UA78L12ACLPRE3 Series

series introduction

# Introduction to the UA78L12ACLPRE3 Product Series

## 1. Overview
The UA78L12ACLPRE3 belongs to a well - regarded family of voltage regulators. Voltage regulators are crucial components in electronic circuits as they ensure a stable output voltage regardless of variations in the input voltage or load current. This particular product series is designed to provide a reliable and precise +12V output, making it suitable for a wide range of applications in the electronics industry.

## 2. Key Features

### 2.1 Fixed Output Voltage
The UA78L12ACLPRE3 is specifically engineered to deliver a fixed output voltage of +12V. This fixed voltage output is highly beneficial in applications where a stable power supply is essential. For example, in microcontroller - based systems, a consistent 12V supply is required to ensure the proper functioning of various components such as sensors, actuators, and communication modules.

### 2.2 Low Dropout Voltage
It 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 effectively even when the input voltage is only slightly higher than the desired output voltage. This feature is particularly useful in battery - powered applications, where the battery voltage gradually decreases over time. With a low dropout voltage, the UA78L12ACLPRE3 can continue to provide a stable 12V output for a longer period as the battery discharges.

### 2.3 High Output Current Capability
The product series can handle a reasonable amount of output current. While the exact current rating may vary depending on the specific model and operating conditions, it is typically sufficient to power multiple low - to medium - power components simultaneously. This makes it suitable for use in small - scale electronic devices, such as portable audio players, small - sized test equipment, and simple control circuits.

### 2.4 Thermal Protection
To prevent damage due to overheating, the UA78L12ACLPRE3 is equipped with thermal protection. When the temperature of the regulator exceeds a certain threshold, the thermal protection mechanism kicks in and reduces the output current or shuts down the regulator temporarily. This ensures the long - term reliability and safety of the device, especially in applications where the regulator may be exposed to high ambient temperatures or operate under heavy load conditions.

### 2.5 Short - Circuit Protection
Another important safety feature is short - circuit protection. In the event of a short circuit at the output, the regulator automatically limits the current to a safe level, preventing excessive current flow that could damage the regulator itself or other components in the circuit. This protection mechanism enhances the overall robustness of the system and reduces the risk of component failure.

## 3. Package and Pin Configuration

### 3.1 Package Type
The UA78L12ACLPRE3 is available in a specific package type, which is designed to facilitate easy mounting on printed circuit boards (PCBs). The package provides mechanical protection for the internal components of the regulator and also helps in dissipating heat. The compact size of the package makes it suitable for use in space - constrained applications.

### 3.2 Pin Configuration
The regulator has a well - defined pin configuration. Typically, it has three main pins: the input pin, the output pin, and the ground pin. The input pin is connected to the power source, which should have a voltage higher than the desired output voltage. The output pin provides the regulated 12V voltage, which can be connected to the load. The ground pin is connected to the common ground of the circuit, providing a reference point for the electrical signals.

## 4. Applications

### 4.1 Consumer Electronics
In consumer

Images for reference

TO-92-3(StandardBody),TO-226_straightlead

Datasheets

Partlist

UA78L12ACLPRE3