LM317

更新时间： 2024-01-05 20:40:59

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	125K
描述
1.5 A Adjustable Output, Positive Voltage Regulator

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LM317 技术参数

生命周期：	Contact Manufacturer	包装说明：	,
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LM317 数据手册

ON Semiconductort

LM317

1.5 A Adjustable Output,

Positive Voltage Regulator

THREE–TERMINAL

ADJUSTABLE 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.

SEMICONDUCTOR

TECHNICAL DATA

T SUFFIX

PLASTIC PACKAGE

CASE 221A

• Output Current in Excess of 1.5 A

• Output Adjustable between 1.2 V and 37 V

• Internal Thermal Overload Protection

Heatsink surface

• Internal Short Circuit Current Limiting Constant with Temperature

• Output Transistor Safe–Area Compensation

• Floating Operation for High Voltage Applications

connected to Pin 2.

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

Pin 1. Adjust

Package

2. V

3. V

out

• Eliminates Stocking many Fixed Voltages

Standard Application

D2T SUFFIX

PLASTIC PACKAGE

CASE 936

out

LM317

(D PAK)

240

Heatsink surface (shown as terminal 4 in

case outline drawing) is connected to Pin 2.

Adj

Adjust

C *

C **

0.1 µF

1.0 µF

ORDERING INFORMATION

Operating

Temperature Range

Device

LM317BD2T

LM317BT

LM317D2T

LM317T

Package

Surface Mount

Insertion Mount

Surface Mount

Insertion Mount

T = –40° to +125°C

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

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

T = 0° to +125°C

_{Ă +Ă 1.25ĂVĂ}ǒ_{1 )}Ǔ_{Ă )Ă I}

ĂR

out

Adj

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

Adj

negligible in most applications.

Semiconductor Components Industries, LLC, 2002

Publication Order Number:

January, 2002 – Rev. 3

LM317/D

12 3 4 5 6 7...12

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