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LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
September 2014
LM78XX / LM78XXA
3-Terminal 1 A Positive Voltage Regulator
Features
Output Current up to 1 A
Output Voltages: 5, 6, 8, 9, 10, 12, 15, 18, 24 V
Thermal Overload Protection
Short-Circuit Protection
Output Transistor Safe Operating Area Protection
Ordering Information
(1)
Note:
1. Above output voltage tolerance is available at 25 C.
Product Number
Output Voltage
Tolerance
Package
Operating
Temperature
Packing Method
LM7805CT
4%
TO-220
(Single Gauge)
-40
C to +125 C
Rail
LM7806CT
LM7808CT
LM7809CT
LM7810CT
LM7812CT
LM7815CT
LM7818CT
LM7824CT
LM7805ACT
2%
0
C to +125 C
LM7809ACT
LM7810ACT
LM7812ACT
LM7815ACT
Description
The LM78XX series of three-terminal positive regulators
is 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. If
adequate heat sinking is provided, they can deliver over
1 A output current. Although designed primarily as fixed-
voltage regulators, these devices can be used with exter-
nal components for adjustable voltages and currents.
1
1. Input
2. GND
3. Output
GND
TO-220
(Single Gauge)
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
2
Block Diagram
Figure 1. Block Diagram
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera-
ble above the recommended operating conditions and stressing the parts to these levels is not recommended. In addi-
tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. The
absolute maximum ratings are stress ratings only.
Values are at T
A
= 25 C unless otherwise noted.
Symbol
Parameter
Value
Unit
V
I
Input Voltage
V
O
= 5 V to 18 V
35
V
V
O
= 24 V
40
R
ΘJC
Thermal Resistance, Junction-Case (TO-220)
5
C/W
R
ΘJA
Thermal Resistance, Junction-Air
(TO-220)
65
C/W
T
OPR
Operating Temperature Range
LM78xx
-40 to +125
C
LM78xxA
0 to +125
T
STG
Storage Temperature Range
- 65 to +150
C
Starting
Circuit
Input
1
Reference
Voltage
Current
Generator
SOA
Protection
Thermal
Protection
Series Pass
Element
Error
Amplifier
Output
3
GND
2
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
3
Electrical Characteristics (LM7805)
Refer to the test circuit, -40 C < T
J
< 125 C, I
O
= 500 mA, V
I
= 10 V, C
I
= 0.1
μF, unless otherwise specified.
Notes:
2. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects
must be taken into account separately. Pulse testing with low duty is used.
3. These parameters, although guaranteed, are not 100% tested in production.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= +25
C
4.80
5.00
5.20
V
I
O
= 5 mA to 1 A, P
O
≤ 15 W,
V
I
= 7 V to 20 V
4.75
5.00
5.25
Regline
Line Regulation
(2)
T
J
= +25
C
V
I
= 7 V to 25 V
4.0
100.0
mV
V
I
= 8 V to 12 V
1.6
50.0
Regload
Load Regulation
(2)
T
J
= +25
C
I
O
= 5 mA to 1.5 A
9.0
100.0
mV
I
O
= 250 mA to 750 mA
4.0
50.0
I
Q
Quiescent Current
T
J
= +25
C
5
8
mA
ΔI
Q
Quiescent Current
Change
I
O
= 5 mA to 1 A
0.03
0.50
mA
V
I
= 7 V to 25 V
0.30
1.30
ΔV
O
/
ΔT
Output Voltage Drift
(3)
I
O
= 5 mA
-0.8
mV/
C
V
N
Output Noise Voltage
f = 10 Hz to 100 kHz, T
A
= +25
C
42
μV
RR
Ripple Rejection
(3)
f = 120 Hz, V
I
= 8 V to 18 V
62
73
dB
V
DROP
Dropout Voltage
T
J
= +25
C, I
O
= 1 A
2
V
R
O
Output Resistance
(3)
f = 1 kHz
15
m
Ω
I
SC
Short-Circuit Current
T
J
= +25
C, V
I
= 35 V
230
mA
I
PK
Peak Current
(3)
T
J
= +25
C
2.2
A
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
4
Electrical Characteristics (LM7806)
Refer to the test circuit, -40 C < T
J
< 125 C, I
O
= 500 mA, V
I
= 11 V, C
I
= 0.33
μF, C
O
= 0.1
μF, unless otherwise spec-
ified.
