LM317 Adjustable Positive Voltage Regulator 1.2V to 37V 1.5A TO-220
The LM317 is a versatile three-terminal positive voltage regulator designed to provide an adjustable output voltage over a wide range. Unlike fixed-output regulators, the LM317 allows users to set the desired output voltage using only two external resistors, making it an ideal solution for applications that require flexible voltage regulation. The device is capable of delivering more than 1.5A of output current while maintaining excellent line and load regulation.
The LM317 incorporates several built-in protection features, including current limiting, thermal shutdown, and safe operating area protection, which improve system reliability and simplify circuit design. Its TO-220 package provides excellent heat dissipation, making it suitable for power supplies, battery charging circuits, current regulators, laboratory equipment, and industrial electronics.
Features
- Adjustable 3-terminal positive Voltage Regulator
- The output voltage can be set to range from 1.25V to 37V
- Output current is 1.5A
- Maximum Input to output voltage difference is 40V, recommended 15V
- Maximum output current when voltage difference is 15V is 2.2A
- The operating junction temperature is 125°C
- Available in To-220 Package
Specifications:
| Specification | Value |
|---|---|
| Part Number | LM317 |
| Regulator Type | Adjustable Positive Voltage Regulator |
| Package | TO-220 |
| Output Voltage Range | 1.2V to 37V |
| Reference Voltage | 1.25V |
| Maximum Output Current | 1.5A |
| Maximum Input-to-Output Differential Voltage | 40V |
| Adjustment Pin Current | 50µA |
| Operating Temperature | 0°C to +125°C |
| Mounting Type | Through Hole |
| Number of Pins | 3 |
Pinout:
| Pin Number | Pin Name | Description |
| 1 | Adjust | This pin adjusts the output voltage |
| 2 | Output Voltage (Vout) | The regulated output voltage set by the adjust pin can be obtained from this pin |
| 3 | Input Voltage (Vin) | The input voltage which has to be regulated is given to this pin |
Applications
- Used for Positive voltage regulations
- Variable power supply
- Current limiting circuits
- Reverse polarity circuits
- Commonly used in Desktop PC, DVD and other consumer products
- Used in motor control circuits
Package Contents:
- 1x LM317 Adjustable Positive Voltage Regulator 1.2V to 37V 1.5A TO-220.