FAIRCHILD LM317 DATA SHEET
Summary
This advanced three-terminal adjustable regulator provides stable, positive voltage output across a wide range, offering reliable power management for demanding electronic applications. This technical guide details the unit's full capabilities, covering critical electrical specifications such as load regulation, line performance under extreme temperatures, and built-in protections like thermal overload protection. It is essential reading for electrical engineers and hardware designers who require precise component data to integrate high-current, adjustable voltage circuitry into their professional designs.
Page 1 Text Content
317 3-Term in al P sitive A ju stab le R eg lato
March 2000 Revised June 2005
LM317 3-Terminal Positive Adjustable Regulator General Description Features This monolithic integrated circuit is an adjustable 3-terminal ■Output Current In Excess of 1.5A positive voltage regulator designed to supply more than
■Output Adjustable Between 1.2V and 37V
1.5A of load current with an output voltage adjustable over
Internal Thermal Overload Protection
a 1.2 to 37V. It employs internal current limiting, thermal
Internal Short Circuit Current Limiting
shut-down and safe area compensation.
■Output Transistor Safe Operating Area Compensation ■TO-220 Package ■D2 PAK Package
Ordering Code: Product Number Package Operating Temperature LM317T TO-220 0q C to 125q C LM317D2TXM D2 PAK 0q C to 125q C
Connection Diagrams
Internal Block Diagram
© 2005 Fairchild Semiconductor Corporation DS400281 www.fairchildsemi.com
Page Summary Contents For FAIRCHILD LM317 DATA SHEET
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 5 |
| File Size | 592.50 KB |
| Published | May 19, 2026 |
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Frequently Asked Questions
What is the adjustable voltage range of this regulator?
The output voltage can be adjusted over a range between 1.2V and 37V.
Does the LM317 offer built-in protections?
Yes, it features internal thermal overload protection, current limiting, and short circuit shut-down capability.
Is external capacitance needed for proper operation?
Capacitance (C) is required only if the regulator is located an appreciable distance from the power supply filter, though it's not needed for stability.
What are the absolute maximum voltage limits?
The absolute maximum rating for the Input-Output Differential Voltage (V - V) is 40V.