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SI7812

更新时间：2025-06-28 10:19:20
品牌：SECOS
描述：3-Terminal Positive Voltage Regulator

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免费 PCB/SMT

SI7812 概述

3-Terminal Positive Voltage Regulator 3端正电压稳压器

SI7812 数据手册

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SI78XX  
3-Terminal  
Elektronische Bauelemente  
Positive Voltage Regulator  
TO-251  
Description  
The SI78XX series of fixed-voltage monolithic intergrated-  
circuit voltage regulators designed for a wide range of  
applications. These applications include on-card regulation  
for elimination of noise and distribution problems associated  
with single-point regulation. Each of these regulators can  
deliver up to 1A of output current. The internal current limiting  
and thermal shutdown features of there trgulators make  
them essentially immune to overload.  
Features  
*5V,6V,8V,9V,10V,12V,15V,18V,24V Output Voltage Available  
*Output Transistor Safe-Area Compensation  
*No External Components  
*Internal Thermal Overload Protection  
*Internal Short-Circuit Current Limiting  
*High Power Dissipation Capability  
Millimeter  
Millimeter  
REF.  
REF.  
Min.  
Max.  
6.80  
5.50  
7.20  
7.80  
Min.  
Max.  
0.70  
2.40  
0.60  
0.60  
1.50  
5.80  
A
B
C
D
E
F
6.40  
5.20  
6.80  
7.20  
G
H
J
K
L
0.50  
2.20  
0.45  
0.45  
0.90  
5.40  
2.30 REF.  
0.60  
0.90  
M
Absolute Maximum Ratings  
Parameter  
Symbol  
Ratings  
Unit  
V
V
A
oC  
oC  
oC  
SI7805~18  
35  
40  
1
VIN  
Input Voltage  
SI7824  
VIN  
IO  
Output Current  
Tj,  
Tstg  
Operating Junction And Storage Temperature Range  
Thermal Resistance Junction-Air  
-55~+150  
125  
RθJA  
RθJC  
Thermal Resistance Junction-Cases  
12.5  
Electrical Characteristics  
SI7805 (Refer to the test circuits,Tj=0~125oC, I  
O
=500mA, VIN=10V, CIN=0.33uF, C =0.1uF unless otherwise specified)  
O
Symbol  
Test Condition  
Min.  
Typ.  
Unit  
Max.  
o
4.85  
A-Rank  
B-Rank  
(3%)  
(5%)  
C
5.15  
5
_
V
IN=10V,I  
O
=500mA,Tj=25  
VO  
V
≤
≤
20V,  
≤ I  
O
7.5V VIN  
≤
5mA  
≤ 1A,PD  
15W  
4.75  
_
5.25  
50  
25  
100  
50  
8
0.5  
1.3  
_
o
≤
≤
25V,I  
C
3
1
_
O
=500mA, Tj=25  
,
12V,I =500mA  
V
O
VIN  
7V  
8V  
mV  
o
_
Regulation)  
(Line  
≤
≤
C
VIN  
O
o
_
_
≤
≤
VIN=10V,  
I
≤
O
5mA  
250mA  
C
V
O
1A,  
≤
mV  
mA  
mA  
o
C
_
Regulation)  
(Load  
VIN=10V,  
IO  
750mA,  
o
_
_
_
_
_
_
_
C
VIN=10V,I  
O
=500mA,Tj=25  
IQ  
≤
≤
VIN=10V,  
IO  
5mA  
1A  
IQ  
≤
≤
25V,I  
O
=500mA  
V
f
IN  
7V  
10Hz  
o
≤
≤
40  
80  
uA  
dB  
VN  
C
100Hz,  
_
_
_
_
o
C
≤
≤
18V,f=120Hz,  
RR  
VIN  
8V  
o
C
_
_
_
_
Tj=25  
Io=1A,  
2
V
VD  
o
C
mA  
mA  
mV/oC  
ISC  
250  
1.8  
-0.6  
V
Tj=25  
IN=35V,  
o
_
_
IPK  
C
o
o
C
≤
VO/ Tj  
≤
=5mA,0 C Tj  
25  
IO  
http://www.SeCoSGmbH.com/  
Any changing of specification will not be informed individual  
01-Jun-2002 Rev. A  
Page 1 of 6  
SI78XX  
3-Terminal  
Elektronische Bauelemente  
Positive Voltage Regulator  
SI7806 (Refer to the test circuits,Tj=0~125oC, I  
O
=500mA, VIN=11V, CIN=0.33uF, C =0.1uF unless otherwise specified)  
O
Symbol  
Test Condition  
Min.  
