LM7818ACT 查看數據表（PDF） - Fairchild Semiconductor

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LM7818ACT

3-Terminal 1 A Positive Voltage Regulator

Fairchild Semiconductor 

Block Diagram

Input

1

Starting

Circuit

Pin Assignment

Current

Generator

Reference

Voltage

Series Pass

Element

SOA

Protection

Error

Amplifier

Thermal

Protection

Figure 1.

Output

3

GND

2

TO-220

GND

1. Input

1

2. GND

3. Output

Figure 2.

Absolute Maximum Ratings

Absolute maximum ratings are those values beyond which damage to the device may occur. The datasheet

specifications should be met, without exception, to ensure that the system design is reliable over its power supply,

temperature, and output/input loading variables. Fairchild does not recommend operation outside datasheet

specifications.

Symbol

Parameter

Value

Unit

VI

RθJC

R θ JA

TOPR

TSTG

Input Voltage

VO = 5V to 18V

VO = 24V

Thermal Resistance Junction-Cases (TO-220)

Thermal Resistance Junction-Air (TO-220)

Operating Temperature

Range

LM78xx

LM78xxA

Storage Temperature Range

35

40

5

65

-40 to +125

0 to +125

-65 to +150

V

V

°C/W

°C/W

°C

°C

2

LM78XX/LM78XXA Rev. 1.0

www.fairchildsemi.com

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