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LM78LXX Series 3-Terminal Positive Regulators
May 2003
LM78LXX Series
3-Terminal Positive Regulators
General Description
The LM78LXX series of three terminal positive regulators is
available with several fixed output voltages making them
useful in a wide range of applications. When used as a zener
diode/resistor combination replacement, the LM78LXX usu-
ally results in an effective output impedance improvement of
two orders of magnitude, and lower quiescent current. These
regulators can provide local on card regulation, eliminating
the distribution problems associated with single point regu-
lation. The voltages available allow the LM78LXX to be used
in logic systems, instrumentation, HiFi, and other solid state
electronic equipment.
The LM78LXX is available in the plastic TO-92 (Z) package,
the plastic SO-8 (M) package and a chip sized package
(8-Bump micro SMD) using National’s micro SMD package
technology. With adequate heat sinking the regulator can
deliver 100mA output current. Current limiting is included to
limit the peak output current to a safe value. Safe area
protection for the output transistors is provided to limit inter-
nal power dissipation. If internal power dissipation becomes
too high for the heat sinking provided, the thermal shutdown
circuit takes over preventing the IC from overheating.
Features
n LM78L05 in micro SMD package
n Output voltage tolerances of ± 5% over the temperature
range
n Output current of 100mA
n Internal thermal overload protection
n Output transistor safe area protection
n Internal short circuit current limit
n Available in plastic TO-92 and plastic SO-8 low profile
packages
n No external components
n Output voltages of 5.0V, 6.2V, 8.2V, 9.0V, 12V, 15V
n See AN-1112 for micro SMD considerations
Connection Diagrams
SO-8 Plastic (M)
(Narrow Body)
(TO-92)
Plastic Package (Z)
00774403
00774402
Top View
Bottom View
8-Bump micro SMD
micro SMD Marking Orientation
00774424
Top View
(Bump Side Down)
00774433
Top View
© 2003 National Semiconductor Corporation
DS007744
www.national.com
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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Power Dissipation (Note 5)
Operating Junction Temperature
SO-8, TO-92
0˚C to 125˚C
micro SMD
−40˚C to 85˚C
Internally Limited
Soldering Information
Infrared or Convection (20 sec.)
235˚C
Input Voltage
35V
Wave Soldering (10 sec.)
260˚C (lead time)
Storage Temperature
−65˚C to +150˚C
ESD Susceptibility (Note 2)
1kV
LM78LXX Electrical Characteristics Limits in standard typeface are for T J = 25˚C, Bold typeface
applies over 0˚C to 125˚C for SO-8 and TO-92 packages, and −40˚C to 85˚C for micro SMD package. Limits are guaran-
teed by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Unless other-
wise specified: I O = 40mA, C I = 0.33µF, C O = 0.1µF.
LM78L05
Unless otherwise specified, V IN = 10V
Symbol
Parameter
Conditions
Min Typ Max Units
V O
Output Voltage
4.8
5
5.2
7V
≤
V IN ≤
20V
1mA
≤
I O ≤
40mA
4.75
5.25
V
(Note 3)
1mA ≤ I O ≤ 70mA
(Note 3)
4.75
5.25
∆ V O
Line Regulation
