LM317MDT-TR
Adjustable linear voltage regulators, 1.2V to 37V, 3-pin DPAK
Manufacturer： ['stm', 'fairchild']
series introduction
# LM317MDT - TR Product Series Introduction
## 1. Overview
The LM317MDT - TR is a highly versatile and widely used adjustable voltage regulator product series. It belongs to the family of linear voltage regulators, which are essential components in various electronic circuits for providing a stable and adjustable output voltage. This series is designed to meet the diverse power - supply requirements of different electronic devices, from simple hobbyist projects to complex industrial applications.
## 2. Key Features
### 2.1 Adjustable Output Voltage
One of the most significant features of the LM317MDT - TR is its ability to provide an adjustable output voltage. The output voltage can be set anywhere between 1.2V and 37V, which makes it suitable for a wide range of applications. This adjustability is achieved through the use of two external resistors, allowing designers to fine - tune the output voltage according to their specific needs.
### 2.2 High Output Current
The series can deliver a relatively high output current of up to 1.5A. This makes it capable of powering a variety of loads, including microcontrollers, sensors, and small - to - medium - sized integrated circuits. The high - current capability ensures that the regulator can handle the power demands of different components in a circuit without significant voltage drops.
### 2.3 Low Dropout Voltage
The LM317MDT - TR has a low dropout voltage, which is the minimum voltage difference between the input and output voltages required for the regulator to maintain a stable output. A low dropout voltage is crucial, especially in battery - powered applications, as it helps to maximize the battery life by reducing the power dissipation across the regulator.
### 2.4 Thermal Overload Protection
To ensure the reliability and safety of the device, the LM317MDT - TR is equipped with thermal overload protection. In case the device temperature exceeds a certain threshold, the protection mechanism will automatically reduce the output current or shut down the regulator to prevent damage. This feature is particularly important in high - power applications where the regulator may generate a significant amount of heat.
### 2.5 Short - Circuit Protection
Another important safety feature is short - circuit protection. If the output of the regulator is accidentally short - circuited to ground or another low - impedance source, the regulator will limit the output current to a safe level, preventing damage to the device and other components in the circuit.
## 3. Package and Pin Configuration
### 3.1 Package Type
The LM317MDT - TR comes in a SOT - 223 package. This surface - mount package is compact in size, which is beneficial for printed circuit board (PCB) design, especially in applications where space is limited. The SOT - 223 package also offers good thermal performance, allowing the device to dissipate heat effectively.
### 3.2 Pin Configuration
- **Input Pin (Pin 1)**: This pin is connected to the input voltage source. The input voltage should be higher than the desired output voltage by at least the dropout voltage of the regulator.
- **Adjust Pin (Pin 2)**: The adjust pin is used to set the output voltage. By connecting two external resistors between the output and the adjust pin, and between the adjust pin and ground, the output voltage can be adjusted according to the resistor values.
- **Output Pin (Pin 3)**: This pin provides the regulated output voltage to the load.
## 4. Applications
### 4.1 Power Supplies
The LM317MDT - TR is commonly used in the design of adjustable power supplies. It can be used to convert a fixed - voltage input, such as a battery or a wall adapter output, into a variable output voltage. This is useful in laboratory
Images for reference
TO-263
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