Notes:
4. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
5. These parameters, although guaranteed, are not 100% tested in production.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= +25
C
5.75
6.00
6.25
V
I
O
= 5 mA to 1 A, P
O
≤ 15 W,
V
I
= 8.0 V to 21 V
5.70
6.00
6.30
Regline
Line Regulation
(4)
T
J
= +25
C
V
I
= 8 V to 25 V
5.0
120.0
mV
V
I
= 9 V to 13 V
1.5
60.0
Regload
Load Regulation
(4)
T
J
= +25
C
I
O
= 5 mA to 1.5 A
9.0
120.0
mV
I
O
= 250 mA to 750 mA
3.0
60.0
I
Q
Quiescent Current
T
J
= +25
C
5
8
mA
ΔI
Q
Quiescent Current
Change
I
O
= 5 mA to 1 A
0.5
mA
V
I
= 8 V to 25 V
1.3
ΔV
O
/
ΔT
Output Voltage Drift
(5)
I
O
= 5 mA
-0.8
mV/
C
V
N
Output Noise Voltage
f = 10 Hz to 100 kHz, T
A
= +25
C
45
μV
RR
Ripple Rejection
(5)
f = 120 Hz, V
I
= 8 V to 18 V
62
73
dB
V
DROP
Dropout Voltage
T
J
= +25
C, I
O
= 1 A
2
V
R
O
Output Resistance
(5)
f = 1 kHz
19
m
Ω
I
SC
Short-Circuit Current
T
J
= +25
C, V
I
= 35 V
250
mA
I
PK
Peak Current
(5)
T
J
= +25
C
2.2
A
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
5
Electrical Characteristics (LM7808)
Refer to the test circuit, -40 C < T
J
< 125 C, I
O
= 500 mA, V
I
= 14 V, C
I
= 0.33
μF, C
O
= 0.1
μF, unless otherwise spec-
ified.
Notes:
6. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
7. These parameters, although guaranteed, are not 100% tested in production.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= +25
C
7.7
8.0
8.3
V
I
O
= 5 mA to 1 A, P
O
≤ 15 W,
V
I
= 10.5 V to 23 V
7.6
8.0
8.4
Regline
Line Regulation
(6)
T
J
= +25
C
V
I
= 10.5 V to 25 V
5
160
mV
V
I
= 11.5 V to 17 V
2
80
Regload
Load Regulation
(6)
T
J
= +25
C
I
O
= 5 mA to 1.5 A
10
160
mV
I
O
= 250 mA to 750 mA
5
80
I
Q
Quiescent Current
T
J
= +25
C
5
8
mA
ΔI
Q
Quiescent Current
Change
I
O
= 5 mA to 1 A
0.05
0.50
mA
V
I
= 10.5 V to 25 V
0.5
1.0
ΔV
O
/
ΔT
Output Voltage Drift
(7)
I
O
= 5 mA
-0.8
mV/
C
V
N
Output Noise Voltage
f = 10 Hz to 100 kHz, T
A
= +25
C
52
μV
RR
Ripple Rejection
(7)
f = 120 Hz, V
I
= 11.5 V to 21.5 V
56
73
dB
V
DROP
Dropout Voltage
I
O
= 1 A, T
J
= +25
C
2
V
R
O
Output Resistance
(7)
f = 1 kHz
17
m
Ω
I
SC
Short-Circuit Current
V
I
= 35 V, T
J
= +25
C
230
mA
I
PK
Peak Current
(7)
T
J
= +25
C
2.2
A
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
6
Electrical Characteristics (LM7809)
Refer to the test circuit, -40 C < T
J
< 125 C, I
O
= 500 mA, V
I
= 15 V, C
I
= 0.33
μF, C
O
= 0.1
μF, unless otherwise spec-
ified.