Typ.  
Unit  
Max.  
o
5.82  
A-Rank  
B-Rank  
(3%)  
(5%)  
C
6.18  
6
V
8V  
IN=11V,I =500mA,Tj=25  
O
VO  
V
_
≤
≤
≤
I
21V,  
O
V
IN  
5mA  
≤
1A,PD  
15W  
≤
≤
≤
5.7  
_
6.3  
60  
25  
100  
50  
8
0.5  
1.3  
_
o
≤
IN  
≤
C
3
1
_
25V,I  
O
=500mA, Tj=25  
V
O
V
8V  
9V  
mV  
o
_
Regulation)  
(Line  
C
VIN  
,
13V,I  
O
=500mA  
o
C
_
_
≤
≤
VIN=11V,  
IO  
5mA  
V
O
1A,  
mV  
mA  
mA  
o
C
_
Regulation)  
(Load  
≤
VIN=11V,  
IO  
250mA  
≤
750mA,  
o
_
_
_
_
_
_
_
C
VIN=11V,I  
O=500mA,Tj=25  
IQ  
≤
≤
VIN=11V,  
I
O
O
5mA  
1A  
IQ  
≤
≤
25V,I  
=500mA  
V
IN  
8V  
10Hz  
o
≤
≤
≤
45  
75  
uA  
dB  
VN  
C
f
100Hz,  
_
_
_
_
o
C
≤
19V,f=120Hz,  
RR  
VIN  
9V  
=1A,  
o
_
_
_
_
C
2
Tj=25  
V
I
o
VD  
o
mA  
mA  
mV/oC  
ISC  
250  
1.8  
-0.7  
C
V
Tj=25  
IN=35V,  
o
C
_
_
IPK  
o
o
≤
≤
VO/ Tj  
IO  
=5mA,0 C Tj  
C
25  
SI7808 (Refer to the test circuits,Tj=0~125oC, I  
O
=500mA, VIN=14V, CIN=0.33uF, C =0.1uF unless otherwise specified)  
O
Symbol  
Test Condition  
Min.  
Typ.  
Unit  
Max.  
o
7.76  
A-Rank  
B-Rank  
(3%)  
(5%)  
C
8.24  
8
_
V
IN=14V,I =500mA,Tj=25  
O
VO  
V
≤
≤
15W  
C
IN ≤ 23V,  
IO  
≤
1A,PD  
10.5V V  
5mA  
≤
7.6  
_
8.4  
80  
40  
100  
50  
8
0.5  
1.3  
_
o
≤
≤
V
3
1
_
25V,I =500mA, Tj=25  
O
V
O
V
IN  
IN  
10.5V  
11V  
mV  
o
_
Regulation)  
(Line  
≤
C
≤
,
17V,I  
O
=500mA  
o
C
_
_
≤
VIN=14V,  
≤ I  
250mA  
O
5mA  
V
O
1A,  
≤
mV  
mA  
mA  
o
C
_
Regulation)  
≤
IO  
(Load  
VIN=14V,  
750mA,  
o
_
_
_
_
_
_
_
C
VIN=14V,I  
O=500mA,Tj=25  
IQ  
≤
≤
O
VIN=14V,  
I
5mA  
1A  
IQ  
≤
≤
≤
≤
f
25V,I  
O
=500mA  
VIN  
10.5V  
10Hz  
o
58  
72  
uA  
dB  
VN  
C
100Hz,  
_
_
_
_
o
≤
≤
21.5V,f=120Hz,  
C
RR  
VIN  
11.5V  
o
_
_
_
_
C
2
Tj=25  
I =1A,  
V
o
VD  
o
mA  
mA  
mV/oC  
ISC  
250  
1.8  
-0.9  
C
V
Tj=25  
IN=35V,  
o
_
_
IPK  
C
o
o
C
≤
VO/ Tj  
≤
=5mA,0 C Tj  
25  
IO  
http://www.SeCoSGmbH.com/  
Any changing of specification will not be informed individual  
01-Jun-2002 Rev. A  
Page 2 of 6  
SI78XX  
3-Terminal  
Elektronische Bauelemente  
Positive Voltage Regulator  
SI7809 (Refer to the test circuits,Tj=0~125oC, I  
O
=500mA, VIN=15V, CIN=0.33uF, C =0.1uF unless otherwise specified)  
O
Symbol  
Test Condition  
Min.  
