Datasheet > LM317_11

LM317_11

更新时间： 2024-01-22 23:58:38

品牌	Logo	应用领域
安森美 - ONSEMI		稳压器
页数	文件大小	规格书
12页	172K
描述
1.5 A Adjustable Output, Positive Voltage Regulator

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数据手册

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LM317_11 数据手册

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.

http://onsemi.com

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.

D PAK−3

D2T SUFFIX

CASE 936

Features

Heatsink surface (shown as terminal 4 in

case outline drawing) is connected to Pin 2.

• 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

TO−220

T SUFFIX

CASE 221AB

• Available in Surface Mount D PAK−3, and Standard 3−Lead

Transistor Package

• Eliminates Stocking many Fixed Voltages

• Pb−Free Packages are Available

Pin 1. Adjust

2. V

out

3. V

Heatsink surface connected to Pin 2.

out

LM317

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 10 of this data sheet.

240

Adj

Adjust

C *

C **

0.1 mF

1.0 mF

DEVICE MARKING INFORMATION

See general marking information in the device marking

section on page 10 of this data sheet.

**ꢀC is required if regulator is located an appreciable distance from power supply filter.

**ꢀC is not needed for stability, however, it does improve transient response.

_{ꢀ +ꢀ 1.25ꢀVꢀ}ǒ_{1 )}Ǔ_{ꢀ )ꢀ I}

ꢀR

out

Adj

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

Adj

negligible in most applications.

Figure 1. Standard Application

Publication Order Number:

October, 2011 − Rev. 12

LM317/D

12 3 4 5 6 7...12

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