L78M05CDT-TR
5V 0.5A positive linear voltage regulators in DPAK package
Manufacturer： stm
series introduction
# Introduction to the L78M05CDT - TR Product Series
## 1. Overview
The L78M05CDT - TR belongs to a well - established family of voltage regulators. These regulators are crucial components in electronic circuits, providing a stable and reliable output voltage regardless of fluctuations in the input voltage or variations in the load current. This particular product is designed to offer a fixed +5V output, which is a standard voltage level widely used in a vast array of electronic devices, from simple consumer electronics to complex industrial control systems.
## 2. Key Features
### 2.1 Voltage Regulation
- **Fixed Output Voltage**: The L78M05CDT - TR is engineered to deliver a precise +5V output voltage. This fixed voltage is essential for the proper functioning of many integrated circuits, microcontrollers, and other electronic components that require a stable power supply. For example, in a microcontroller - based project, a stable 5V supply ensures accurate data processing and reliable operation of the device.
- **Low Dropout Voltage**: It has a relatively low dropout voltage, which means it can maintain the regulated output voltage even when the input voltage is only slightly higher than the output voltage. This feature is beneficial in battery - powered applications where the battery voltage gradually decreases over time. The low dropout characteristic allows the regulator to continue providing a stable 5V output for a longer period, maximizing the battery's useful life.
### 2.2 Current Handling Capability
- **Adequate Output Current**: This regulator can supply a significant amount of output current, typically up to a certain specified limit. This makes it suitable for powering multiple components simultaneously. For instance, in a small - scale embedded system, it can power several sensors, an LCD display, and a microcontroller all at once, thanks to its ability to handle the combined load current requirements.
### 2.3 Thermal Performance
- **Thermal Protection**: The L78M05CDT - TR is equipped with built - in thermal protection mechanisms. When the device's temperature rises above a safe operating limit due to excessive power dissipation, the thermal protection circuit kicks in and reduces the output current or shuts down the regulator to prevent damage. This feature enhances the reliability and longevity of the regulator, especially in high - power or high - temperature environments.
- **Good Thermal Dissipation**: It is designed with a package that allows for efficient heat transfer. The package is optimized to dissipate heat generated during operation, ensuring that the device remains within its safe temperature range under normal operating conditions.
### 2.4 Line and Load Regulation
- **Excellent Line Regulation**: It can maintain a stable output voltage even when there are significant variations in the input voltage. This is important in applications where the input power source may be subject to fluctuations, such as in power grids with poor voltage stability. The regulator can effectively filter out these input voltage variations and provide a constant 5V output.
- **Good Load Regulation**: The output voltage remains relatively constant regardless of changes in the load current. Whether the load is light or heavy, the regulator can adjust its internal circuitry to ensure that the output voltage stays within the specified tolerance range.
## 3. Package and Pin Configuration
### 3.1 Package Type
The L78M05CDT - TR comes in a specific package type that offers several advantages. The package is designed to be compact, which is beneficial for space - constrained applications. It also provides good mechanical protection for the internal components of the regulator, safeguarding them from physical damage during handling and installation.
### 3.2 Pin Configuration
- **Input Pin**: This pin is connected to the input voltage source. The input voltage should be within the specified range for the proper operation of the regulator. It is important to ensure that the input voltage is higher than
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TO-263
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