Typ.  
Unit  
Max.  
o
8.73  
A-Rank  
B-Rank  
(3%)  
(5%)  
C
9.27  
9
_
V
11.5V  
IN=15V,I =500mA,Tj=25  
O
VO  
V
≤
≤
≤
≤
24V, I  
O
VIN  
5mA ≤  
1A,PD  
15W  
8.55  
_
9.45  
90  
45  
100  
50  
8
0.5  
1.3  
_
o
≤
≤
C
5
3
_
25V,I  
O
=500mA, Tj=25  
V
O
VIN  
11.5V  
13V  
mV  
o
_
Regulation)  
≤
(Line  
≤
C
VIN  
,
19V,I  
O
=500mA  
o
C
_
_
≤
VIN=15V,  
I
≤
O
≤
1A,  
O
5mA  
V
O
mV  
mA  
mA  
o
C
_
Regulation)  
(Load  
VIN=15V,  
≤
I
750mA,  
250mA  
o
_
_
_
_
_
_
_
C
VIN=15V,I  
O=500mA,Tj=25  
IQ  
≤
≤
I
26V,I  
VIN=15V,  
O
5mA  
1A  
IQ  
≤
≤
O
=500mA  
VIN  
11.5V  
10Hz  
o
≤
58  
72  
uA  
dB  
VN  
≤
C
f
100Hz,  
_
_
_
_
o
C
≤
≤
22.5V,f=120Hz,  
RR  
VIN  
12.5V  
Tj=25  
Io=1A,  
o
_
_
_
_
C
2
V
VD  
o
C
mA  
mA  
mV/oC  
ISC  
250  
1.8  
-1.1  
V
Tj=25  
IN=35V,  
o
_
_
IPK  
C
o
IO  
=5mA,0oC Tj  
C
≤
≤
VO/ Tj  
25  
SI7810 (Refer to the test circuits,Tj=0~125oC, I  
O
=500mA, VIN=16V, CIN=0.33uF, C =0.1uF unless otherwise specified)  
O
Symbol  
Test Condition  
Min.  
Typ.  
Unit  
Max.  
o
9.7  
A-Rank  
B-Rank  
(3%)  
(5%)  
C
10.3  
10  
_
V
12.5V  
IN=16V,I =500mA,Tj=25  
O
VO  
V
≤
15W  
≤
25V,  
I
O
V
≤
≤
IN  
≤
5mA  
1A,PD  
≤
≤
9.5  
_
10.5  
100  
50  
100  
50  
o
_
_
≤
≤
C
25V,I  
O
=500mA, Tj=25  
V
O
VIN  
13V  
14V  
mV  
o
_
Regulation)  
(Line  
C
V
IN  
,
20V,I  
O
=500mA  
_
_
o
C
_
_
≤
VIN=16V,  
I
≤
O
≤
5mA  
V
O
1A,  
≤
mV  
mA  
mA  
o
Regulation)  
(Load  
VIN=16V,  
IO  
250mA  
C
750mA,  
o
_
_
_
_
_
_
_
C
VIN=16V,I  
O=500mA,Tj=25  
8
0.5  
IQ  
≤
≤
IO  
1A  
VIN=16V,  
5mA  
IQ  
1
_
≤
≤
f
≤
25V,I  
O
=500mA  
V
≤
IN  
12.5V  
10Hz  
o
58  
72  
uA  
dB  
VN  
C
100Hz,  
_
_
_
_
o
C
≤
IN ≤ 23V,f=120Hz,  
V
RR  
13V  
=1A,  
o
_
_
_
_
C
o
C
Tj=25  
I
o
2
V
VD  
mA  
mA  
mV/oC  
ISC  
250  
1.8  
-1.1  
V
Tj=25  
IN=35V,  
o
_
_
IPK  
C
o
o
C
≤
VO/ Tj  
≤
=5mA,0 C Tj  
25  
IO  
http://www.SeCoSGmbH.com/  
Any changing of specification will not be informed individual  
01-Jun-2002 Rev. A  
Page 3 of 6  
SI78XX  
3-Terminal  
Elektronische Bauelemente  
Positive Voltage Regulator  
SI7812 (Refer to the test circuits,Tj=0~125oC, I  
O
=500mA, VIN=19V, CIN=0.33uF, C =0.1uF unless otherwise specified)  
O
Symbol  
Test Condition  
Min.  