Notes:
8. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
9. These parameters, although guaranteed, are not 100% tested in production.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= +25
C
8.65
9.00
9.35
V
I
O
= 5 mA to 1 A, P
O
≤ 15 W,
V
I
= 11.5 V to 24 V
8.60
9.00
9.40
Regline
Line Regulation
(8)
T
J
= +25
C
V
I
= 11.5 V to 25 V
6
180
mV
V
I
= 12 V to 17 V
2
90
Regload
Load Regulation
(8)
T
J
= +25
C
I
O
= 5 mA to 1.5 A
12
180
mV
I
O
= 250 mA to 750 mA
4
90
I
Q
Quiescent Current
T
J
= +25
C
5
8
mA
ΔI
Q
Quiescent Current
Change
I
O
= 5 mA to 1 A
0.5
mA
V
I
= 11.5 V to 26 V
1.3
ΔV
O
/
ΔT
Output Voltage Drift
(9)
I
O
= 5 mA
-1
mV/
C
V
N
Output Noise Voltage
f = 10 Hz to 100 kHz, T
A
= +25
C
58
μV
RR
Ripple Rejection
(9)
f = 120 Hz, V
I
= 13 V to 23 V
56
71
dB
V
DROP
Dropout Voltage
I
O
= 1 A, T
J
= +25
C
2
V
R
O
Output Resistance
(9)
f = 1 kHz
17
m
Ω
I
SC
Short-Circuit Current
V
I
= 35 V, T
J
= +25
C
250
mA
I
PK
Peak Current
(9)
T
J
= +25
C
2.2
A
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
7
Electrical Characteristics (LM7810)
Refer to the test circuit, -40 C < T
J
< 125 C, I
O
= 500 mA, V
I
= 16 V, C
I
= 0.33
μF, C
O
= 0.1
μF, unless otherwise spec-
ified.
Notes:
10. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
11. These parameters, although guaranteed, are not 100% tested in production.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= +25
C
9.6
10.0
10.4
V
I
O
= 5 mA to 1 A, P
O
≤ 15 W,
V
I
= 12.5 V to 25 V
9.5
10.0
10.5
Regline
Line Regulation
(10)
T
J
= +25
C
V
I
= 12.5 V to 25 V
10
200
mV
V
I
= 13 V to 25 V
3
100
Regload
Load Regulation
(10)
T
J
= +25
C
I
O
= 5 mA to 1.5 A
12
200
mV
I
O
= 250 mA to 750 mA
4
400
I
Q
Quiescent Current
T
J
= +25
C
5.1
8.0
mA
ΔI
Q
Quiescent Current
Change
I
O
= 5 mA to 1 A
0.5
mA
V
I
= 12.5 V to 29 V
1.0
ΔV
O
/
ΔT
Output Voltage Drift
(11)
I
O
= 5 mA
-1
mV/
C
V
N
Output Noise Voltage
f = 10 Hz to 100 kHz, T
A
= +25
C
58
μV
RR
Ripple Rejection
(11)
f = 120 Hz, V
I
= 13 V to 23 V
56
71
dB
V
DROP
Dropout Voltage
I
O
= 1 A, T
J
= +25
C
2
V
R
O
Output Resistance
(11)
f = 1 kHz
17
m
Ω
I
SC
Short-Circuit Current
V
I
= 35 V, T
J
= +25
C
250
mA
I
PK
Peak Current
(11)
T
J
= +25
C
2.2
A
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
8
Electrical Characteristics (LM7812)
Refer to the test circuit, -40 C < T
J
< 125 C, I
O
= 500 mA, V
I
= 19 V, C
I
= 0.33
μF, C
O
= 0.1
μF, unless otherwise spec-
ified.
Notes:
12. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
13. These parameters, although guaranteed, are not 100% tested in production.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= +25
C
11.5
12.0
12.5
V
I
O
= 5 mA to 1 A, P
O
≤ 15 W,
V
I
= 14.5 V to 27 V
11.4
12.0
12.6
Regline
Line Regulation
(12)
T
J
= +25
C
V
I
= 14.5 V to 30 V
10
240
mV
V
I
= 16 V to 22 V
3
120
Regload
Load Regulation
(12)
T
J
= +25
C
I
O
= 5 mA to 1.5 A
11
240
mV
I
O
= 250 mA to 750 mA
5
120
I
Q
Quiescent Current
T
J
= +25
C
5.1
8.0
mA
ΔI
Q
Quiescent Current
Change
I
O
= 5 mA to 1 A
0.1
0.5
mA
V
I
= 14.5 V to 30 V
0.5
1.0
ΔV
O
/
ΔT
Output Voltage Drift
(13)
I
O
= 5 mA
-1
mV/
C
V
N
Output Noise Voltage
f = 10 Hz to 100 kHz, T
A
= +25
C
76
μV
RR
Ripple Rejection
(13)
f = 120 Hz, V
I
= 15 V to 25 V
55
71
dB
V
DROP
Dropout Voltage
I
O
= 1 A, T
J
= +25
C
2
V
R
O
Output Resistance
(13)
f = 1 kHz
18
m
Ω
I
SC
Short-Circuit Current
V
I
= 35 V, T
J
= +25
C
230
mA
I
PK
Peak Current
(13)
T
J
= +25
C
2.2
A
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
9
Electrical Characteristics (LM7815)
Refer to the test circuit, -40 C < T
J
< 125 C, I
O
= 500 mA, V
I
= 23 V, C
I
= 0.33
μF, C
O
= 0.1
μF, unless otherwise spec-
ified.
