L78L12ACUTR
Compact 12V 0.1A linear voltage regulators in SOT89 package
Manufacturer： stm
series introduction
# Introduction to the L78L12ACUTR Product Series
## 1. Overview
The L78L12ACUTR is a member of a well - regarded series of voltage regulators. These regulators are designed to provide a stable and reliable output voltage, which is crucial in a wide range of electronic circuits. They are part of the linear voltage regulator family, known for their simplicity, low noise, and good regulation characteristics.
## 2. Key Specifications
### 2.1 Output Voltage
The "12" in the L78L12ACUTR model number indicates that it is designed to provide a fixed output voltage of +12V. This precise output voltage is maintained within a certain tolerance range, typically with a high degree of accuracy, ensuring that connected electronic components receive the correct power supply.
### 2.2 Input Voltage Range
The L78L12ACUTR can handle a relatively wide input voltage range. It can accept an input voltage that is significantly higher than the output voltage. For example, it can typically operate with an input voltage ranging from around 14V to 35V. This wide input voltage range makes it suitable for use in various power supply systems where the input voltage may vary.
### 2.3 Output Current
This regulator is capable of supplying a maximum output current. The "L" in the model number often indicates a low - power version. The L78L12ACUTR can typically provide an output current of up to 100mA. This makes it ideal for powering small - scale electronic circuits, such as sensor modules, low - power microcontrollers, and other low - current devices.
### 2.4 Line and Load Regulation
- **Line Regulation**: It refers to the ability of the regulator to maintain a constant output voltage when the input voltage changes. The L78L12ACUTR has excellent line regulation characteristics, ensuring that the output voltage remains stable even if there are fluctuations in the input voltage.
- **Load Regulation**: This parameter measures how well the regulator can keep the output voltage constant when the load current changes. The L78L12ACUTR offers good load regulation, meaning that the output voltage will not vary significantly as the load on the regulator changes.
### 2.5 Thermal Performance
The regulator is designed with thermal protection features. It has a built - in thermal shutdown mechanism that activates when the device temperature exceeds a certain threshold. This protects the regulator from damage due to overheating, ensuring its long - term reliability and safety.
## 3. Package and Pinout
### 3.1 Package Type
The L78L12ACUTR is typically available in a small - sized surface - mount package, such as the SOT - 223. This package is compact, which is beneficial for applications where space is limited, such as in portable electronic devices and printed circuit boards (PCBs) with high component density.
### 3.2 Pinout
- **Input Pin**: This pin is used to connect the input voltage source to the regulator. The input voltage should be within the specified range for proper operation.
- **Output Pin**: The regulated +12V output voltage is available at this pin. It is connected to the load that requires a stable 12V power supply.
- **Ground Pin**: This pin is connected to the ground reference of the circuit. It provides the return path for the current flowing through the regulator and the load.
## 4. Applications
### 4.1 Consumer Electronics
In consumer electronics, the L78L12ACUTR can be used in devices such as portable media players, wireless earbuds charging cases, and small - sized digital cameras. It provides a stable 12V power supply for the internal circuits, ensuring proper operation
Images for reference
SOT-89 SERIES
Image Preview
Image Preview