Typ.  
Unit  
Max.  
o
11.64  
A-Rank  
B-Rank  
(3%)  
(5%)  
C
12.36  
12  
_
V
14.5V  
IN=19V,I  
O
=500mA,Tj=25  
VO  
V
≤
≤
1A,PD  
27V,  
≤ I  
O
V
IN  
5mA  
≤
≤
15W  
11.4  
_
12.6  
120  
60  
100  
60  
8
0.5  
1.3  
_
o
≤
≤
C
10  
3
_
30V,I  
O
=500mA, Tj=25  
V
O
V
IN  
14.5V  
16V  
mV  
o
C
_
Regulation)  
(Line  
≤
≤
VIN  
,
22V,I  
O
=500mA  
o
_
_
≤
≤
VIN=19V,  
I
O
5mA  
250mA  
C
V
O
1A,  
≤
mV  
mA  
mA  
o
_
Regulation)  
(Load  
VIN=19V,  
≤ I  
O
C
750mA,  
o
_
_
_
_
_
_
_
C
VIN=19V,I  
O
=500mA,Tj=25  
IQ  
≤
≤
VIN=19V,  
IO  
5mA  
1A  
IQ  
≤
≤
30V,I  
O
=500mA  
V
IN  
14.5V  
10Hz  
o
≤
75  
72  
uA  
dB  
VN  
≤
C
f
100Hz,  
_
_
_
_
o
C
≤
≤
25V,f=120Hz,  
RR  
VIN  
15V  
=1A,  
o
C
_
_
_
_
Tj=25  
I
o
2
V
VD  
o
C
mA  
mA  
mV/oC  
ISC  
250  
1.8  
-1.5  
V
Tj=25  
IN=35V,  
o
_
_
IPK  
C
IO  
=5mA,0oC≤ Tj  
C
25  
o
≤
VO/ Tj  
SI7815 (Refer to the test circuits,Tj=0~125oC, I  
O
=500mA, VIN=23V, CIN=0.33uF, C =0.1uF unless otherwise specified)  
O
Symbol  
Test Condition  
Min.  
Typ.  
Unit  
Max.  
o
14.55  
A-Rank  
B-Rank  
(3%)  
(5%)  
C
15.45  
15  
_
V
IN=23V,I =500mA,Tj=25  
O
VO  
V
≤
≤
30V,  
IO  
≤
1A,PD  
15W  
17.5V VIN  
5mA  
≤
≤
14.25  
_
15.75  
150  
75  
150  
75  
8
0.5  
1.3  
_
o
_
≤
≤
C
=500mA, Tj=25  
o
=500mA  
30V,I  
O
V
O
VIN  
17.5V  
17.5V  
mV  
_
_
_
_
Regulation)  
(Line  
≤
≤
C
VIN  
,
30V,I  
O
o
C
_
_
≤
O
≤
I
VIN=23V,  
O
5mA  
V
O
1A,  
mV  
mA  
mA  
o
C
Regulation)  
≤
750mA,  
(Load  
≤
VIN=23V,  
I
250mA  
o
_
_
_
_
_
_
_
C
VIN=23V,I  
O=500mA,Tj=25  
IQ  
≤
≤
1A  
VIN=23V,  
I
O
5mA  
IQ  
≤
≤
30V,I  
O
=500mA  
VIN  
17.5V  
10Hz  
o
≤
90  
70  
uA  
dB  
≤
f
VN  
C
100Hz,  
_
_
_
_
o
C
≤
≤
28.5V,f=120Hz,  
RR  
V
IN  
18.5V  
Io=1A,  
o
_
_
_
_
C
Tj=25  
2
V
VD  
o
mA  
mA  
mV/oC  
ISC  
250  
1.8  
-1.8  
C
V
Tj=25  
IN=35V,  
o
_
_
IPK  
C
o
o
≤
≤
VO/ Tj  
IO  
=5mA,0 C Tj  
C
25  
http://www.SeCoSGmbH.com  
Any changing of specification will not be informed individual  
01-Jun-2002 Rev. A  
Page 4 of 6  
SI78XX  
3-Terminal  
Elektronische Bauelemente  
Positive Voltage Regulator  
SI7818 (Refer to the test circuits,Tj=0~125oC, I  
O
=500mA, VIN=27V, CIN=0.33uF, C =0.1uF unless otherwise specified)  
O
Symbol  
Test Condition  
Min.  