7V ≤ V IN ≤ 20V
18
75
8V
≤
V IN
≤
20V
10
54
mV
∆
V O
Load Regulation
1mA
≤
I O ≤
100mA
20
60
1mA
≤
I O ≤
40mA
5
30
I Q
Quiescent Current
3
5
∆ I Q
Quiescent Current Change
8V ≤ V IN ≤ 20V
1.0
mA
1mA ≤ I O ≤ 40mA
0.1
V n
Output Noise Voltage
f = 10 Hz to 100 kHz
(Note 4)
40
µV
Ripple Rejection
f = 120 Hz
8V
47
62
dB
≤
V IN ≤
16V
I PK
Peak Output Current
140
mA
Average Output Voltage Tempco
I O = 5mA
−0.65
mV/˚C
V IN (Min)
Minimum Value of Input Voltage
Required to Maintain Line Regulation
6.7
7
V
θ JA
Thermal Resistance
(8-Bump micro SMD)
230.9
˚C/W
LM78L62AC
Unless otherwise specified, V IN = 12V
Symbol
Parameter
Conditions
Min Typ Max Units
V O
Output Voltage
5.95
6.2
6.45
8.5V
≤
V IN ≤
20V
1mA
≤
I O ≤
40mA
5.9
6.5
V
(Note 3)
1mA ≤ I O ≤ 70mA
(Note 3)
5.9
6.5
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LM78LXX Electrical Characteristics Limits in standard typeface are for T J = 25˚C, Bold typeface
applies over 0˚C to 125˚C for SO-8 and TO-92 packages, and −40˚C to 85˚C for micro SMD package. Limits are
guaranteed by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Unless
otherwise specified: I O = 40mA, C I = 0.33µF, C O = 0.1µF. (Continued)
LM78L62AC (Continued)
Unless otherwise specified, V IN = 12V
Symbol
Parameter
Conditions
Min Typ Max Units
∆
V O
Line Regulation
8.5V
≤
V IN ≤
20V
65
175
9V
≤
V IN ≤
20V
55
125
mV
∆
V O
Load Regulation
1mA
≤
I O ≤
100mA
13
80
1mA ≤ I O ≤ 40mA
6
40
I Q
Quiescent Current
2
5.5
∆
I Q
Quiescent Current Change
8V
≤
V IN ≤
20V
1.5
mA
1mA
≤
I O ≤
40mA
0.1
V n
Output Noise Voltage
f = 10 Hz to 100 kHz
(Note 4)
50
µV
Ripple Rejection
f = 120 Hz
10V
40
46
dB
≤
V IN ≤
20V
I PK
Peak Output Current
140
mA
Average Output Voltage Tempco
I O = 5mA
−0.75
mV/˚C
V IN (Min)
Minimum Value of Input Voltage
Required to Maintain Line Regulation
7.9
V
LM78L82AC
Unless otherwise specified, V IN = 14V
Symbol
Parameter
Conditions
Min Typ Max Units
V O
Output Voltage
7.87
8.2
8.53
11V ≤ V IN ≤ 23V
1mA ≤ I O ≤ 40mA
(Note 3)
7.8
8.6
V
1mA
≤
I O
≤
70mA
7.8
8.6
(Note 3)
∆
V O
Line Regulation
11V
≤
V IN ≤
23V
80
175
12V
≤
V IN ≤
23V
70
125
mV
∆
V O
Load Regulation
1mA
≤
I O ≤
100mA
15
80
1mA
≤
I O ≤
40mA
8
40
I Q
Quiescent Current
2
5.5
∆
I Q
Quiescent Current Change
12V
≤
V IN
≤
23V
1.5
mA
1mA
≤
I O ≤
40mA
0.1
V n
Output Noise Voltage
f = 10 Hz to 100 kHz
(Note 4)
60
µV
Ripple Rejection
f = 120 Hz
12V
39
45
dB
≤
V IN ≤
22V
I PK
Peak Output Current
140
mA
Average Output Voltage Tempco
I O = 5mA
−0.8
mV/˚C
V IN (Min)
Minimum Value of Input Voltage
Required to Maintain Line Regulation
9.9
V
3
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LM78LXX Electrical Characteristics Limits in standard typeface are for T J = 25˚C, Bold typeface
applies over 0˚C to 125˚C for SO-8 and TO-92 packages, and −40˚C to 85˚C for micro SMD package. Limits are
guaranteed by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Unless
otherwise specified: I O = 40mA, C I = 0.33µF, C O = 0.1µF. (Continued)
LM78L09AC
Unless otherwise specified, V IN = 15V
Symbol
Parameter
Conditions
Min Typ Max Units
V O
Output Voltage
8.64
9.0
9.36
11.5V ≤ V IN ≤ 24V
1mA ≤ I O ≤ 40mA
