© Semiconductor Components Industries, LLC, 2005

August, 2005 − Rev. 8

1

Publication Order Number:

LM317/D

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.

Features

Transistor Package

Figure 1. Standard Application

negligible in most applications.

Vout + 1.25 V 1 )

R

2

R

1

) I

Adj

R

2

LM317

240

Adjust

0.1

mF

+ C

1.0

mF

TO−220

T SUFFIX

CASE 221A

Pin 1. Adjust

D2T SUFFIX

CASE 936

Heatsink surface (shown as terminal 4 in

case outline drawing) is connected to Pin 2.

3

1

2

Heatsink surface connected to Pin 2.

3

1

2

http://onsemi.com

See detailed ordering and shipping information in the package

dimensions section on page 10 of this data sheet.

ORDERING INFORMATION

See general marking information in the device marking

section on page 10 of this data sheet.

DEVICE MARKING INFORMATION