LM3171 Datasheet PDF – Positive Voltage Regulator

Part Number : LM3171, Correct Part Number : LM317T

Function : 3-Terminal Positive Adjustable Regulator

Package : TO-220 Type

Manufacturers : ST,  Fairchild Semiconductor


LM3171 Voltage Regulator

Description :

This monolithic integrated circuit is an adjustable 3-terminal positive voltage regulator designed to supply 2.2A typical of load current with an output voltage adjustable over a 1.2 to 37V. It employs internal current limiting, thermal shutdown and safe area compensation.

Pinouts :

LM317T datasheet



Features for LM3171

1. Output-Current In Excess of 2.2 A
2. Output-Adjustable Between 1.2 V and 37 V
3.  Internal Thermal Overload Protection
4. Internal Short-Circuit Current Limiting
5. Output-Transistor Safe Operating Area Compensation


Ordering Information
LM317T Block Diagram

LM3171 Datasheet

LM317T pdf

Other data sheets within the file :  KA317, KA317TU, LM317


Official HomePage

1. https://www.fairchildsemi.com/products/power-management/voltage-regulators/positive-voltage-linear-regulators/LM317T.html

2. http://www.st.com/en/power-management/lm317.html

78M12A – NJM78M12FA, 12V, Voltage Regulator

This is one of the voltage regulator types.

Part Number : 78M12A, NJM78M12FA

Function : 12V Positive Voltage Regulator

Package : TO-220F, TO-252 Pin type

Manufacturers : JRC ( http://www.njr.com/ )

See the preview image and the PDF file for more information.


NJM78M00 12V positive regulator


The NJM78M00, 78M12A series of 3-Terminal Positive Voltage Regulators is constructed using the New JRC Planar epitaxial process. These regulators employ internal current-limiting, thermal-shutdown and safe-area compensation making them essentially indestructible. If adequate heat sinking is provided, they can deliver in excess of 500mA output current.


1. Internal Short Circuit Current Limit
2. Internal Thermal Overload Protection
3. Excellent Ripple Rejection
4. Guaranteed 500mA Output Current

78M12A Pinout

NJM78M00 pinout datasheet

NJM78M12A pdf

78M12A Datasheet