JIANGSU CHANGJIANG ELECTRONICS TECHNOLOGY CO., LTD
TO-220
Plastic-Encapsulate
Voltage Regulator
CJ7812
Three
-terminal positive voltage regulator
FEATURES
Maximum Output current
I
OM
: 1.5 A
Output voltage V
o
: 12 V
Continuous total dissipation
P
D
: 2 W (T
J
= 25
)
15 W (T
C
= 25
)
ABSOLUTE MAXIMUM RATINGS(Operating temperature range applies unless otherwise specified)
Parameter
Symbol
Value
Unit
Input Voltage
V
i
35
V
Thermal resistance junction-air
RJA
65
/W
Thermal resistance junction-cases
RJC
5
/W
Operating Junction Temperature Range
T
OPR
0-150
Storage Temperature Range
T
STG
-65-150
ELECTRICAL CHARACTERISTICS
(Vi=19V,Io=500mA,0
<T
J
<125
,Ci=0.33F,Co=0.1F, unless otherwise specified )
Parameter
Symbol
Test conditions
MIN
TYP
MAX
UNIT
T
J
=25 11.5
12.0
12.5
V
Output voltage
Vo
Io= 5.0mA-1.0A, P<15W
14.5V V
i
27V
11.4
12 12.6 V
T
J
=25, 14.5V Vi
30V
10
240 mV
Load Regulation
Vo
T
J
=25, 16VV
i
22V
3
120 mV
T
J
=25, I
O
=I5.0mA - 1.5A
11
240
mV
Line regulation
Vo
T
J
=25, I
O
=250mA - 750mA
5.0
120
mV
Quiescent Current
Iq
T
J
=25
5.1
8
mA
5.0mA I
O
1.0A
0.5
mA
Quiescent Current Change
Iq
14.5V V
i
30V
1.0
mA
Output voltage drift
Vo/T
I
O
=5mA
-1
mV/
Output Noise VoItage
V
N
f =10Hz to 100KHz,T
J
=25
76
V
Ripple Rejection
RR
f =120Hz, 15V V
i
25V
55 71
dB
Dropout Voltage
V
d
I
O
=1.0A,T
J
=25
2
V
Output resistance
R
O
f = 1KHz
18
m
Short Circuit Current
Isc
V
i
=35V, T
J
=25
230
mA
Peak Current
Ipk
T
J
=25
2.2
A
TYPICAL APPLICATION
1 2 3
TO-220
1.IN
2.GND
3.OUT
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