TIGER ELECTRONIC CO.,LTD
Product specification
3-Terminal 1A Positive Voltage Regulator
GENERAL DESCRIPTION
LM7812J
The LM7812 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.
ABSOLUTE MAXIMUM RATINGS ( Ta = 25 C)
O
Parameter
Input Voltage
Output Voltage
Peak Current
Operating Temperature
Range
Storage Temperature Rang
e
Symbol
V
I
V
O
I
PK
T
OPR
T
STG
Typ
35
12.0
2.2
0~125
-65~150
Unit
V
V
A
o
C
o
TO-252
C
ELECTRICAL CHARACTERISTICS ( Ta = 25 C)
O
(Refer to test circuit, Io = 500mA, Vi = 19V, Ci= 0.33uF, Co=0.1uF unless otherwise specified)
Parameter
Output Voltage
Line Regulation (Note1)
Symbol
V
O
Regline
Test Conditions
V
I
= 14.5V to 30V
V
I
= 14.5V to 30V
V
I
= 16V to 22V
Load Regulation (Note1)
Quiescent Current
Ripple Rejection
Dropout Voltage
Output Resistance
Short Circuit Current
Peak Current
Regload
I
Q
RR
V
Drop
r
O
I
SC
I
PK
I
O
= 5.0mA to1.5A
I
O
=250mA to 750mA
T
J
=+25
o
C
f = 120Hz, V
O
= 15V to 30V
I
O
= 1A, T
J
=+25
o
C
f = 1KHz
V
I
= 35V, T
A
=+25
o
C
T
J
=+25
o
C
Min
11.64
—
—
—
—
—
56
—
—
—
—
Typ
12.0
10
3.0
11
5
5.1
73
2
0.018
230
2.2
Max
12.36
240
mV
120
240
120
8
—
—
—
—
—
mA
dB
V
Ω
mA
A
mV
Unit
V
TGS [ Tiger Electronic Co.,Ltd ]
