© Semiconductor Components Industries, LLC, 2004

August, 2004 − Rev. 12

1

Publication Order Number:

LM317M/D

LM317M

500 mA Adjustable Output,

Positive Voltage Regulator

The LM317M is an adjustable three−terminal positive voltage

regulator capable of supplying in excess of 500 mA 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 LM317M serves a wide variety of applications including local,

on−card regulation. This device also makes an especially simple

adjustable switching regulator, a programmable output regulator, or by

connecting a fixed resistor between the adjustment and output, the

LM317M can be used as a precision current regulator.

Features

Figure 1. Simplified Application

term is negligible in most applications.

LM317M

240

Adjust

*

0.1

mF

**

+ C

O

1.0

mF

Vout + 1.25 V 1 )

R2

R1

) IAdj R2

TO−220AB

T SUFFIX

CASE 221A

1

2

3

PIN ASSIGNMENT

1

2

Adjust

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 12 of this data sheet.

1

2

3

Heatsink Surface (shown as terminal 4 in

case outline drawing) is connected to Pin 2.

SOT−223

ST SUFFIX

CASE 318E

DPAK

DT SUFFIX

CASE 369C

Heatsink surface

connected to Pin 2

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1 2

3

4

See general marking information in the device marking

section on page 13 of this data sheet.

DEVICE MARKING INFORMATION

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