LM317D2TG datasheet(1/12 Pages) ONSEMI

部件名	LM317D2TG

功能描述	1.5 A Adjustable Output, Positive Voltage Regulator

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制造商	ONSEMI [ON Semiconductor]

网页	http://www.onsemi.com

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August, 2006 − Rev. 9

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

• 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

• Eliminates Stocking many Fixed Voltages

• Pb−Free Packages are Available

Figure 1. Standard Application

**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.

Since IAdj is controlled to less than 100 mA, the error associated with this term is

negligible in most applications.

Vout + 1.25V 1 )

R

2

R

1

) I

Adj

R

2

LM317

Vin

Vout

R1

240

R2

Adjust

IAdj

Cin*

0.1

mF

+ C

O**

1.0

mF

TO−220

T SUFFIX

CASE 221AB

Pin 1. Adjust

2. Vout

3. Vin

D2PAK−3

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

类似零件编号 - LM317D2TG

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类似说明 - LM317D2TG

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