July 1999
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 degraded performance associated with single-point regulation.
Features
nOutput current in excess of 0.5A
nNo external components
nInternal thermal overload protection
nInternal short circuit current-limiting
nOutput transistor safe-area compensation
nAvailable in TO-220, TO-39, and TO-252 D-PAK packages
nOutput 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
Regulators Voltage Positive Terminal-3 Series LM341/LM78MXX
© 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) |
300ÊC |
TO-220 Package (T) |
260ÊC |
Storage Temperature Range |
−65ÊC to +150ÊC |
Operating Junction Temperature |
|
Range |
−40ÊC to +125ÊC |
Power Dissipation (Note 2) |
Internally Limited |
Input Voltage |
|
5V ≤ VO ≤ 15V |
35V |
ESD Susceptibility |
TBD |
Electrical Characteristics
Limits in standard typeface are for TJ = 25ÊC, and limits in boldface type apply over the −40ÊC to +125ÊC 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: VIN = 10V, CIN = 0.33 µF, CO = 0.1 µF
Symbol |
Parameter |
Conditions |
|
Min |
Typ |
Max |
Units |
|
VO |
Output Voltage |
IL= 500 mA |
|
4.8 |
5.0 |
5.2 |
V |
|
|
|
5 mA ≤ IL ≤ 500 mA |
|
4.75 |
5.0 |
5.25 |
|
|
|
|
PD ≤ 7.5W, 7.5V ≤ VIN ≤ 20V |
|
|
|
|
||
VR LINE |
Line Regulation |
7.2V ≤ VIN ≤ 25V |
|
IL = 100 mA |
|
|
50 |
mV |
|
|
|
|
IL = 500 mA |
|
|
100 |
|
VR LOAD |
Load Regulation |
5 mA ≤ IL ≤ 500 mA |
|
|
|
100 |
|
|
IQ |
Quiescent Current |
IL = 500 mA |
|
|
4 |
10.0 |
mA |
|
IQ |
Quiescent Current Change |
5 mA ≤ IL ≤ 500 mA |
|
|
|
0.5 |
|
|
|
|
7.5V ≤ VIN ≤ 25V, IL = 500 mA |
|
|
1.0 |
|
||
Vn |
Output Noise Voltage |
f = 10 Hz to 100 kHz |
|
|
40 |
|
µV |
|
|
Ripple Rejection |
f = 120 Hz, IL = 500 mA |
|
|
78 |
|
dB |
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
VIN |
Input Voltage Required |
IL = 500 mA |
|
7.2 |
|
|
V |
|
|
to Maintain Line Regulation |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
VO |
Long Term Stability |
IL = 500 mA |
|
|
|
20 |
mV/khrs |
|
www.national.com |
2 |
Electrical Characteristics
Limits in standard typeface are for TJ = 25ÊC, and limits in boldface type apply over the −40ÊC to +125ÊC 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: VIN = 19V, CIN = 0.33 µF, CO = 0.1 µF
Symbol |
Parameter |
Conditions |
|
Min |
Typ |
Max |
Units |
|
VO |
Output Voltage |
IL= 500 mA |
|
11.5 |
12 |
12.5 |
V |
|
|
|
5 mA ≤ IL ≤ 500 mA |
|
11.4 |
12 |
12.6 |
|
|
|
|
PD ≤ 7.5W, 14.8V ≤ VIN ≤ 27V |
|
|
|
|
||
VR LINE |
Line Regulation |
14.5V ≤ VIN ≤ 30V |
|
IL = 100 mA |
|
|
120 |
mV |
|
|
|
|
IL = 500 mA |
|
|
240 |
|
VR LOAD |
Load Regulation |
5 mA ≤ IL ≤ 500 mA |
|
|
|
240 |
|
|
IQ |
Quiescent Current |
IL = 500 mA |
|
|
4 |
10.0 |
mA |
|
IQ |
Quiescent Current Change |
5 mA ≤ IL ≤ 500 mA |
|
|
|
0.5 |
|
|
|
|
14.8V ≤ VIN ≤ 30V, IL = 500 mA |
|
|
1.0 |
|
||
Vn |
Output Noise Voltage |
f = 10 Hz to 100 kHz |
|
|
75 |
|
µV |
|
|
Ripple Rejection |
f = 120 Hz, IL = 500 mA |
|
|
71 |
|
dB |
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
VIN |
Input Voltage Required |
IL = 500 mA |
|
14.5 |
|
|
V |
|
|
to Maintain Line Regulation |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
VO |
Long Term Stability |
IL = 500 mA |
|
|
|
48 |
mV/khrs |
|
LM341-15, LM78M15C
Unless otherwise specified: VIN = 23V, CIN = 0.33 µF, CO = 0.1 µF
Symbol |
Parameter |
Conditions |
|
Min |
Typ |
Max |
Units |
|
|
|
|
|
|
|
|
|
|
VO |
Output Voltage |
IL= 500 mA |
|
14.4 |
15 |
15.6 |
V |
|
|
|
5 mA ≤ IL ≤ 500 mA |
|
14.25 |
15 |
15.75 |
|
|
|
|
PD ≤ 7.5W, 18V ≤ VIN ≤ 30V |
|
|
|
|
||
VR LINE |
Line Regulation |
17.6V ≤ VIN ≤ 30V |
|
IL = 100 mA |
|
|
150 |
mV |
|
|
|
|
IL = 500 mA |
|
|
300 |
|
VR LOAD |
Load Regulation |
5 mA ≤ IL ≤ 500 mA |
|
|
|
300 |
|
|
IQ |
Quiescent Current |
IL = 500 mA |
|
|
4 |
10.0 |
mA |
|
IQ |
Quiescent Current Change |
5 mA ≤ IL ≤ 500 mA |
|
|
|
0.5 |
|
|
|
|
18V ≤ VIN ≤ 30V, IL = 500 mA |
|
|
1.0 |
|
||
Vn |
Output Noise Voltage |
f = 10 Hz to 100 kHz |
|
|
90 |
|
µV |
|
|
Ripple Rejection |
f = 120 Hz, IL = 500 mA |
|
|
69 |
|
dB |
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
VIN |
Input Voltage Required |
IL = 500 mA |
|
17.6 |
|
|
V |
|
|
to Maintain Line Regulation |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
VO |
Long Term Stability |
IL = 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 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 ÊC/W, θ(JC) = 5 ÊC/W
H (TO-39) package: θ(JA) = 120 ÊC/W, θ(JC) = 18 ÊC/W
DT (TO-252) package: θ(JA) = 92 ÊC/W, θ(JC) = 10 ÊC/W
3 |
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Schematic Diagram
DS010484-1
www.national.com |
4 |
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