Notes:
14. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
15. These parameters, although guaranteed, are not 100% tested in production.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= +25
C
14.40
15.00
15.60
V
I
O
= 5 mA to 1 A, P
O
≤ 15 W,
V
I
= 17.5 V to 30 V
14.25
15.00
15.75
Regline
Line Regulation
(14)
T
J
= +25
C
V
I
= 17.5 V to 30 V
11
300
mV
V
I
= 20 V to 26 V
3
150
Regload
Load Regulation
(14)
T
J
= +25
C
I
O
= 5 mA to 1.5 A
12
300
mV
I
O
= 250 mA to 750 mA
4
150
I
Q
Quiescent Current
T
J
= +25
C
5.2
8.0
mA
ΔI
Q
Quiescent Current
Change
I
O
= 5 mA to 1 A
0.5
mA
V
I
= 17.5 V to 30 V
1.0
ΔV
O
/
ΔT
Output Voltage Drift
(15)
I
O
= 5 mA
-1
mV/
C
V
N
Output Noise Voltage
f = 10 Hz to 100 kHz, T
A
= +25
C
90
μV
RR
Ripple Rejection
(15)
f = 120 Hz, V
I
= 18.5 V to 28.5 V
54
70
dB
V
DROP
Dropout Voltage
I
O
= 1 A, T
J
= +25
C
2
V
R
O
Output Resistance
(15)
f = 1 kHz
19
m
Ω
I
SC
Short-Circuit Current
V
I
= 35 V, T
J
= +25
C
250
mA
I
PK
Peak Current
(15)
T
J
= +25
C
2.2
A
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
10
Electrical Characteristics (LM7818)
Refer to the test circuit, -40 C < T
J
< 125 C, I
O
= 500 mA, V
I
= 27 V, C
I
= 0.33
μF, C
O
= 0.1
μF, unless otherwise spec-
ified.
Notes:
16. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
17. These parameters, although guaranteed, are not 100% tested in production.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= +25
C
17.3
18.0
18.7
V
I
O
= 5 mA to 1 A, P
O
≤ 15 W,
V
I
= 21 V to 33 V
17.1
18.0
18.9
Regline
Line Regulation
(16)
T
J
= +25
C
V
I
= 21 V to 33 V
15
360
mV
V
I
= 24 V to 30 V
5
180
Regload
Load Regulation
(16)
T
J
= +25
C
I
O
= 5 mA to 1.5 A
15
360
mV
I
O
= 250 mA to 750 mA
5
180
I
Q
Quiescent Current
T
J
= +25
C
5.2
8.0
mA
ΔI
Q
Quiescent Current
Change
I
O
= 5 mA to 1 A
0.5
mA
V
I
= 21 V to 33 V
1.0
ΔV
O
/
ΔT
Output Voltage Drift
(17)
I
O
= 5 mA
-1
mV/
C
V
N
Output Noise Voltage
f = 10 Hz to 100 kHz, T
A
= +25
C
110
μV
RR
Ripple Rejection
(17)
f = 120 Hz, V
I
= 22 V to 32 V
53
69
dB
V
DROP
Dropout Voltage
I
O
= 1 A, T
J
= +25
C
2
V
R
O
Output Resistance
(17)
f = 1 kHz
22
m
Ω
I
SC
Short-Circuit Current
V
I
= 35 V, T
J
= +25
C
250
mA
I
PK
Peak Current
(17)
T
J
= +25
C
2.2
A
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
11
Electrical Characteristics (LM7824)
Refer to the test circuit, -40 C < T
J
< 125 C, I
O
= 500 mA, V
I
= 33 V, C
I
= 0.33
μF, C
O
= 0.1
μF, unless otherwise spec-
ified.
