Lm 217
LM317, NCV317 1.5 A Adjustable Output, Positive Voltage Regulator
The LM317 is an adjustable 3−terminal 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 blow−out 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.
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1
2 3
D2PAK−3 D2T SUFFIX CASE 936
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 Safe−Area Compensation Floating Operation for High Voltage Applications Available in Surface Mount D2PAK−3, and Standard 3−Lead Transistor Package NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable Eliminates Stocking many Fixed Voltages These are Pb−Free Devices
Vin LM317 R1 240 IAdj Cin* 0.1 mF R2 Adjust + C ** O 1.0 mF Vout
Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2.
TO−220 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
The LM317 is an adjustable 3−terminal 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 blow−out 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 http://onsemi.com
1
2 3
D2PAK−3 D2T SUFFIX CASE 936
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 Safe−Area Compensation Floating Operation for High Voltage Applications Available in Surface Mount D2PAK−3, and Standard 3−Lead Transistor Package NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable Eliminates Stocking many Fixed Voltages These are Pb−Free Devices
Vin LM317 R1 240 IAdj Cin* 0.1 mF R2 Adjust + C ** O 1.0 mF Vout
Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2.
TO−220 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