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National Semiconductor
National Semiconductor

LM-340 Datasheet

Series 3-Terminal Positive Regulators


LM-340 Datasheet Preview


January 1995
LM140A LM140 LM340A LM340 LM7800C
Series 3-Terminal Positive Regulators
General Description
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The LM140A LM140 LM340A LM340 LM7800C monolith-
ic 3-terminal positive voltage regulators employ internal cur-
rent-limiting thermal shutdown and safe-area compensa-
tion making them essentially indestructible If adequate
heat sinking is provided they can deliver over 1 0A output
current They are intended as fixed voltage regulators in a
wide range of applications including local (on-card) regula-
tion for elimination of noise and distribution problems asso-
ciated with single-point regulation In addition to use as fixed
voltage regulators these devices can be used with external
components to obtain adjustable output voltages and cur-
rents
Considerable effort was expended to make the entire series
of regulators easy to use and minimize the number of exter-
nal components It is not necessary to bypass the output
although this does improve transient response Input by-
passing is needed only if the regulator is located far from
the filter capacitor of the power supply
The 5V 12V and 15V regulator options are available in the
steel TO-3 power package The LM340A LM340 LM7800C
series is available in the TO-220 plastic power package and
the LM7805 and LM7812 are also available in the surface-
mount TO-263 package
Features
Y Complete specifications at 1A load
Y Output voltage tolerances of g2% at Tj e 25 C and
g4% over the temperature range (LM140A LM340A)
Y Line regulation of 0 01% of VOUT V of DVIN at 1A load
(LM140A LM340A)
Y Load regulation of 0 3% of VOUT A (LM140A LM340A)
Y Internal thermal overload protection
Y Internal short-circuit current limit
Y Output transistor safe area protection
Y Pa Product Enhancement tested
Device Output Voltages
Packages
LM140A LM140 5 12 15
TO-3 (K)
LM340A LM340 5 12 15
TO-3 (K) TO-220 (T)
LM7800C
5 6 8 12 15
18 24
TO-220 (T) TO-263 (S)
(5V and 12V only)
Typical Applications
Fixed Output Regulator
Adjustable Output Regulator
Current Regulator
TL H 7781–1
Required if the regulator is located far from the
power supply filter
Although no output capacitor is needed for sta-
bility it does help transient response (If need-
ed use 0 1 mF ceramic disc)
TL H 7781 – 2
VOUT e 5V a (5V R1 a IQ) R2 5V R1 l 3 IQ
load regulation (Lr)
(R1 a R2) R1 (Lr of
LM340-5)
TL H 7781 – 3
V2-3
IOUT e R1 a IQ
DIQ e 1 3 mA over line and load changes
C1995 National Semiconductor Corporation TL H 7781
RRD-B30M115 Printed in U S A
Page 1

Absolute Maximum Ratings (Note 1)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
(Note 5)
DC Input Voltage
All Devices except LM7824 LM7824C
LM7824 LM7824C
35V
40V
Internal Power Dissipation (Note 2)
Internally Limited
Maximum Junction Temperature
150 C
Storage Temperature Range
b65 C to a150 C
Lead Temperature (Soldering 10 sec )
TO-3 Package (K)
TO-220 Package (T) TO-263 Package (S)
300 C
230 C
ESD Susceptibility (Note 3)
2 kV
www.DataSheet4U.cLoMm140A LM340A
Operating Conditions (Note 1)
Temperature Range (TA) (Note 2)
LM140A LM140
LM340A LM340 LM7805C
LM7812C LM7815C
LM7806C LM7808C LM7818C
LM7824C
b55 C to a125 C
0 C to a70 C
0 C to a125 C
Electrical Characteristics
IOUT e 1A b55 C s TJ s a150 C (LM140A) or 0 C s TJ s a 125 C (LM340A) unless otherwise specified (Note 4)
Output Voltage
5V 12V
15V
Symbol
Input Voltage (unless otherwise noted)
10V 19V
23V Units
Parameter
Conditions
Min Typ Max Min Typ Max Min Typ Max
VO
DVO
DVO
IQ
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
TJ e 25 C
4 9 5 5 1 11 75 12 12 25 14 7 15 15 3
PD s 15W 5 mA s IO s 1A
VMIN s VIN s VMAX
48
5 2 11 5
12 5 14 4
15 6
(7 5 s VIN s 20) (14 8 s VIN s 27) (17 9 s VIN s 30)
IO e 500 mA
DVIN
10 18
22
(7 5 s VIN s 20) (14 8 s VIN s 27) (17 9 s VIN s 30)
TJ e 25 C
DVIN
3 10
4 18
4 22
(7 5 s VIN s 20) (14 5 s VIN s 27) (17 5 s VIN s 30)
TJ e 25 C
Over Temperature
DVIN
4
12
(8 s VIN s 12)
9
30
(16 s VIN s 22)
10
30
(20 s VIN s 26)
TJ e 25 C 5 mA s IO s 1 5A
250 mA s IO s 750 mA
10 25
15
12 32
19
12 35
21
Over Temperature
5 mA s IO s 1A
25 60
75
TJ e 25 C
Over Temperature
66
65 65
6
65
V
V
V
mV
V
mV
V
mV
mV
V
mV
mV
mV
mA
mA
DIQ Quiescent Current 5 mA s IO s 1A
Change
TJ e 25 C IO e 1A
VMIN s VIN s VMAX
IO e 500 mA
VMIN s VIN s VMAX
VN Output Noise Voltage TA e 25 C 10 Hz s f s 100 kHz
DVIN Ripple Rejection
DVOUT
TJ e 25 C f e 120 Hz IO e 1A
or f e 120 Hz IO e 500 mA
Over Temperature
VMIN s VIN s VMAX
RO Dropout Voltage TJ e 25 C IO e 1A
Output Resistance f e 1 kHz
Short-Circuit Current TJ e 25 C
Peak Output Current TJ e 25 C
Average TC of VO Min TJ e 0 C IO e 5 mA
VIN Input Voltage
TJ e 25 C
Required to Maintain
Line Regulation
05 05
05
08 08
(7 5 s VIN s 20) (14 8 s VIN s 27)
08 08
(8 s VIN s 25) (15 s VIN s 30)
40 75
08
(17 9 s VIN s 30)
08
(17 9 s VIN s 30)
90
68 80
68
61 72
61
60 70
60
mA
mA
V
mA
V
mV
dB
dB
(8 s VIN s 18)
20
8
21
24
b0 6
(15 s VIN s 25)
20
18
15
24
b1 5
(18 5 s VIN s 28 5) V
20
19
12
24
b1 8
V
mX
A
A
mV C
7 5 14 5
17 5
V
2
Page 2

