JIANGSU CHANGJIANG ELECTRONICS TECHNOLOGY CO., LTD
TO-251/TO-252-2L
Plastic-Encapsulate
Voltage Regulators
TO-251-3L/TO-252-2L
FEATURES
CJ7812
Three
-terminal positive voltage regulator
Maximum
output
current
I
OM
: 1.5 A
Output voltage
V
O
: 12 V
Continuous total dissipation
P
D
: 1.25 W
(T
a
= 25
℃
)
1.IN
2.GND
3.OUT
1
2
2
3
1
3
ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified)
Parameter
Input Voltage
Thermal
Resistance from Junction to Ambient
Operating Junction Temperature Range
Storage Temperature Range
Parameter
Output
Voltage
Symbol
Vo
Symbol
V
i
R
θJA
T
OPR
T
STG
Test conditions
25℃
Io= 5mA-1A,
14.5V≤ V
i
≤27V
Load Regulation
Line
Regulation
Quiescent Current
Quiescent Current Change
Output
Voltage Drift
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Output
Resistance
Short Circuit Current
Peak Current
*
Pulse test.
TYPICAL APPLICATION
∆Vo
∆Vo
Iq
∆Iq
△
Vo/
△
T
V
N
RR
V
d
R
O
Isc
Ipk
5.0mA≤ I
O
≤1.0A
14.5V
≤V
i
≤
30V
I
O
=5mA
f =10Hz to 100KHz
f =120Hz, 15V≤ V
i
≤25V
I
O
=1.0A
f = 1KHz
14.5V≤ Vi
≤30V
16V≤V
i
≤22V
I
O
=5mA -1.5A
I
O
=250mA - 750mA
-25-125℃
25℃
25℃
25℃
25℃
25℃
-25-125℃
-25-125℃
-25-125℃
25℃
-25-125℃
25℃
-25-125℃
25℃
25℃
55
-1
75
71
2
18
350
2.2
Value
35
80
-25~+125
-65~+150
Min
11.5
11.4
Typ
12.0
12.0
10
3
12
4
4.3
Max
12.5
12.6
240
120
240
120
8
0.5
1.0
Unit
V
℃/W
℃
℃
Unit
V
V
mV
mV
mV
mV
mA
mA
mA
mV/℃
μV/Vo
dB
V
mΩ
mA
A
ELECTRICALCHARACTERISTICS AT SPECIFIED VIRTUAL JINCTION TEMPERATURE
(Vi=19V, Io=500mA, Ci=0.33μF, Co=0.1μF, unless otherwise specified )
Vi
1
CJ7812
3
Vo
Ci
0.33μF
2
Co
0.1μF
Note: Bypass capacitors are recommended for optimum stability and transient response and should be located as close as
possible to the regulators.
www.cj-elec.com
1
E,Jun,2016
Typical Characteristics
Output Characteristics
16
14
Dropout Characteristics
I
O
=0mA
T
j
=25
℃
14
T
j
=25
℃
(V)
V
O
12
(V)
OUTPUT VOLTAGE V
O
12
OUTPUT VOLTAGE
8
10
O
I
=0
m
10
A
6
I
O
=250mA
、
500mA
、
750mA
、
1A
、
1.5A
4
8
2
0
0
5
10
15
20
25
30
35
6
9
10
11
12
13
14
15
16
17
INPUT VOLTAGE
V
IN
(V)
INPUT VOLTAGE
V
IN
(V)
Quiescent Current vs Input Voltage
6
15
Current Cut-off Grid Voltage
I
O
=0mA
V
IN
=19V
14
13
12
11
10
9
8
7
(mA)
5
T
j
=25
℃
(V)
T
j
=25
℃
Pulsed
I
Q
4
QUIESCENT CURRENT
3
2
1
0
0
5
10
15
20
25
30
35
OUTPUT VOLTAGE
V
O
6
0.0
0.5
1.0
1.5
2.0
2.5
INPUT VOLTAGE
V
IN
(V)
OUTPUT CURRENT
I
O
(A)
Output Voltage vs Junction Temperature
15
1.50
Power Derating Curve
V
in
=19V
14
I
O
=5mA
(W)
1.25
(V)
P
D
POWER DISSIPATION
0
25
50
75
100
125
13
1.00
OUTPUT VOLTAGE V
O
12
0.75
11
0.50
10
9
0.25
8
-25
0.00
-25
0
25
50
75
100
125
JUNCTION TEMPERATURE
T
J
(
℃
)
JUNCTION TEMPERATURE
T
J
(
℃
)
www.cj-elec.com
2
E,Jun,2016