Notes:
18. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
19. These parameters, although guaranteed, are not 100% tested in production.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= +25
C
23.00
24.00
25.00
V
I
O
= 5 mA to 1 A, P
O
≤ 15 W,
V
I
= 27 V to 38 V
22.80
24.00
25.25
Regline
Line Regulation
(18)
T
J
= +25
C
V
I
= 27 V to 38 V
17
480
mV
V
I
= 30 V to 36 V
6
240
Regload
Load Regulation
(18)
T
J
= +25
C
I
O
= 5 mA to 1.5 A
15
480
mV
I
O
= 250 mA to 750 mA
5
240
I
Q
Quiescent Current
T
J
= +25
C
5.2
8.0
mA
ΔI
Q
Quiescent Current
Change
I
O
= 5 mA to 1 A
0.1
0.5
mA
V
I
= 27 V to 38 V
0.5
1.0
ΔV
O
/
ΔT
Output Voltage Drift
(19)
I
O
= 5 mA
-1.5
mV/
C
V
N
Output Noise Voltage
f = 10 Hz to 100 kHz, T
A
= +25
C
120
μV
RR
Ripple Rejection
(19)
f = 120 Hz, V
I
= 28 V to 38 V
50
67
dB
V
DROP
Dropout Voltage
I
O
= 1 A, T
J
= +25
C
2
V
R
O
Output Resistance
(19)
f = 1 kHz
28
m
Ω
I
SC
Short-Circuit Current
V
I
= 35 V, T
J
= +25
C
230
mA
I
PK
Peak Current
(19)
T
J
= +25
C
2.2
A
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
12
Electrical Characteristics (LM7805A)
Refer to the test circuit, 0 C < T
J
< 125 C, I
O
= 1 A, V
I
= 10 V, C
I
= 0.33
μF, C
O
= 0.1
μF, unless otherwise specified.
Notes:
20. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
21. These parameters, although guaranteed, are not 100% tested in production.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= +25
C
4.9
5.0
5.1
V
I
O
= 5 mA to 1 A, P
O
≤ 15 W,
V
I
= 7.5 V to 20 V
4.8
5.0
5.2
Regline
Line Regulation
(20)
V
I
= 7.5 V to 25 V, I
O
= 500 mA
5.0
50.0
mV
V
I
= 8 V to 12 V
3.0
50.0
T
J
= +25
C
V
I
= 7.3 V to 20 V
5.0
50.0
V
I
= 8 V to 12 V
1.5
25.0
Regload
Load Regulation
(20)
T
J
= +25
C, I
O
= 5 mA to 1.5 A
9
100
mV
I
O
= 5 mA to 1 A
9
100
I
O
= 250 mA to 750 mA
4
50
I
Q
Quiescent Current
T
J
= +25
C
5
6
mA
ΔI
Q
Quiescent Current
Change
I
O
= 5 mA to 1 A
0.5
mA
V
I
= 8 V to 25 V, I
O
= 500 mA
0.8
V
I
= 7.5 V to 20 V, T
J
= +25
C
0.8
ΔV
O
/
ΔT
Output Voltage Drift
(21)
I
O
= 5 mA
-0.8
mV/
C
V
N
Output Noise Voltage
f = 10 Hz to 100 kHz, T
A
= +25
C
42
μV
RR
Ripple Rejection
(21)
f = 120 Hz, V
O
= 500 mA,
V
I
=8 V to 18 V
68
dB
V
DROP
Dropout Voltage
I
O
= 1 A, T
J
= +25
C
2
V
R
O
Output Resistance
(21)
f = 1 kHz
17
m
Ω
I
SC
Short-Circuit Current
V
I
= 35 V, T
J
= +25
C
250
mA
I
PK
Peak Current
(21)
T
J
= +25
C
2.2
A
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
13
Electrical Characteristics (LM7809A)
Refer to the test circuit, 0 C < T
J
< 125 C, I
O
= 1 A, V
I
= 15 V, C
I
= 0.33
μF, C
O
= 0.1
μF, unless otherwise specified.
