Onsemi LM317 Adjustable Linear Voltage Regulator 500mA SOT-223-3
Onsemi LM317 adjustable linear voltage regulator with 500mA output and 1.2V to 37V range, in SOT-223-3 surface-mount package.
The Onsemi LM317 is an adjustable linear voltage regulator delivering up to 500mA across an output voltage range of 1.2V to 37V. This three-terminal positive regulator is supplied in a compact SOT-223-3 surface-mount package, suitable for modern PCB assembly.
Overview
The LM317 requires only two external resistors to set the desired output voltage, which simplifies circuit design and prototyping. Its built-in protection features include internal current limiting, thermal shutdown, and safe-area compensation for the output transistor, supporting stable operation under demanding conditions.
Key Features
- Adjustable output from 1.2V to 37V, set with two external resistors
- Up to 500mA output current
- Internal current limiting and thermal shutdown
- Safe-area compensation for the output transistor
- Floating operation design for use in high-voltage applications
- SOT-223-3 surface-mount package for efficient SMT assembly
- Lead-free (Pb-free) construction
Applications
This regulator is suited to a range of power management tasks, including local on-card voltage regulation for sensitive circuits. It can also form the basis of a simple adjustable switching regulator or a programmable output regulator. When configured with a fixed resistor, it can act as a precision current regulator for LED drivers or battery charging.
Physical Details
The package dimensions are 3.3 (width), 1.5 (depth) and 4.3 (height), with a product weight of 0.206 g. Its adjustable output and surface-mount package make it a practical option for designs that require a configurable regulated output.
- Local on-card voltage regulation for sensitive circuits
- Adjustable switching regulator basis
- Programmable output regulation
- Precision current regulator for LED drivers
- Regulator Type: Adjustable, positive, three-terminal linear
- Output Current: 500mA
- Output Voltage: Adjustable, 1.2V to 37V
- Package: SOT-223-3
- Mounting: Surface mount
- Special Feature: Internal current limiting, thermal shutdown and safe-area compensation
- Construction: Lead-free (Pb-free)
- Width: 3.3
- Depth: 1.5
- Height: 4.3
- Weight: 0.206 g
Documents
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