L7812ABV-DG
12V linear voltage regulators with 1.5A output in TO220 package
Manufacturer： stm
series introduction
# Introduction to the L7812ABV - DG Product Series
## 1. Overview
The L7812ABV - DG belongs to a well - established family of voltage regulators. These regulators are designed to provide a stable and reliable output voltage, making them an essential component in a wide range of electronic circuits. The "L78" series has a long - standing reputation for quality and performance, and the L7812ABV - DG builds on this legacy with enhanced features and improved specifications.
## 2. Key Features
### 2.1 Fixed Output Voltage
The most prominent feature of the L7812ABV - DG is its ability to provide a fixed output voltage of +12V. This fixed voltage output is crucial in applications where a stable power supply is required for the proper functioning of other components. For example, in microcontroller - based systems, a stable 12V supply can power sensors, actuators, and other peripheral devices, ensuring consistent and accurate operation.
### 2.2 High Current Capability
This voltage regulator can handle relatively high output currents. It is capable of supplying up to a certain rated current (which should be specified in the detailed datasheet), making it suitable for powering multiple components simultaneously. This high - current capability is beneficial in applications such as powering small motors, audio amplifiers, or multiple integrated circuits on a single printed circuit board (PCB).
### 2.3 Built - in Protection Mechanisms
- **Over - current Protection**: The L7812ABV - DG is equipped with over - current protection. In case the output current exceeds the safe operating limit, the regulator will automatically limit the current to prevent damage to itself and the connected components. This is especially important in applications where short - circuits or sudden load changes can occur.
- **Thermal Protection**: Thermal protection is another vital feature. When the temperature of the regulator rises above a certain threshold due to high power dissipation, the regulator will reduce its output current or even shut down to prevent overheating. This helps in extending the lifespan of the device and ensures reliable operation under various environmental conditions.
### 2.4 Low Dropout Voltage
The regulator has a relatively low dropout voltage. Dropout voltage is the minimum difference between the input voltage and the output voltage required for the regulator to maintain a stable output. A low dropout voltage means that the regulator can operate efficiently even when the input voltage is only slightly higher than the output voltage. This is advantageous in battery - powered applications, where conserving battery life is crucial.
## 3. Technical Specifications
### 3.1 Input Voltage Range
The L7812ABV - DG has a specified input voltage range. The input voltage must be higher than the output voltage (12V) by at least the dropout voltage. For example, if the dropout voltage is 2V, the minimum input voltage should be around 14V. The maximum input voltage is also defined, and exceeding this value can damage the regulator.
### 3.2 Output Voltage Tolerance
The output voltage of the L7812ABV - DG has a certain tolerance. This means that the actual output voltage may deviate slightly from the nominal 12V value. The tolerance is typically specified as a percentage, such as ±2%. So, the actual output voltage can range from 11.76V to 12.24V under normal operating conditions.
### 3.3 Operating Temperature Range
The regulator is designed to operate within a specific temperature range. This range is important as the performance of the regulator can be affected by temperature. For example, the output voltage may vary slightly with temperature changes. The L7812ABV - DG can typically operate in a temperature range from - 40°C to
Images for reference
TO-220-3
Image Preview
Image Preview