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

LM1084 Datasheet – 5A, Low Dropout Positive Regulator

Part Number : LM1084

Function : 5A Low Dropout Positive Regulator

Package : TO-220, TO-263 Type

Manufacturers : National Semiconductor ->Texas Instruments

Pinouts :

LM1084 datasheet


Description :

The LM1084 is a series of low dropout voltage positive regulators with a maximum dropout of 1.5V at 5A of load current. It has the same pin-out as National Semiconductor’s industry standard LM317. The LM1084 is available in an adjustable version, which can set the output voltage with only two external resistors. It is also available in three fixed voltages: 3.3V, 5.0V and 12.0V. The fixed versions intergrate the adjust resistors. The LM1084 circuit includes a zener trimmed bandgap reference, current limiting and thermal shutdown. The LM1084 series is available in TO-220 and TO-263 packages. Refer to the LM1085 for the 3A version, and the LM1086 for the 1.5A version.

LM1084 circuit


1. Available in 3.3V, 5.0V, 12V and Adjustable Versions
2. Current Limiting and Thermal Protection
3. Output Current 5A
4. Industrial Temperature Range −40°C to 125°C
5. Line Regulation 0.015% (typical)
6. Load Regulation 0.1% (typical)


1. Post Regulator for Switching DC/DC Conveter
2. High Efficiency Linear Regulators
3. Battery Charger

Acquired by Texas Instruments on September 23rd, 2011.

Other data sheets within the file : LM1084IS-12, LM1084IS-3.3, LM1084IS-5.0, LM1084IS-ADJ

LM1084 Datasheet PDF Download

LM1084 pdf