LM78L05.PDF
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February 1995
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 ze-
ner diode/resistor combination replacement, the LM78LXX
usually results in an effective output impedance improve-
ment of two orders of magnitude, and lower quiescent cur-
rent. These regulators can provide local on card regulation,
eliminating the distribution problems associated with single
point regulation. 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 metal three-lead TO-39(H)
package, the plastic TO-92 (Z) package, and the plastic
SO-8 (M) package. With adequate heat sinking the regulator
can deliver 100 mA output current. Current limiting is includ-
ed 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
Y
Output voltage tolerances of
g
5% (LM78LXXAC) over
the temperature range
Y
Output current of 100 mA
Y
Internal thermal overload protection
Y
Output transistor safe area protection
Y
Internal short circuit current limit
Y
Available in plastic TO-92 and metal TO-39 and plastic
SO-8 low profile packages
Y
No external components
Y
Output voltages of 5.0V, 6.2V, 8.2V, 9.0V, 12V, 15V
Connection Diagrams
(TO-39)
Metal Can Package (H)
SO-8 Plastic (M)
(Narrow Body)
(TO-92)
Plastic Package (Z)
TL/H/7744±3
TL/H/7744±1
TL/H/7744±2
Bottom View
Order Number
LM78L05ACZ, LM78L09ACZ,
LM78L12ACZ, LM78L15ACZ,
LM78L62ACZ or LM78L82ACZ
See NS Package Number Z03A
Bottom View
Order Number LM78L05ACH,
LM78L12ACH or LM78L15ACH
See NS Package Number H03A
Top View
Order Number LM78L05ACM,
LM78L12ACM or LM78L15ACM
See NS Package Number M08A
C
1995 National Semiconductor Corporation
TL/H/7744
RRD-B30M115/Printed in U. S. A.
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)
Storage Temperature
b
65
§
Cto
a
150
§
C
Operating Junction Temperature
0
§
Cto
a
125
§
C
Lead Temperature (Soldering, 10 seconds)
265
§
C
Internally Limited
ESD Susceptibility (Note 2)
2 kV
Input Voltage
35V
LM78LXXAC Electrical Characteristics
Limits in standard typeface are for T
J
e
25
§
C, bold typeface applies over the 0
§
Cto
a
125
§
C temperature range. Limits are
guaranteed by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Unless
otherwise specified: I
O
e
40 mA, C
I
e
0.33
m
F, C
O
e
0.1
m
F.
LM78L05AC
Unless otherwise specified, V
IN
e
10V
Symbol
Parameter
Conditions
Min
Typ Max Units
V
O
Output Voltage
4.8
5
5.2
7V
s
V
IN
s
20V
1mA
s
I
O
s
40 mA 4.75
5.25
V
(Note 3)
1mA
s
I
O
s
70 mA
4.75
5.25
(Note 3)
D
V
O
Line Regulation
7V
s
V
IN
s
20V
18
75
8V
s
V
IN
s
20V
10
54
mV
D
V
O
Load Regulation
1 mA
s
I
O
s
100 mA
20
60
1mA
s
I
O
s
40 mA
5
30
I
Q
Quiescent Current
3
5
D
I
Q
Quiescent Current Change
8V
s
V
IN
s
20V
1.0
mA
1mA
s
I
O
s
40 mA
0.1
V
n
Output Noise Voltage
f
e
10 Hz to 100 kHz
40
m
V
(Note 4)
D
V
IN
D
V
OUT
Ripple Rejection
f
e
120 Hz
47
62
dB
8V
s
V
IN
s
16V
I
PK
Peak Output Current
140
mA
D
V
O
D
T
Average Output Voltage Tempco
I
O
e
5mA
b
0.65
mV/
§
C
V
IN
Minimum Value of Input Voltage
6.7
7
V
(Min)
Required to Maintain Line Regulation
2
LM78LXXAC Electrical Characteristics
Limits in standard typeface are for T
J
e
25
§
C, bold typeface applies over the 0
§
Cto
a
125
§
C temperature range. Limits are