Notes:
22. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
23. These parameters, although guaranteed, are not 100% tested in production.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= +25
C
8.82
9.00
9.16
V
I
O
= 5 mA to 1 A, P
O
≤ 15 W,
V
I
= 11.2 V to 24 V
8.65
9.00
9.35
Regline
Line Regulation
(22)
V
I
= 11.7 V to 25 V, I
O
= 500 mA
6
90
mV
V
I
= 12.5 V to 19 V
4
45
T
J
= +25
C
V
I
= 11.5 V to 24 V
6
90
V
I
= 12.5 V to 19 V
2
45
Regload
Load Regulation
(22)
T
J
= +25
C, I
O
= 5 mA to 1.5 A
12
100
mV
I
O
= 5 mA to 1 A
12
100
I
O
= 250 mA to 750 mA
5
50
I
Q
Quiescent Current
T
J
= +25
C
5
6
mA
ΔI
Q
Quiescent Current
Change
I
O
= 5 mA to 1 A
0.5
mA
V
I
= 12 V to 25 V, I
O
= 500 mA
0.8
V
I
= 11.7 V to 25 V, T
J
= +25
C
0.8
ΔV
O
/
ΔT
Output Voltage Drift
(23)
I
O
= 5 mA
-1
mV/
C
V
N
Output Noise Voltage
f = 10 Hz to 100 kHz, T
A
= +25
C
58
μV
RR
Ripple Rejection
(23)
f = 120 Hz, V
O
= 500 mA,
V
I
=12 V to 22 V
62
dB
V
DROP
Dropout Voltage
I
O
= 1 A, T
J
= +25
C
2
V
R
O
Output Resistance
(23)
f = 1 kHz
17
m
Ω
I
SC
Short-Circuit Current
V
I
= 35 V, T
J
= +25
C
250
mA
I
PK
Peak Current
(23)
T
J
= +25
C
2.2
A
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
14
Electrical Characteristics (LM7810A)
Refer to the test circuit, 0 C < T
J
< 125 C, I
O
= 1 A, V
I
= 16 V, C
I
= 0.33
μF, C
O
= 0.1
μF, unless otherwise specified.
Notes:
24. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
25. These parameters, although guaranteed, are not 100% tested in production.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= +25
C
9.8
10.0
10.2
V
I
O
= 5 mA to 1 A, P
O
≤ 15 W,
V
I
= 12.8 V to 25 V
9.6
10.0
10.4
Regline
Line Regulation
(24)
V
I
= 12.8 V to 26 V, I
O
= 500 mA
8
100
mV
V
I
= 13 V to 20 V
4
50
T
J
= +25
C
V
I
= 12.5 V to 25 V
8
100
V
I
= 13 V to 20 V
3
50
Regload
Load Regulation
(24)
T
J
= +25
C, I
O
= 5 mA to 1.5 A
12
100
mV
I
O
= 5 mA to 1 A
12
100
I
O
= 250 mA to 750 mA
5
50
I
Q
Quiescent Current
T
J
= +25
C
5
6
mA
ΔI
Q
Quiescent Current
Change
I
O
= 5 mA to 1 A
0.5
mA
V
I
= 12.8 V to 25 V, I
O
= 500 mA
0.8
V
I
= 13 V to 26 V, T
J
= +25
C
0.5
ΔV
O
/
ΔT
Output Voltage Drift
(25)
I
O
= 5 mA
-1
mV/
C
V
N
Output Noise Voltage
f = 10 Hz to 100 kHz, T
A
= +25
C
58
μV
RR
Ripple Rejection
(25)
f = 120 Hz, V
O
= 500 mA,
V
I
=14 V to 24 V
62
dB
V
DROP
Dropout Voltage
I
O
= 1 A, T
J
= +25
C
2
V
R
O
Output Resistance
(25)
f = 1 kHz
17
m
Ω
I
SC
Short-Circuit Current
V
I
= 35 V, T
J
= +25
C
250
mA
I
PK
Peak Current
(25)
T
J
= +25
C
2.2
A
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
15
Electrical Characteristics (LM7812A)
Refer to the test circuit, 0 C < T
J
< 125 C, I
O
= 1 A, V
I
= 19 V, C
I
= 0.33
μF, C
O
= 0.1
μF, unless otherwise specified.
