TL H 7782
LM140LLM340L
Series
3-Terminal
Positive
Regulators
February 1995
LM140L LM340L Series 3-Terminal Positive Regulators
General Description
The LM140L series of three terminal positive regulators is
available with several fixed output voltages making them
useful in a wide range of applications The LM140LA is an
improved version of the LM78LXX series with a tighter out-
put voltage tolerance (specified over the full military temper-
ature range) higher ripple rejection better regulation and
lower quiescent current The LM140LA regulators have
g
2% V
OUT
specification 0 04% V line regulation and
0 01% mA load regulation When used as a zener diode re-
sistor combination replacement the LM140LA usually re-
sults in an effective output impedance improvement of two
orders of magnitude and lower quiescent current These
regulators can provide local on card regulation eliminating
the distribution problems associated with single point regu-
lation The voltages available allow the LM140LA to be used
in logic systems instrumentation Hi-Fi and other solid state
electronic equipment Although designed primarily as fixed
voltage regulators these devices can be used with external
components to obtain adjustable voltages and currents
The LM140LA LM340LA are available in the low profile
metal three lead TO-39 (H) and the LM340LA are also avail-
able in the plastic TO-92 (Z) With adequate heat sinking the
regulator can deliver 100 mA output current Current limiting
is included to limit the peak output current to a safe value
Safe area protection for the output transistor is provided to
limit internal power dissipation If internal power dissipation
becomes too high for the heat sinking provided the thermal
shut-down circuit takes over preventing the IC from over-
heating
For applications requiring other voltages see LM117L Data
Sheet
Features
Y
Line regulation of 0 04% V
Y
Load regulation of 0 01% mA
Y
Output voltage tolerances of
g
2% at T
j
e
25 C and
g
4% over the temperature range (LM140LA)
g
3% over the temperature range (LM340LA)
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
metal
TO-39
low
profile
package
(LM140LA LM340LA) and plastic TO-92 (LM340LA)
Output Voltage Options
LM140LA-5 0
5V
LM340LA-5 0
5V
LM140LA-12
12V
LM340LA-12
12V
LM140LA-15
15V
LM340LA-15
15V
Connection Diagrams
TO-39 Metal Can Package (H)
TL H 7782 2
Bottom View
Order Number LM140LAH-5 0 LM140LAH-5 0 883 LM140LAH-12
LM140LAH-12 883 LM140LAH-15 LM140LAH-15 883 LM340LAH-5 0 LM340LAH-12 or LM340LAH-15
See NS Package Number H03A
TO-92 Plastic Package (Z)
TL H 7782 3
Bottom View
Order Number LM340LAZ-5 0 LM340LAZ-12 or LM340LAZ-15
See NS Package Number Z03A
C1995 National Semiconductor Corporation
RRD-B30M115 Printed in U S A
Absolute Maximum Ratings
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
(Note 4)
Input Voltage
35V
Internal Power Dissipation (Note 1)
Internally Limited
Operating Temperature Range
LM140LA
b
55 C to
a
125 C
LM340LA
0 C to
a
70 C
Maximum Junction Temperature
a
150 C
Storage Temperature Range
Metal Can (H package)
b
65 C to
a
150 C
Molded TO-92
b
55 C to
a
150 C
Lead Temperature (Soldering 10 sec )
Metal Can
a
300 C
Plastic TO-92
a
230 C
Electrical Characteristics
Test conditions unless otherwise specified T
A
e b
55 C to
a
125 C (LM140LA) T
A
e
0 C to
a
70 C (LM340LA) I
O
e
40 mA
C
IN
e
0 33 mF C
O
e
0 01 mF
Output Voltage Option
5 0V
12V
15V
Input Voltage (unless otherwise noted)
10V
19V
23V
Units
Symbol
Parameter
Conditions
Min Typ Max
Min
Typ
Max
Min
Typ
Max
V
O
Output Voltage
T
j
e
25 C
4 9
5
5 1
11 75
12
12 25
14 7
15
15 3
Output Voltage
LM140LA
I
O
e
1
b
100 mA
4 8
5 2
11 5
12 5
14 4
15 6
Over Temp
(7 2 20)
(14 5 27)
(17 6 30)
V
(Note 3)
LM340LA
I
O
e
1
b
100 mA or
4 85
5 15 11 65
12 35 14 55
15 45
I
O
e
1
b
40 mA and
(7 20)
(14 3 27)
(17 5 30)
V
IN
e
( )V
D
V
O
Line Regulation
T
j
e
25 C
I
O
e
40 mA
18
30
30
65
37
70
V
IN
e
( )V
(7 25)
(14 2 30)
(17 3 30)
I
O
e
100 mA
18
30
30
65
37
70
mV
V
IN
e
( )V
(7 5 25)
(14 5 30)
(17 5 30)
Load Regulation T
j
e
25 C
I
O
e
1
b
40 mA
5
20
10
40
12
50
I
O
e
1
b
100 mA
20
40
30
80
35
100
Long Term
12
24
30
mV
Stability
1000 hrs
I
O
Quiescent
T
j
e
25 C
3
4 5
3
4 5
3 1
4 5
mA
Current
T
j
e
125 C
4 2
4 2
4 2
D
I
Q
Quiescent
T
j
e
25 C
D
Load I
O
e
1
b
40 mA
0 1
0 1
0 1
Current Change
D
Line
0 5
0 5
0 5
mA
V
IN
e
( )V
(7 5 25)
(14 3 30)
(17 5 30)
V
N
Output Noise
T
j
e
25 C (Note 2)
40
80
90
m
V
Voltage
f
e
10 Hz 10 kHz
D
V
IN
D
V
OUT
Ripple Rejection f
e
120 Hz V
IN
e
( )V
55
62
47
54
45
52
dB
(7 5 18)
(14 5 25)
(17 5 28 5)
Input Voltage
Required to
T
j
e
25 C I
O
e
40 mA
7
14 2
17 3
V
Maintain Line
Regulation
Note 1
Thermal resistance of H-package is typically 26 C W i
jC
250 C W i
jA
still air and 94 C W i
jA
400 lf min of air For the Z-package is 60 C W i
jC
232 C
W i
jA
still air and 88 C W i
jA
at 400 lf min of air The maximum junction temperature shall not exceed 125 C on electrical parameters
Note 2
It is recommended that a minimum load capacitor of 0 01 mF be used to limit the high frequency noise bandwidth
Note 3
The temperature coefficient of V
OUT
is typically within 0 01% V
O
C
Note 4
A military RETS specification is available upon request At the time of printing the LM140LA-5 0 -12 and -15 RETS specifications complied with the Min
and Max limits in this table The LM140LAH-5 0 LM140LAH-12 and LM140LAH-15 may also be procured as Standard Military Drawings
2
Typical Performance Characteristics
Dissipation
Maximum Average Power
(Metal Can Package)
Power Dissipation
Maximum Average
Dissipation (Plastic Package)
Maximum Average Power
Peak Output Current
Dropout Voltage
Output Impedance
Ripple Rejection
Quiescent Current
Quiescent Current
TL H 7782 4
Typical Applications
Fixed Output Regulator
TL H 7782 5
Required if the regulator is located far from the power supply filter
See note 3 in the electrical characteristics table
Adjustable Output Regulator
TL H 7782 6
V
OUT
e
5V
a
(5V R1
a
I
O
) R2
5V R1
e
3 I
O
load regulation (L ) (R1
a
R2) R1 (L of LM140LA-5 0)
3
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