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LM140LQML Series 3-Terminal Positive Regulators
March 2006
LM140LQML 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 tem-
perature range), higher ripple rejection, better regulation and
lower quiescent current. The LM140LA regulators have
±
2%
V
OUT
specification, 0.04%/V line regulation, and 0.01%/mA
load regulation. When used as a zener diode/resistor com-
bination replacement, the LM140LA usually results 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 distribu-
tion problems associated with single point regulation. The
voltages available allow the LM140LA to be used in logic
systems, instrumentation, Hi-Fi, and other solid state elec-
tronic equipment. Although designed primarily as fixed volt-
age regulators, these devices can be used with external
components to obtain adjustable voltages and currents.
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 dissipa-
tion. If internal power dissipation becomes too high for the
heat sinking provided, the thermal shut-down circuit takes
over, preventing the IC from overheating.
Features
n
Line regulation of 0.04%/V
n
Load regulation of 0.01%/mA
n
Output voltage tolerances of
±
2% at T
j
= 25˚C and
±
4%
over the temperature range
n
Output current of 100 mA
n
Internal thermal overload protection
n
Output transistor safe area protection
n
Internal short circuit current limit
Output Voltage Options
Device ID
LM140LA-5.0
LM140LA-12
LM140LA-15
Output Voltage
5V
12V
15V
Ordering Information
NS Part Number
LM140LAH-5.0/883
LM140LAH-12/883
LM140LAH-15/883
JAN Part Number
NS Package Number
H03A
H03A
H03A
Package Description
3LD T0–39 Metal Can
3LD T0–39 Metal Can
3LD T0–39 Metal Can
Connection Diagrams
TO-39 Metal Can Package (H)
20155302
Bottom View
See NS Package Number H03A
© 2006 National Semiconductor Corporation
DS201553
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LM140LQML Series
Equivalent Circuit
20155301
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2
LM140LQML Series
Absolute Maximum Ratings
(Note 1)
Input Voltage
Internal Power Dissipation (Note 2)
Operating Temperature Range
Maximum Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10 sec.)
Thermal Resistance
θ
JA
Still Air
@
0.5W
500LF / Min Air Flow
@
0.5W
θ
JC
(
@
1.0W)
ESD Susceptibility (Note 3)
201˚C/W
79˚C/W
38˚C/W
TBD
35V
Internally Limited
−55˚C
≤
T
A
≤
+125˚C
+150˚C
−65˚C
≤
T
A
≤
+150˚C
+300˚C
Quality Conformance Inspection
Mil-Std-883, Method 5005 - Group A
Subgroup
1
2
3
4
5
6
7
8A
8B
9
10
11
12
13
14
Description
Static tests at
Static tests at
Static tests at
Dynamic tests at
Dynamic tests at
Dynamic tests at
Functional tests at
Functional tests at
Functional tests at
Switching tests at
Switching tests at
Switching tests at
Settling time at
Settling time at
Settling time at
Temp ˚C
25
125
-55
25
125
-55
25
125
-55
25
125
-55
25
125
-55
3
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LM140LQML Series
LM140LA-5.0 Electrical Characteristics
DC Parameters
The following conditions apply, unless otherwise specified.
DC: V
I
= 10V, I
L
= 40mA
Symbol
I
Q
V
O
Parameter
Quiescent Current
Output Voltage
V
I
= 20V, I
L
= 5mA
V
I
= 20V, I
L
= 100mA
V
I
= 7.2V, I
L
= 5mA
V
I
= 7.2V, I
L
= 100mA
R
Load
R
Line
∆I
Q
Load Regulation
Line Regulation
Quiescent Current Change
5mA
≤
I
L
≤
40 mA
5mA
≤
I
L
≤
100mA
I
L
= 100mA, 7.5V
≤
V
I
≤
25V
7V
≤
V
I
≤
25V
5mA
≤
I
L
≤
40mA
7.5V
≤
V
I
≤
35V
4.9
4.8
4.8
4.8
4.8
-20
-40
-30
-30
-0.1
-0.5
Conditions
Notes
Min
Max
4.5
4.2
5.1
5.2
5.2
5.2
5.2
20
40
30
30
0.1
0.5
Unit
mA
mA
V
V
V
V
V
mV
mV
mV
mV
mA
mA
Sub-
groups
1
2
1
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1
1
1
1
1, 2, 3
1
AC Parameters
Symbol
RR
Parameter
Ripple Rejection
Conditions
ƒ = 120Hz, e
I
= 1V
RMS
Notes
Min
55
Max
Unit
dB
Sub-
groups
4
LM140LA-12 Electrical Characteristics
DC Parameters
The following conditions apply, unless otherwise specified.
DC: V
I
= 19V, I
L
= 40mA
Symbol
I
Q
V
O
Parameter
Quiescent Current
Output Voltage
V
I
= 27V, I
L
= 5mA
V
I
= 27V, I
L
= 100mA
V
I
= 14.5V, I
L
= 5mA
V
I
= 14.5V, I
L
= 100mA
R
Load
R
Line
∆I
Q
Load Regulation
Line Regulation
Quiescent Current Change
5mA
≤
I
L
≤
40mA
5mA
≤
I
L
≤
100mA
I
L
= 100mA, 14.5V
≤
V
I
≤
30V
14.2V
≤
V
I
≤
30V
5mA
≤
I
L
≤
40mA
14.3V
≤
V
I
≤
35V
Conditions
Notes
Min
Max
4.5
4.2
11.75 12.25
11.5
11.5
11.5
11.5
-40
-80
-65
-65
-0.1
-0.5
12.5
12.5
12.5
12.5
40
80
65
65
0.1
0.5
Unit
mA
mA
V
V
V
V
V
mV
mV
mV
mV
mA
mA
Sub-
groups
1
2
1
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1
1
1
1
1, 2, 3
1
AC Parameters
Symbol
RR
Parameter
Ripple Rejection
Conditions
ƒ = 120Hz, e
I
= 1V
RMS
Notes
Min
47
Max
Unit
dB
Sub-
groups
4
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