Notes:
26. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
27. These parameters, although guaranteed, are not 100% tested in production.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= +25
C
11.75
12.00
12.25
V
I
O
= 5 mA to 1 A, P
O
≤ 15 W,
V
I
= 14.8 V to 27 V
11.50
12.00
12.50
Regline
Line Regulation
(26)
V
I
= 14.8 V to 30 V, I
O
= 500 mA
10
120
mV
V
I
= 16 V to 22 V
4
120
T
J
= +25
C
V
I
= 14.5 V to 27 V
10
120
V
I
= 16 V to 22 V
3
60
Regload
Load Regulation
(26)
T
J
= +25
C, I
O
= 5 mA to 1.5 A
12
100
mV
I
O
= 5 mA to 1 A
12
100
I
O
= 250 mA to 750 mA
5
50
I
Q
Quiescent Current
T
J
= +25
C
5
6
mA
ΔI
Q
Quiescent Current
Change
I
O
= 5 mA to 1 A
0.5
mA
V
I
= 14 V to 27 V, I
O
= 500 mA
0.8
V
I
= 15 V to 30 V, T
J
= +25
C
0.8
ΔV
O
/
ΔT
Output Voltage Drift
(27)
I
O
= 5 mA
-1
mV/
C
V
N
Output Noise Voltage
f = 10 Hz to 100 kHz, T
A
= +25
C
76
μV
RR
Ripple Rejection
(27)
f = 120 Hz, V
O
= 500 mA,
V
I
=14 V to 24 V
60
dB
V
DROP
Dropout Voltage
I
O
= 1 A, T
J
= +25
C
2
V
R
O
Output Resistance
(27)
f = 1 kHz
18
m
Ω
I
SC
Short-Circuit Current
V
I
= 35 V, T
J
= +25
C
250
mA
I
PK
Peak Current
(27)
T
J
= +25
C
2.2
A
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
16
Electrical Characteristics (LM7815A)
Refer to the test circuit, 0 C < T
J
< 125 C, I
O
= 1 A, V
I
= 23 V, C
I
= 0.33
μF, C
O
= 0.1
μF, unless otherwise specified.
Notes:
28. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
29. These parameters, although guaranteed, are not 100% tested in production.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= +25
C
14.75
15.00
15.30
V
I
O
= 5 mA to 1 A, P
O
≤ 15 W,
V
I
= 17.7 V to 30 V
14.40
15.00
15.60
Regline
Line Regulation
(28)
V
I
= 17.4 V to 30 V, I
O
= 500 mA
10
150
mV
V
I
= 20 V to 26 V
5
150
T
J
= +25
C
V
I
= 17.5 V to 30 V
11
150
V
I
= 20 V to 26 V
3
75
Regload
Load Regulation
(28)
T
J
= +25
C, I
O
= 5 mA to 1.5 A
12
100
mV
I
O
= 5 mA to 1 A
12
100
I
O
= 250 mA to 750 mA
5
50
I
Q
Quiescent Current
T
J
= +25
C
5.2
6.0
mA
ΔI
Q
Quiescent Current
Change
I
O
= 5 mA to 1 A
0.5
mA
V
I
= 17.5 V to 30 V, I
O
= 500 mA
0.8
V
I
= 17.5 V to 30 V, T
J
= +25
C
0.8
ΔV
O
/
ΔT
Output Voltage Drift
(29)
I
O
= 5 mA
-1
mV/
C
V
N
Output Noise Voltage
f = 10 Hz to 100 kHz, T
A
= +25
C
90
μV
RR
Ripple Rejection
(29)
f = 120 Hz, V
O
= 500 mA,
V
I
=18.5 V to 28.5 V
58
dB
V
DROP
Dropout Voltage
I
O
= 1 A, T
J
= +25
C
2
V
R
O
Output Resistance
(29)
f = 1 kHz
19
m
Ω
I
SC
Short-Circuit Current
V
I
= 35 V, T
J
= +25
C
250
mA
I
PK
Peak Current
(29)
T
J
= +25
C
2.2
A
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
17
Typical Performance Characteristics
Figure 2. Quiescent Current
Figure 3. Peak Output Current
Figure 4. Output Voltage
Figure 5. Quiescent Current
6
5.75
5.5
5.25
5
4.75
4.5
V
I
= 10V
V
O
= 5V
I
O
= 5mA
-25
-50
0
25
50
75
100
125
QUIESCENT CURRENT (mA)
JUNCTION TEMPERATURE ( C)
0
3
2.5
2
1.5
1
.5
0
T
J
= 25
C
ΔV
O
= 100mV
5
10
15
20
25
30
35
OUTPUT CURRENT (A)
INPUT-OUTPUT DIFFERENTIAL (V)
1.02
1.01
1
0.99
0.98
V
I
- V
O
= 5V
I
O
= 5mA
-25
-50
0
25
50
75
100
125
NORMALIZED OUTPUT VOLTAGE (V)
JUNCTION TEMPERATURE ( C)
7
6.5
6
5.5
5
4.5
4
T
J
= 25
C
V
O
= 5V
I
O
= 10mA
10
5
15
20
25
30
35
QUIESCENT CURRENT (mA)
INPUT VOLTAGE (V)
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
18
Typical Applications
Figure 6. DC Parameters
Figure 7. Load Regulation
Figure 8. Ripple Rejection
0.1
μF
C
O
C
I
0.33
μF
Output
Input
LM78XX
1
3
2
LM78XX
3
2
1
0.33μF
270pF
100
Ω
30μS
R
L
2N6121
or EQ
Output
Input
V
O
0V
V
O
LM78XX
Output
Input
5.1
Ω
0.33μF
2
3
1
R
L
470μF
120Hz
+
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
19
Typical Applications
(Continued)
Figure 9. Fixed-Output Regulator
Figure 10. Constant Current Regulator
Notes:
29. To specify an output voltage, substitute voltage value for XX. A common ground is required between the input and
the output voltage. The input voltage must remain typically 2.0 V above the output voltage even during the low point
on the input ripple voltage.
