NSC LM340K-5.0, LM340K-15, LM340G-5MWC, LM340T-15, LM340T-12 Datasheet
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LM340/LM78MXX Series
3-Terminal Positive Regulators
General Description
The LM140/LM340A/LM340/LM7800C monolithic 3-terminal
positive voltage regulators employ internal current-limiting,
thermal shutdown and safe-area compensation, making
them essentially indestructible. If adequate heat sinking is
provided, theycan deliver over 1.0A output current. They are
intended as fixed voltage regulators in a wide range of applications including local (on-card) regulation for elimination of
noise and distribution problems associated 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 currents.
Considerable effort was expended to make the entire series
of regulators easy to use and minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response. Input bypassing 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 LM340-5.0 is available in the SOT-223 package, as well
as the LM340-5.0 and LM340-12 in the surface-mount
TO-263 package.
Features
n Complete specifications at 1A load
n Output voltage tolerances of
±
2% at Tj= 25˚C and±4%
over the temperature range (LM340A)
n Line regulation of 0.01% of V
OUT
/V of ∆VINat 1A load
(LM340A)
n Load regulation of 0.3% of V
OUT
/A (LM340A)
n Internal thermal overload protection
n Internal short-circuit current limit
n Output transistor safe area protection
n P
+
Product Enhancement tested
Device
Output
Voltages
Packages
LM140 5, 12,
15
TO-3 (K)
LM340A/LM340 5, 12,
15
TO-3 (K), TO-220 (T),
SOT-223 (MP), TO-263 (S)
(5V and 12V only)
LM7800C 5, 8, 12,15TO-220 (T)
Typical Applications
Fixed Output Regulator
DS007781-1
*
Required if the regulator is located far from the power supply filter.
**
Although no output capacitor is needed for stability, it does help transient
response. (If needed, use 0.1 µF, ceramic disc).
Adjustable Output Regulator
DS007781-2
V
OUT
= 5V + (5V/R1 + IQ) R2 5V/R1>3IQ,
load regulation (L
r
) ≈ [(R1 + R2)/R1] (Lrof LM340-5).
Current Regulator
DS007781-3
∆IQ= 1.3 mA over line and load changes.
Comparison between SOT-223 and D-Pak (TO-252)
Packages
DS007781-38
Scale 1:1
February 2000
LM340/LM78MXX Series 3-Terminal Positive Regulators
© 2000 National Semiconductor Corporation DS007781 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.
(Note 5)
DC Input Voltage
All Devices except
LM7824/LM7824C 35V
LM7824/LM7824C 40V
Internal Power Dissipation (Note 2) Internally Limited
Maximum Junction Temperature 150˚C
Storage Temperature Range −65˚C to +150˚C
Lead Temperature (Soldering, 10 sec.)
TO-3 Package (K) 300˚C
TO-220 Package (T), TO-263
Package (S) 230˚C
ESD Susceptibility (Note 3) 2 kV
Operating Conditions (Note 1)
Temperature Range (T
A
) (Note 2)
LM140A, LM140 −55˚C to +125˚C
LM340A, LM340, LM7805C,
LM7812C, LM7815C, LM7808C 0˚C to +125˚C
LM340A
Electrical Characteristics
I
OUT
= 1A, −55˚C ≤ TJ≤+150˚C (LM140A), or 0˚C ≤ TJ≤+ 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
V
O
