LM317

更新时间： 2024-01-26 20:46:39

品牌	Logo	应用领域
威世 - VISHAY		稳压器
页数	文件大小	规格书
6页	118K
描述
3-Terminal Adjustable Output Positive Voltage Regulators

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LM317 数据手册

LM317

New Product

Vishay

formerly General Semiconductor

3-Terminal Adjustable Output Positive Voltage Regulators

Pin Arrangement

Description

The LM317 is an adjustable 3-terminal positive voltage

regulator capable of supplying in excess of 1.5A over an

output voltage range of 1.2V to 37V. 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 compen-

sation, making it essentially blow-out proof.

TO-263

(LM317CM)

TO-220

(LM317CT)

1. Adjust

2. V_out

3. V_in

Features

Heatsink is connected to pin 2

• Output current in excess of 1.5 ampere

• Output adjustable between 1.2V and 37V

• Internal thermal overload protection

Standard Application

out

LM317

• Internal short-circuit current limiting

constant with temperature

240Ω

Adjust

ADJ

Cin

0.1µF

1µF

• Output transistor safe-area compensation

• Floating operation for high voltage applications

• Eliminates stocking many fixed voltages

Notes:

Cin is required if regulator is located an appreciable distance from power

supply filter.

Mechanical Data

Case: TO-220 and TO-263 packages

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

V_out= 1.25V (1 + R₂/R₁) + I_AdjR2

Weight: approx. 1.35g

Since I_Adjis controlled to less than 100µA, the error associated with this

term is negligible in most applications

Case outlines are on the back page.

Functional Block Diagram

Input

Voltage

Reference

Protection

Circuitry

Rlimit

Vadj

Output

Maximum Ratings Ratings at 25°C ambient temperature unless otherwise specified.

Parameter

Symbol

Value

Unit

Input-Output Voltage Differential

Junction-to-Case Thermal Resistance

V_i-V_o

Vdc

TO-220

TO-263

3.0

R_θJC

°C

Power Dissipation, 25°C Case Temperature

Operating Junction Temperature Range

Storage Junction Temperature Range

P_D

T_J

°C

0 to +125

–65 to +150

T_stg

Document Number 74809

30-Oct-02

www.vishay.com

12 3 4 5 6

中文翻译

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