AS78L05Z-E1
Low dropout linear voltage regulators for stable power supply
Manufacturer： diodes
series introduction
# AS78L05Z - E1 Product Series Introduction
## 1. Overview
The AS78L05Z - E1 is a highly reliable and widely - used voltage regulator product series. It belongs to the family of linear voltage regulators, which are essential components in various electronic circuits. These regulators are designed to provide a stable output voltage regardless of fluctuations in the input voltage or changes in the load current, ensuring the proper and consistent operation of electronic devices.
## 2. Key Features
### 2.1 Fixed Output Voltage
The AS78L05Z - E1 is specifically engineered to deliver a fixed output voltage of 5V. This precise output voltage is crucial for many electronic components that require a stable 5V power supply, such as microcontrollers, sensors, and some integrated circuits. For example, in a microcontroller - based project, a stable 5V supply is necessary to ensure accurate data processing and reliable communication between different parts of the circuit.
### 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 AS78L05Z - E1 can operate effectively even when the input voltage is only slightly higher than the 5V output voltage. This feature is particularly useful in battery - powered applications, where the battery voltage gradually decreases over time. For instance, in a portable device powered by a single lithium - ion battery (which has a nominal voltage of around 3.7V and can drop to 3V when discharged), the low dropout voltage of the AS78L05Z - E1 allows it to still provide a stable 5V output for a longer period.
### 2.3 High Output Current Capability
The product series can handle a reasonable amount of output current. Although it is not designed for high - power applications, it can supply sufficient current to power multiple low - power components simultaneously. This makes it suitable for small - scale electronic projects, such as home automation sensors, wearable devices, and simple IoT nodes. For example, it can power several small - sized sensors and a low - power microcontroller in an environmental monitoring system.
### 2.4 Thermal Protection
The AS78L05Z - E1 is equipped with thermal protection circuitry. When the device's temperature rises above a certain threshold due to excessive power dissipation (for example, when the input - output voltage difference is large and the output current is high), the thermal protection mechanism kicks in. It reduces the output current or shuts down the regulator temporarily to prevent overheating and potential damage to the device. This feature enhances the reliability and longevity of the regulator, especially in applications where the operating environment may be hot or where the device may experience occasional high - load conditions.
### 2.5 Short - Circuit Protection
It also features short - circuit protection. In case of a short - circuit at the output (for example, if a wire accidentally touches the ground or another low - impedance path), the regulator will limit the output current to a safe level. This protects both the regulator itself and other components in the circuit from damage caused by excessive current flow.
## 3. Package and Pin Configuration
### 3.1 Package Type
The AS78L05Z - E1 is typically available in a small - sized surface - mount package. The compact size of the package makes it suitable for use in printed circuit boards (PCBs) with limited space, such as those found in mobile devices, smart cards, and other miniaturized electronic products.
### 3.2 Pin Configuration
The regulator usually has three pins: the input pin (VIN), the output pin (VOUT), and the ground pin (GND
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