Parameter

Symbol

Typ

Unit

Input Voltage

V

I

35

V

Output Voltage

V

O

18.0

V

Peak Current

I

PK

2.2

A

Operating Temperature

Range

T

OPR

0~125

Storage Temperature Range

T

STG

-65~150

LM7818

GENERAL DESCRIPTION

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Output Voltage

V

O

V

17.46

18.0

18.54

V

Line Regulation (Note1)

Regline

V

15

360

mV

V

5

180

Load Regulation (Note1)

Regload

I

15

360

mV

I

5

180

Quiescent Current

I

Q

T

5.2

8

mA

Ripple Rejection

RR

f = 120Hz, V

53

69

dB

Dropout Voltage

V

Drop

I

2

V

Output Resistance

r

O

f = 1KHz

0.022

Ω

Short Circuit Current

I

SC

V

250

mA

Peak Current

I

PK

T

2.2

A

3-Terminal 1A Positive Voltage Regulator

The LM7818 series of three terminal positive regulators are available in the TO-220 package and with

several fixed output voltages, making them useful in a wide range of applications. Each type employs

internal current limiting, thermal shut down and safe operating area protection, making it essentially

indestructible. If adequate heat sinking is provided, they can deliver over 1A output current. Although

designed primarily as fixed voltage regulators, these devices can be used with external components to

obtain adjustable voltages and currents.

Product specification

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(Refer to test circuit, Io = 500mA, Vi = 27V, Ci= 0.33uF, Co=0.1uF unless otherwise specified)

( Ta = 25 C)

O

( Ta = 25 C)

O

TO-220

TIGER ELECTRONIC CO.,LTD