(Note 3)
8.55
9.45
V
1mA
≤
I O
≤
70mA
8.55
9.45
(Note 3)
∆
V O
Line Regulation
11.5V
≤
V IN
≤
24V
100
200
13V
≤
V IN ≤
24V
90
150
mV
∆
V O
Load Regulation
1mA
≤
I O ≤
100mA
20
90
1mA
≤
I O ≤
40mA
10
45
I Q
Quiescent Current
2
5.5
∆
I Q
Quiescent Current Change
11.5V
≤
V IN
≤
24V
1.5
mA
1mA
≤
I O ≤
40mA
0.1
V n
Output Noise Voltage
70
µV
Ripple Rejection
f = 120 Hz
15V
38
44
dB
≤
V IN ≤
25V
I PK
Peak Output Current
140
mA
Average Output Voltage Tempco
I O = 5mA
−0.9
mV/˚C
V IN (Min)
Minimum Value of Input Voltage
Required to Maintain Line Regulation
10.7
V
LM78L12AC
Unless otherwise specified, V IN = 19V
Symbol
Parameter
Conditions
Min Typ Max Units
V O
Output Voltage
11.5
12
12.5
14.5V ≤ V IN ≤ 27V
1mA ≤ I O ≤ 40mA
(Note 3)
11.4
12.6
V
1mA ≤ I O ≤ 70mA
(Note 3)
11.4
12.6
∆
V O
Line Regulation
14.5V
≤
V IN
≤
27V
30
180
16V
≤
V IN ≤
27V
20
110
mV
∆
V O
Load Regulation
1mA
≤
I O ≤
100mA
30
100
1mA
≤
I O ≤
40mA
10
50
I Q
Quiescent Current
3
5
∆ I Q
Quiescent Current Change
16V ≤ V IN ≤ 27V
1
mA
1mA
≤
I O
≤
40mA
0.1
V n
Output Noise Voltage
80
µV
Ripple Rejection
f = 120 Hz
15V
40
54
dB
≤
V IN ≤
25
I PK
Peak Output Current
140
mA
Average Output Voltage Tempco
I O = 5mA
−1.0
mV/˚C
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4
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LM78LXX Electrical Characteristics Limits in standard typeface are for T J = 25˚C, Bold typeface
applies over 0˚C to 125˚C for SO-8 and TO-92 packages, and −40˚C to 85˚C for micro SMD package. Limits are
guaranteed by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Unless
otherwise specified: I O = 40mA, C I = 0.33µF, C O = 0.1µF. (Continued)
LM78L12AC (Continued)
Unless otherwise specified, V IN = 19V
Symbol
Parameter
Conditions
Min Typ Max Units
V IN (Min)
Minimum Value of Input Voltage
Required to Maintain Line Regulation
13.7
14.5
V
LM78L15AC
Unless otherwise specified, V IN = 23V
Symbol
Parameter
Conditions
Min Typ Max Units
V O
Output Voltage
14.4
15.0
15.6
17.5V ≤ V IN ≤ 30V
1mA ≤ I O ≤ 40mA
(Note 3)
14.25
15.75
V
1mA ≤ I O ≤ 70mA
(Note 3)
14.25
15.75
∆
V O
Line Regulation
17.5V
≤
V IN
≤
30V
37
250
20V
≤
V IN ≤
30V
25
140
mV
∆
V O
Load Regulation
1mA
≤
I O ≤
100mA
35
150
1mA
≤
I O ≤
40mA
12
75
I Q
Quiescent Current
3
5
∆ I Q
Quiescent Current Change
20V ≤ V IN ≤ 30V
1
mA
1mA
≤
I O
≤
40mA
0.1
V n
Output Noise Voltage
90
µV
Ripple Rejection
f = 120 Hz
18.5V
37
51
dB
≤
V IN ≤
28.5V
I PK
Peak Output Current
140
mA
Average Output Voltage Tempco
I O = 5mA
−1.3
mV/˚C
V IN (Min)
Minimum Value of Input Voltage
Required to Maintain Line Regulation
16.7
17.5
V
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device
outside of its stated operating conditions.
Note 2: Human body model, 1.5 k
Ω
in series with 100pF.
0.75W.
Note 4: Recommended minimum load capacitance of 0.01µF to limit high frequency noise.
Note 5: Typical thermal resistance values for the packages are:
Z Package:
≤
θ
JC = 60 ˚C/W, =
θ
JA = 230 ˚C/W
JA = 180 ˚C/W
micro SMD Package:
θ
θ
JA = 230.9˚C/W
5
www.national.com
Note 3: Power dissipation
M Package:
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