LM317T Datasheet PDF Download, ON Semiconductor





(PDF) LM317T Datasheet Download

Part Number LM317T
Description Positive Voltage Regulator
Manufacture ON Semiconductor
Total Page 12 Pages
PDF Download Download LM317T Datasheet PDF

Features: LM317, NCV317 1.5 A Adjustable Output, Positive Voltage Regulator The LM317 i s an adjustable 3−terminal positive v oltage regulator capable of supplying i n excess of 1.5 A over an output voltag e range of 1.2 V to 37 V. This voltage regulator is exceptionally easy to use and requires only two external resistor s to set the output voltage. Further, i t employs internal current limiting, th ermal shutdown and safe area compensati on, making it essentially blow−out pr oof. The LM317 serves a wide variety of applications including local, on card regulation. This device can also be use d to make a programmable output regulat or, or by connecting a fixed resistor b etween the adjustment and output, the L M317 can be used as a precision current regulator. Features • Output Curren t in Excess of 1.5 A • Output Adjusta ble between 1.2 V and 37 V • Internal Thermal Overload Protection • Intern al Short Circuit Current Limiting Const ant with Temperature • Output Transistor Safe−Area Compensation • Floating .

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LM317, NCV317
1.5 A Adjustable Output,
Positive Voltage Regulator
The LM317 is an adjustable 3terminal positive voltage regulator
capable of supplying in excess of 1.5 A over an output voltage range of
1.2 V to 37 V. This voltage regulator is exceptionally easy to use and
requires only two external resistors to set the output voltage. Further, it
employs internal current limiting, thermal shutdown and safe area
compensation, making it essentially blowout proof.
The LM317 serves a wide variety of applications including local, on
card regulation. This device can also be used to make a programmable
output regulator, or by connecting a fixed resistor between the
adjustment and output, the LM317 can be used as a precision current
regulator.
Features
Output Current in Excess of 1.5 A
Output Adjustable between 1.2 V and 37 V
Internal Thermal Overload Protection
Internal Short Circuit Current Limiting Constant with Temperature
Output Transistor SafeArea Compensation
Floating Operation for High Voltage Applications
Eliminates Stocking many Fixed Voltages
Available in Surface Mount D2PAK3, and Standard 3Lead
Transistor Package
NCV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AECQ100
Qualified and PPAP Capable
These Devices are PbFree, Halogen Free/BFR Free and are RoHS
Compliant
Vin Vout
LM317
Cin*
0.1 mF
IAdj Adjust
R1
240
+ CO**
1.0 mF
R2
www.onsemi.com
12
3
D2PAK3
D2T SUFFIX
CASE 936
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
TO220
T SUFFIX
CASE 221AB
1
2
3
Pin 1. Adjust
2. Vout
3. Vin
Heatsink surface connected to Pin 2.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 10 of this data sheet.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 10 of this data sheet.
** Cin is required if regulator is located an appreciable distance from power supply filter.
** CO is not needed for stability, however, it does improve transient response.
ǒ ǓVout  +  1.25 V 
1
)
R2
R1
)  IAdj R2
Since IAdj is controlled to less than 100 mA, the error associated with this term is
negligible in most applications.
Figure 1. Standard Application
© Semiconductor Components Industries, LLC, 2016
February, 2019 Rev. 16
1
Publication Order Number:
LM317/D

                    
              






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