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LM341/LM78MXX Series 3-Terminal Positive Voltage Regulators
August 2005
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
Output current in excess of 0.5A
No external components
Internal thermal overload protection
Internal short circuit current-limiting
Output transistor safe-area compensation
Available in TO-220, TO-39, and TO-252 D-PAK
packages
n
Output voltages of 5V, 12V, and 15V
n
n
n
n
n
n
Connection Diagrams
TO-39 Metal Can Package (H)
01048405
Bottom View
Order Number LM78M05CH, LM78M12CH or LM78M15CH
See NS Package Number H03A
TO-220 Power Package (T)
01048406
Top View
Order Number LM341T-5.0, LM341T-12, LM341T-15, LM78M05CT, LM78M12CT or LM78M15CT
See NS Package Number T03B
TO-252
01048419
Top View
Order Number LM78M05CDT
See NS Package Number TD03B
© 2005 National Semiconductor Corporation
DS010484
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LM341/LM78MXX Series
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)
TO-220 Package (T)
Storage Temperature Range
300˚C
260˚C
−65˚C to +150˚C
Operating Junction Temperature
Range
Power Dissipation (Note 2)
Input Voltage
5V
≤
V
O
≤
15V
ESD Susceptibility
−40˚C to +125˚C
Internally Limited
35V
TBD
Electrical Characteristics
Limits in standard typeface are for T
J
= 25˚C, and limits in
boldface type
apply over the −40˚C to +125˚C 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 µF, C
O
= 0.1 µF
Symbol
V
O
Parameter
Output Voltage
I
L
= 500 mA
5 mA
≤
I
L
≤
500 mA
P
D
≤
7.5W, 7.5V
≤
V
IN
≤
20V
V
R LINE
V
R LOAD
I
Q
∆I
Q
V
n
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current Change
Output Noise Voltage
Ripple Rejection
7.2V
≤
V
IN
≤
25V
5 mA
≤
I
L
≤
500 mA
I
L
= 500 mA
5 mA
≤
I
L
≤
500 mA
7.5V
≤
V
IN
≤
25V, I
L
= 500 mA
f = 10 Hz to 100 kHz
f = 120 Hz, I
L
= 500 mA
78
V
IN
∆V
O
Input Voltage Required
to Maintain Line Regulation
Long Term Stability
I
L
= 500 mA
20
mV/khrs
I
L
= 500 mA
7.2
dB
V
40
4
I
L
= 100 mA
I
L
= 500 mA
50
100
100
10.0
0.5
1.0
µV
mA
mV
Conditions
Min
4.8
4.75
Typ
5.0
5.0
Max
5.2
5.25
Units
V
www.national.com
2
LM341/LM78MXX Series
Electrical Characteristics
Limits in standard typeface are for T
J
= 25˚C, and limits in
boldface type
apply over the −40˚C to +125˚C 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 µF, C
O
= 0.1 µF
Symbol
V
O
Parameter
Output Voltage
I
L
= 500 mA
5 mA
≤
I
L
≤
500 mA
P
D
≤
7.5W, 14.8V
≤
V
IN
≤
27V
V
R LINE
V
R LOAD
I
Q
∆I
Q
V
n
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current Change
Output Noise Voltage
Ripple Rejection
14.5V
≤
V
IN
≤
30V
5 mA
≤
I
L
≤
500 mA
I
L
= 500 mA
5 mA
≤
I
L
≤
500 mA
14.8V
≤
V
IN
≤
30V, I
L
= 500 mA
f = 10 Hz to 100 kHz
f = 120 Hz, I
L
= 500 mA
71
V
IN
∆V
O
Input Voltage Required
to Maintain Line Regulation
Long Term Stability
I
L
= 500 mA
48
mV/khrs
I
L
= 500 mA
14.5
dB
V
75
4
I
L
= 100 mA
I
L
= 500 mA
120
240
240
10.0
0.5
1.0
µV
mA
mV
Conditions
Min
11.5
11.4
Typ
12
12
Max
12.5
12.6
Units
V
LM341-15, LM78M15C
Unless otherwise specified: V
IN
= 23V, C
IN
= 0.33 µF, C
O
= 0.1 µF
Symbol
V
O
Parameter
Output Voltage
I
L
= 500 mA
5 mA
≤
I
L
≤
500 mA
P
D
≤
7.5W, 18V
≤
V
IN
≤
30V
V
R LINE
V
R LOAD
I
Q
∆I
Q
V
n
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current Change
Output Noise Voltage
Ripple Rejection
17.6V
≤
V
IN
≤
30V
5 mA
≤
I
L
≤
500 mA
I
L
= 500 mA
5 mA
≤
I
L
≤
500 mA
18V
≤
V
IN
≤
30V, I
L
= 500 mA
f = 10 Hz to 100 kHz
f = 120 Hz, I
L
= 500 mA
69
V
IN
∆V
O
Input Voltage Required
to Maintain Line Regulation
Long Term Stability
I
L
= 500 mA
60
mV/khrs
I
L
= 500 mA
17.6
dB
V
90
4
I
L
= 100 mA
I
L
= 500 mA
150
300
300
10.0
0.5
1.0
µV
mA
mV
Conditions
Min
14.4
14.25
Typ
15
15
Max
15.6
15.75
Units
V
Note 1:
Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the
device outside of its rated operating conditions.
Note 2:
The typical thermal resistance of the three package types is:
T
(TO-220) package:
θ
(JA)
= 60 ˚C/W,
θ
(JC)
= 5 ˚C/W
H
(TO-39) package:
θ
(JA)
= 120 ˚C/W,
θ
(JC)
= 18 ˚C/W
DT
(TO-252) package:
θ
(JA)
= 92 ˚C/W,
θ
(JC)
= 10 ˚C/W
3
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LM341/LM78MXX Series
Schematic Diagram
01048401
www.national.com
4
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