Typ.  
Unit  
Max.  
o
A-Rank  
B-Rank  
(3%)  
(5%)  
C
18  
_
V
21V  
IN=27V,I  
O
=500mA,Tj=25  
17.46  
18.54  
18.9  
VO  
V
≤
≤
I
≤
33V,  
O
VIN  
5mA  
≤
1A,PD  
≤ 15W  
C
17.1  
_
o
_
≤
V
O
VIN  
≤ 33V,I  
O
=500mA, Tj=25  
180  
90  
180  
90  
8
0.5  
1.3  
_
21V  
24V  
mV  
o
_
_
_
Regulation)  
(Line  
≤
C
≤
VIN  
,
30V,I  
O
=500mA  
o
_
_
≤
VIN=27V,  
IO  
≤
5mA  
250mA  
C
V
O
1A,  
mV  
mA  
mA  
o
C
_
Regulation)  
(Load  
≤
≤
VIN=27V,  
IO  
750mA,  
o
_
_
_
_
_
_
_
C
VIN=27V,I  
O
=500mA,Tj=25  
IQ  
≤
≤
VIN=27V,  
IO  
5mA  
1A  
IQ  
≤
≤
21V  
33V,I  
O
=500mA  
VIN  
o
110  
uA  
dB  
≤
≤
VN  
C
≤ f  
10Hz  
100Hz,  
_
_
_
_
o
C
≤
69  
2
250  
1.8  
-2.2  
32V,f=120Hz,  
RR  
VIN  
22V  
o
_
_
_
_
C
V
Tj=25  
VD  
I
o
=1A,  
o
mA  
mA  
mV/oC  
ISC  
C
V
Tj=25  
IN=35V,  
o
_
_
IPK  
C
o
o
≤
VO/ Tj  
≤
IO  
=5mA,0 C Tj  
C
25  
SI7824 (Refer to the test circuits,Tj=0~125oC, I  
O
=500mA, VIN=33V, CIN=0.33uF, C =0.1uF unless otherwise specified)  
O
Symbol  
Test Condition  
Min.  
Typ.  
Unit  
Max.  
o
A-Rank  
B-Rank  
(3%)  
(5%)  
C
24  
_
V
27V  
IN=33V,I  
O
=500mA,Tj=25  
23.28  
24.72  
25.2  
240  
VO  
V
≤
38V,  
IO  
≤
≤
1A,PD  
15W  
VIN  
5mA  
≤
≤
22.8  
_
o
_
≤
≤
C
≤ 38V,I  
≤
O
=500mA, Tj=25  
V
O
V
V
IN  
27V  
30V  
mV  
o
_
_
_
Regulation)  
(Line  
C
IN  
,
36V,I  
O
=500mA  
120  
240  
120  
8
0.5  
1.0  
_
o
C
_
_
≤
≤
VIN=33V,  
I
O
5mA  
250mA  
V
O
1A,  
≤
mV  
mA  
mA  
o
C
_
Regulation)  
(Load  
VIN=33V,  
≤I  
O
750mA,  
o
_
_
_
_
_
_
_
C
VIN=33V,I  
O
=500mA,Tj=25  
IQ  
≤
≤
VIN=33V,  
IO  
5mA  
1A  
IQ  
≤
≤
≤
≤
≤
≤
38V,I  
O
=500mA  
V
f
IN  
28V  
10Hz  
o
uA  
dB  
VN  
C
170  
100Hz,  
_
_
_
_
o
C
38V,f=120Hz,  
RR  
VIN  
66  
2
250  
1.8  
-2.8  
28V  
o
_
_
_
_
C
Tj=25  
I
o
=1A,  
V
VD  
o
mA  
mA  
mV/oC  
ISC  
C
V
Tj=25  
IN=35V,  
o
_
_
IPK  
C
o
o
VO/ Tj  
≤
IO  
=5mA,0 C Tj ≤  
C
25  
http://www.SeCoSGmbH.com/  
Any changing of specification will not be informed individual  
01-Jun-2002 Rev. A  
Page 5 of 6  
SI78XX  
3-Terminal  
Elektronische Bauelemente  
Positive Voltage Regulator  
Typical Application  
SI78XX  
Characteristics Curve  
http://www.SeCoSGmbH.com  
Any changing of specification will not be informed individual  
01-Jun-2002 Rev. A  
Page 6 of 6  

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