LM140
Electrical Characteristics (Note 4) b55 C s TJ s a150 C unless otherwise specified
Output Voltage
5V 12V
15V
Symbol
Input Voltage (unless otherwise noted)
10V 19V
23V Units
Parameter
Conditions
Min Typ Max Min Typ Max Min Typ Max
VO Output Voltage
TJ e 25 C 5 mA s IO s 1A
48 5 52
PD s 15W 5 mA s IO s 1A
VMIN s VIN s VMAX
4 75 5 25
(8 s VIN s 20)
DVO Line Regulation
IO e 500 mA TJ e 25 C
DVIN
3 50
(7 s VIN s 25)
b55 C s TJ s a150 C
DVIN
50
(8 s VIN s 20)
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IO s 1A
TJ e 25 C
DVIN
50
(7 5 s VIN s 20)
b55 C s TJ s a150 C
DVIN
25
(8 s VIN s 12)
DVO Load Regulation
TJ e 25 C
5 mA s IO s 1 5A
250 mA s IP s 750 mA
10 50
25
b55 C s TJ s a150 C
5 mA s IO s 1A
50
IQ Quiescent Current IO s 1A TJ e 25 C
b55 C s TJ s a150 C
6
7
DIQ Quiescent Current 5 mA s IO s 1A
Change
TJ e 25 C IO s 1A
VMIN s VIN s VMAX
05
08
(8 s VIN s 20)
IO e 500 mA b55 C s TJ s a150 C
VMIN s VIN s VMAX
08
(8 s VIN s 25)
VN Output Noise Voltage TA e 25 C 10 Hz s f s 100 kHz
40
DVIN Ripple Rejection
DVOUT
IO s 1A TJ e 25 C or
f e 120 Hz
IO s 500 mA
b55 C s TJ sa150 C
VMIN s VIN s VMAX
68 80
68
(8 s VIN s 18)
RO Dropout Voltage TJ e 25 C IO e 1A
Output Resistance f e 1 kHz
Short-Circuit Current TJ e 25 C
Peak Output Current TJ e 25 C
Average TC of VOUT 0 C s TJ s a150 C IO e 5 mA
20
8
21
24
b0 6
VIN Input Voltage
TJ e 25 C IO s 1A
Required to Maintain
Line Regulation
75
11 5 12 12 5
11 4
12 6
(15 5 s VIN s 27)
4 120
(14 5 s VIN s 30)
120
(15 s VIN s 27)
120
(14 6 s VIN s 27)
60
(16 s VIN s 22)
12 120
60
120
6
7
05
08
(15 s VIN s 27)
08
(15 s VIN s 30)
75
61 72
61
(15 s VIN s 25)
20
18
15
24
b1 5
14 6
14 4 15 15 6
14 25
15 75
(18 5 s VIN s 30)
4 150
(17 5 s VIN s 30)
150
(18 5 s VIN s 30)
150
(17 7 s VIN s 30)
75
(20 s VIN s 26)
12 150
75
V
V
V
mV
V
mV
V
mV
V
mV
V
mV
mV
150 mV
6
7
05
08
(18 5 s VIN s 30)
08
(18 5 s VIN s 30)
90
60 70
60
mA
mA
mA
mA
V
mA
V
mV
dB
dB
(18 5 s VIN s 28 5)
20
19
12
24
b1 8
V
V
mX
A
A
mV C
17 7
V
3
Page 3
Part Number LM-340
Manufactur National Semiconductor
Description Series 3-Terminal Positive Regulators
Total Page 14 Pages
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