30. C
I
is required if regulator is located an appreciable distance from power supply filter.
31. C
O
improves stability and transient response.
Figure 11. Circuit for Increasing Output Voltage
0.1
μF
C
O
C
I
0.33
μF
Output
Input
LM78XX
1
3
2
0.1
μF
C
O
C
I
0.33
μF
Output
Input
LM78XX
1
3
2
V
XX
R
1
R
L
I
Q
I
O
I
O
=
R
1
+ I
Q
V
XX
0.1
μF
C
O
C
I
0.33
μF
Output
Input
LM78XX
1
3
2
V
XX
R1
R2
I
Q
I
RI
≥ 5 I
Q
V
O
= V
XX
(1
+
R
2
/
R
1
)
+
I
Q
R
2
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
20
Typical Applications
(Continued)
Figure 12. Adjustable Output Regulator (7 V to 30 V)
Figure 13. High-Current Voltage Regulator
Figure 14. High Output Current with Short-Circuit Protection
LM741
-
+
2
3
6
4
2
3
1
0.33
μF
C
I
Input
Output
0.1
μF
C
O
LM7805
10kΩ
I
RI
≥ 5 I
Q
V
O
= V
XX
(1
+
R
2
/
R
1
)
+
I
Q
R
2
3
2
1
LM78XX
Output
Input
R1
3
Ω
0.33μF
IREG
0.1μF
I
O
IQ1
I
O
= I
REG
+ B
Q1
(I
REG
-V
BEQ1
/R
1
)
Q1 BD536
R1 =
V
BEQ1
I
REG
-I
Q1
B
Q1
/
LM78XX
Output
0.1μF
0.33μF
R1
3
Ω
3
2
1
Q1
Input
Q2
Q1 = TIP42
Q2 = TIP42
R
SC
=
I
SC
V
BEQ2
R
SC
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
21
Typical Applications
(Continued)
Figure 15. Tracking Voltage Regulator
Figure 16. Split Power Supply ( 15 V - 1 A)
LM78XX
LM741
0.1μF
0.33μF
1
2
3
7
2
6
4
3
4.7k
Ω
4.7k
Ω
TIP42
COMMON
COMMON
V
O
-V
O
V
I
-V
IN
_
+
3
1
2
1
3
2
0.33μF
0.1μF
2.2μF
1μF +
+
1N4001
1N4001
+15V
-15V
+20V
-20V
LM7815
MC7915
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
22
Typical Applications
(Continued)
Figure 17. Negative Output Voltage Circuit
Figure 18. Switching Regulator
LM78XX
Output
Input
+
1
2
0.1μF
3
LM78XX
1mH
3
1
2
2000μF
Output
Input
D45H11
0.33μF
470
Ω
4.7
Ω
10μF
0.5
Ω
Z1
+
+
LM78XX / LM78XXA
3-T
e
rminal
1 A Positive V
o
lt
age Regulator
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM78XX / LM78XXA Rev. 1.3.1
23
Physical Dimensions
Figure 19. TO-220, MOLDED, 3-LEAD, JEDEC VARIATION AB (ACTIVE)
Fairchild Semiconductor Corporation
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Rev. I71
