LM341/LM78MXX Series
3-Terminal Positive Voltage Regulators
General Description
The LM341 and LM78MXX series of three-terminal positive
voltage regulators employ built-in current limiting, thermal
shutdown, and safe-operating area protection which makes
them virtually immune to damage from output overloads.
With adequate heatsinking, they can deliver in excess of
0.5A output current. Typical applications would include local
(on-card) regulators which can eliminate the noise and de-
graded performance associated with single-point regulation.
Features
n
Output current in excess of 0.5A
n
No external components
n
Internal thermal overload protection
n
Internal short circuit current-limiting
n
Output transistor safe-area compensation
n
Available in TO-220, TO-39, and TO-252 D-PAK
packages
n
Output voltages of 5V, 12V, and 15V
Connection Diagrams
TO-39 Metal Can Package (H)
DS010484-5
Bottom View
Order Number LM78M05CH, LM78M12CH or LM78M15CH
See NS Package Number H03A
TO-220 Power Package (T)
DS010484-6
Top View
Order Number LM341T-5.0, LM341T-12, LM341T-15, LM78M05CT, LM78M12CT or LM78M15CT
See NS Package Number T03B
TO-252
DS010484-19
Top View
Order Number LM78M05CDT
See NS Package Number TD03B
July 1999
LM341/LM78MXX
Series
3-T
erminal
Positive
V
oltage
Regulators
1999 National Semiconductor Corporation
DS010484
www.national.com
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Lead Temperature (Soldering, 10 seconds)
TO-39 Package (H)
300C
TO-220 Package (T)
260C
Storage Temperature Range
-65C to +150C
Operating Junction Temperature
Range
-40C to +125C
Power Dissipation (Note 2)
Internally Limited
Input Voltage
5V
V
O
15V
35V
ESD Susceptibility
TBD
Electrical Characteristics
Limits in standard typeface are for T
J
= 25C, and limits in boldface type apply over the -40C to +125C operating temperature
range. Limits are guaranteed by production testing or correlation techniques using standard Statistical Quality Control (SQC)
methods.
LM341-5.0, LM78M05C
Unless otherwise specified: V
IN
= 10V, C
IN
= 0.33 F, C
O
= 0.1 F
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
O
Output Voltage
I
L
= 500 mA
4.8
5.0
5.2
V
5 mA
I
L
500 mA
4.75
5.0
5.25
P
D
7.5W, 7.5V
V
IN
20V
V
R LINE
Line Regulation
7.2V
V
IN
25V
I
L
= 100 mA
50
mV
I
L
= 500 mA
100
V
R LOAD
Load Regulation
5 mA
I
L
500 mA
100
I
Q
Quiescent Current
I
L
= 500 mA
4
10.0
mA
I
Q
Quiescent Current Change
5 mA
I
L
500 mA
0.5
7.5V
V
IN
25V, I
L
= 500 mA
1.0
V
n
Output Noise Voltage
f = 10 Hz to 100 kHz
40
V
Ripple Rejection
f = 120 Hz, I
L
= 500 mA
78
dB
V
IN
Input Voltage Required
I
L
= 500 mA
7.2
V
to Maintain Line Regulation
V
O
Long Term Stability
I
L
= 500 mA
20
mV/khrs
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2
Electrical Characteristics
Limits in standard typeface are for T
J
= 25C, and limits in boldface type apply over the -40C to +125C operating temperature
range. Limits are guaranteed by production testing or correlation techniques using standard Statistical Quality Control (SQC)
methods. (Continued)
LM341-12, LM78M12C
Unless otherwise specified: V
IN
= 19V, C
IN
= 0.33 F, C
O
= 0.1 F
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
O
Output Voltage
I
L
= 500 mA
11.5
12
12.5
V
5 mA
I
L
500 mA
11.4
12
12.6
P
D
7.5W, 14.8V
V
IN
27V
V
R LINE
Line Regulation
14.5V
V
IN
30V
I
L
= 100 mA
120
mV
I
L
= 500 mA
240
V
R LOAD
Load Regulation
5 mA
I
L
500 mA
240
I
Q
Quiescent Current
I
L
= 500 mA
4
10.0
mA
I
Q
Quiescent Current Change
5 mA
I
L
500 mA
0.5
14.8V
V
IN
30V, I
L
= 500 mA
1.0
V
n
Output Noise Voltage
f = 10 Hz to 100 kHz
75
V
Ripple Rejection
f = 120 Hz, I
L
= 500 mA
71
dB
V
IN
Input Voltage Required
I
L
= 500 mA
14.5
V
to Maintain Line Regulation
V
O
Long Term Stability
I
L
= 500 mA
48
mV/khrs
LM341-15, LM78M15C
Unless otherwise specified: V
IN
= 23V, C
IN
= 0.33 F, C
O
= 0.1 F
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
O
Output Voltage
I
L
= 500 mA
14.4
15
15.6
V
5 mA
I
L
500 mA
14.25
15
15.75
P
D
7.5W, 18V
V
IN
30V
V
R LINE
Line Regulation
17.6V
V
IN
30V
I
L
= 100 mA
150
mV
I
L
= 500 mA
300
V
R LOAD
Load Regulation
5 mA
I
L
500 mA
300
I
Q
Quiescent Current
I
L
= 500 mA
4
10.0
mA
I
Q
Quiescent Current Change
5 mA
I
L
500 mA
0.5
18V
V
IN
30V, I
L
= 500 mA
1.0
V
n
Output Noise Voltage
f = 10 Hz to 100 kHz
90
V
Ripple Rejection
f = 120 Hz, I
L
= 500 mA
69
dB
V
IN
Input Voltage Required
I
L
= 500 mA
17.6
V
to Maintain Line Regulation
V
O
Long Term Stability
I
L
= 500 mA
60
mV/khrs
Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the de-
vice outside of its rated operating conditions.
Note 2: The typical thermal resistance of the three package types is:
T (TO-220) package:
(JA)
= 60 C/W,
(JC)
= 5 C/W
H (TO-39) package:
(JA)
= 120 C/W,
(JC)
= 18 C/W
DT (TO-252) package:
(JA)
= 92 C/W,
(JC)
= 10 C/W
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