guaranteed by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Unless
otherwise specified: I
O
e
40 mA, C
I
e
0.33
m
F, C
O
e
0.1
m
F. (Continued)
LM78L62AC
Unless otherwise specified, V
IN
e
12V
Symbol
Parameter
Conditions
Min
Typ Max Units
V
O
Output Voltage
5.95
6.2
6.45
8.5V
s
V
IN
s
20V
1mA
s
I
O
s
40 mA 5.9
6.5
V
(Note 3)
1mA
s
I
O
s
70 mA
5.9
6.5
(Note 3)
D
V
O
Line Regulation
8.5V
s
V
IN
s
20V
65
175
9V
s
V
IN
s
20V
55
125
mV
D
V
O
Load Regulation
1 mA
s
I
O
s
100 mA
13
80
1mA
s
I
O
s
40 mA
6
40
I
Q
Quiescent Current
2
5.5
D
I
Q
Quiescent Current Change
8V
s
V
IN
s
20V
1.5
mA
1mA
s
I
O
s
40 mA
0.1
V
n
Output Noise Voltage
f
e
10 Hz to 100 kHz
50
m
V
(Note 4)
D
V
IN
D
V
OUT
Ripple Rejection
f
e
120 Hz
40
46
dB
10V
s
V
IN
s
20V
I
PK
Peak Output Current
140
mA
D
V
O
D
T
Average Output Voltage Tempco
I
O
e
5mA
b
0.75
mV/
§
C
V
IN
Minimum Value of Input Voltage
7.9
V
(Min)
Required to Maintain Line Regulation
3
LM78LXXAC Electrical Characteristics
Limits in standard typeface are for T
J
e
25
§
C, bold typeface applies over the 0
§
Cto
a
125
§
C temperature range. Limits are
guaranteed by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Unless
otherwise specified: I
O
e
40 mA, C
I
e
0.33
m
F, C
O
e
0.1
m
F. (Continued)
LM78L82AC
Unless otherwise specified, V
IN
e
14V
Symbol
Parameter
Conditions
Min
Typ Max Units
V
O
Output Voltage
7.87
8.2
8.53
11V
s
V
IN
s
23V
1mA
s
I
O
s
40 mA
7.8
8.6
V
(Note 3)
1mA
s
I
O
s
70 mA
7.8
8.6
(Note 3)
D
V
O
Line Regulation
11V
s
V
IN
s
23V
80
175
12V
s
V
IN
s
23V
70
125
mV
D
V
O
Load Regulation
1 mA
s
I
O
s
100 mA
15
80
1mA
s
I
O
s
40 mA
8
40
I
Q
Quiescent Current
2
5.5
D
I
Q
Quiescent Current Change
12V
s
V
IN
s
23V
1.5
mA
1mA
s
I
O
s
40 mA
0.1
V
n
Output Noise Voltage
f
e
10 Hz to 100 kHz
60
m
V
(Note 4)
D
V
IN
D
V
OUT
Ripple Rejection
f
e
120 Hz
39
45
dB
12V
s
V
IN
s
22V
I
PK
Peak Output Current
140
mA
D
V
O
D
T
Average Output Voltage Tempco
I
O
e
5mA
b
0.8
mV/
§
C
V
IN
Minimum Value of Input Voltage
9.9
V
(Min)
Required to Maintain Line Regulation
4
LM78LXXAC Electrical Characteristics
Limits in standard typeface are for T
J
e
25
§
C, bold typeface applies over the 0
§
Cto
a
125
§
C temperature range. Limits are
guaranteed by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Unless
otherwise specified: I
O
e
40 mA, C
I
e
0.33
m
F, C
O
e
0.1
m
F. (Continued)
LM78L09AC
Unless otherwise specified, V
IN
e
15V
Symbol
Parameter
Conditions
Min
Typ Max Units
V
O
Output Voltage
8.64
9.0
9.36
11.5V
s
V
IN
s
24V
1mA
s
I
O
s
40 mA 8.55
9.45
V
(Note 3)
1mA
s
I
O
s
70 mA
8.55
9.45
(Note 3)
D
V
O
Line Regulation
11.5V
s
V
IN
s
24V
100
200
13V
s
V
IN
s
24V
90
150
mV
D
V
O
Load Regulation
1 mA
s
I
O
s
100 mA
20
90
1mA
s
I
O
s
40 mA
10
45
I
Q
Quiescent Current
2
5.5
D
I
Q
Quiescent Current Change
11.5V
s
V
IN
s
24V
1.5
mA
1mA
s
I
O
s
40 mA
0.1
V
n
Output Noise Voltage
70
m
V
D
V
IN
D
V
OUT
Ripple Rejection
f
e
120 Hz
38
44
dB
15V
s
V
IN
s
25V
I
PK
Peak Output Current
140
mA
D
V
O
D
T
Average Output Voltage Tempco
I
O
e
5mA
b
0.9
mV/
§
C
V
IN
Minimum Value of Input Voltage
10.7
V
(Min)
Required to Maintain Line Regulation
5
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