from 14V to 35V.
6. Low Dropout Voltage: Low dropout voltage ensures functionality even with minimal voltage difference between input and output.
7. Easy to Use: Requires only a few external capacitors for stability and proper filtering.
8. TO-220 Package: Available in a TO-220 package for easy mounting and heat dissipation.
These features make the L7812 suitable for various applications, including powering microcontrollers, sensors, and other electronic circuits.

Package

The L7812 voltage regulator typically comes in a TO-220 package type, which features three pins for input, output, and ground connections. This package allows for efficient heat dissipation and is commonly used in various electronic applications.

Pinout

The L7812 is a three-terminal voltage regulator that provides a fixed output voltage of +12V. It typically comes in a TO-220 package, which has three pins.
The pin configuration is as follows:
1. Input (Vin): This pin is connected to the input voltage source, which should be higher than the 12V output.
2. Ground (GND): This pin is connected to the ground or 0V reference of the circuit.
3. Output (Vout): This pin supplies the regulated +12V output voltage.
The L7812 is designed to handle input voltages up to 35V and can provide a maximum output current of 1.5A, with thermal overload and short-circuit protection features. It is commonly used in power supply circuits to provide a stable voltage for various electronic devices.

Manufacturer

The L7812 is a voltage regulator manufactured by several companies, but it is most commonly associated with STMicroelectronics. STMicroelectronics is a global semiconductor manufacturer headquartered in Geneva, Switzerland. The company designs and produces a wide range of semiconductor devices and solutions for various applications, including automotive, industrial, and consumer electronics. As a major player in the electronics industry, STMicroelectronics focuses on innovation and sustainability, providing products that meet the growing demand for energy efficiency and advanced technology.

Application

The L7812 is a voltage regulator that provides a stable 12V output. Its application areas include powering microcontrollers, sensors, and other electronic circuits in automotive, industrial, and consumer electronics. It is commonly used in power supply designs, battery chargers, and LED drivers, ensuring consistent voltage and protecting against fluctuations. Its ease of use and reliability make it suitable for both prototyping and final products.

Equivalent

The L7812 voltage regulator has several equivalent products, including:
1. LM7812
2. KA7812
3. 7812
4. LD1084-12
5. LM1084-12
These alternatives offer similar 12V output and specifications. Always check the datasheet for the specific application requirements.