Datasheet > LM317/D

LM317/D

更新时间： 2024-01-29 00:40:03

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Three-Terminal Adjustable Output Positive Voltage Regulator

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LM317/D 技术参数

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LM317/D 数据手册

ON Semiconductort

LM317

Three-Terminal 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.

SEMICONDUCTOR

TECHNICAL DATA

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.

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

connected to Pin 2.

• Internal Short Circuit Current Limiting Constant with Temperature

• Output Transistor Safe–Area Compensation

• Floating Operation for High Voltage Applications

Pin 1. Adjust

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

2. V

3. V

out

Package

• Eliminates Stocking many Fixed Voltages

D2T SUFFIX

PLASTIC PACKAGE

CASE 936

Standard Application

(D PAK)

out

LM317

Heatsink surface (shown as terminal 4 in

case outline drawing) is connected to Pin 2.

240

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.

T = 0° to +125°C

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

_{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, 2001

Publication Order Number:

March, 2001 – Rev. 2

LM317/D

12 3 4 5 6 7...12

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