Output Voltage TJ= 25˚C 4.9 5 5.1 11.75 12 12.25 14.7 15 15.3 V
P
D
≤ 15W, 5 mA ≤ IO≤ 1A 4.8 5.2 11.5 12.5 14.4 15.6 V
V
MIN
≤ VIN≤ V
MAX
(7.5 ≤ VIN≤ 20) (14.8 ≤ VIN≤ 27) (17.9 ≤ VIN≤ 30) V
∆V
O
Line Regulation IO= 500 mA 10 18 22 mV
∆V
IN
(7.5 ≤ VIN≤ 20) (14.8 ≤ VIN≤ 27) (17.9 ≤ VIN≤ 30) V
T
J
= 25˚C 3 10 4 18 4 22 mV
∆V
IN
(7.5 ≤ VIN≤ 20) (14.5 ≤ VIN≤ 27) (17.5 ≤ VIN≤ 30) V
T
J
= 25˚C 4 9 10 mV
Over Temperature 12 30 30 mV
∆V
IN
(8 ≤ VIN≤ 12) (16 ≤ VIN≤ 22) (20 ≤ VIN≤ 26) V
∆V
O
Load Regulation TJ= 25˚C 5 mA ≤ IO≤ 1.5A 10 25 12 32 12 35 mV
250 mA ≤ I
O
≤ 750 mA 15 19 21 mV
Over Temperature, 25 60 75 mV
5mA≤I
O
≤1A
I
Q
Quiescent Current TJ= 25˚C 6 6 6 mA
Over Temperature 6.5 6.5 6.5 mA
∆I
Q
Quiescent Current 5 mA ≤ IO≤ 1A 0.5 0.5 0.5 mA
Change T
J
= 25˚C, IO= 1A 0.8 0.8 0.8 mA
V
MIN
≤ VIN≤ V
MAX
(7.5 ≤ VIN≤ 20) (14.8 ≤ VIN≤ 27) (17.9 ≤ VIN≤ 30) V
I
O
= 500 mA 0.8 0.8 0.8 mA
V
MIN
≤ VIN≤ V
MAX
(8 ≤ VIN≤ 25) (15 ≤ VIN≤ 30) (17.9 ≤ VIN≤ 30) V
V
N
Output Noise Voltage TA= 25˚C, 10 Hz ≤ f ≤ 100 kHz 40 75 90 µV
Ripple Rejection TJ= 25˚C, f = 120 Hz, IO=1A 68 80 61 72 60 70 dB
or f = 120 Hz, I
O
= 500 mA, 68 61 60 dB
Over Temperature,
V
MIN
≤ VIN≤ V
MAX
(8 ≤ VIN≤ 18) (15 ≤ VIN≤ 25) (18.5 ≤ VIN≤ 28.5) V
R
O
Dropout Voltage TJ= 25˚C, IO= 1A 2.0 2.0 2.0 V
Output Resistance f = 1 kHz 8 18 19 mΩ
Short-Circuit Current T
J
= 25˚C 2.1 1.5 1.2 A
Peak Output Current T
J
= 25˚C 2.4 2.4 2.4 A
Average TC of V
O
Min, TJ= 0˚C, IO= 5 mA −0.6 −1.5 −1.8 mV/˚C
V
IN
Input Voltage TJ= 25˚C
Required to Maintain 7.5 14.5 17.5 V
Line Regulation
LM340/LM78MXX
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LM140
Electrical Characteristics
(Note 4)
−55˚C ≤ TJ≤ +150˚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
V
O
Output Voltage TJ= 25˚C, 5 mA ≤ IO≤ 1A 4.8 5 5.2 11.5 12 12.5 14.4 15 15.6 V
P
D
≤ 15W, 5 mA ≤ IO≤ 1A 4.75 5.25 11.4 12.6 14.25 15.75 V
V
MIN
≤ VIN≤ V
MAX
(8 ≤ VIN≤ 20) (15.5 ≤ VIN≤ 27) (18.5 ≤ VIN≤ 30) V
∆V
O
Line Regulation IO= 500 mA TJ= 25˚C 3 50 4 120 4 150 mV
∆V
IN
(7 ≤ VIN≤ 25) (14.5 ≤ VIN≤ 30) (17.5 ≤ VIN≤ 30) V
−55˚C ≤ T
J
≤ +150˚C 50 120 150 mV
∆V
IN
(8 ≤ VIN≤ 20) (15 ≤ VIN≤ 27) (18.5 ≤ VIN≤ 30) V
I
O
≤ 1A TJ= 25˚C 50 120 150 mV
∆V
IN
(7.5 ≤ VIN≤ 20) (14.6 ≤ VIN≤ 27) (17.7 ≤ VIN≤ 30) V
−55˚C ≤ T
J
≤ +150˚C 25 60 75 mV
∆V
IN
(8 ≤ VIN≤ 12) (16 ≤ VIN≤ 22) (20 ≤ VIN≤ 26) V
∆V
O
Load Regulation TJ= 25˚C 5 mA ≤ IO≤ 1.5A 10 50 12 120 12 150 mV
250 mA ≤ I
P
≤ 750 mA 25 60 75 mV
−55˚C ≤ T
J
≤ +150˚C, 50 120 150 mV
5mA≤I
O
≤1A
I
Q
Quiescent Current IO≤ 1A TJ= 25˚C 6 6 6 mA
−55˚C ≤ T
J
≤ +150˚C 7 7 7 mA
∆I
Q
Quiescent Current 5 mA ≤ IO≤ 1A 0.5 0.5 0.5 mA
Change T
J
= 25˚C, IO≤ 1A 0.8 0.8 0.8 mA
V
MIN
≤ VIN≤ V
MAX
(8 ≤ VIN≤ 20) (15 ≤ VIN≤ 27) (18.5 ≤ VIN≤ 30) V
I
O
= 500 mA, −55˚C ≤ TJ≤ +150˚C 0.8 0.8 0.8 mA
V
MIN
≤ VIN≤ V
MAX
(8 ≤ VIN≤ 25) (15 ≤ VIN≤ 30) (18.5 ≤ VIN≤ 30) V
V
N
Output Noise Voltage TA= 25˚C, 10 Hz ≤ f ≤ 100 kHz 40 75 90 µV
Ripple Rejection IO≤ 1A, TJ= 25˚C or 68 80 61 72 60 70 dB
f = 120 Hz I
O
≤ 500 mA, 68 61 60 dB
−55˚C ≤ T
J
≤+150˚C
V
MIN
≤ VIN≤ V
MAX
(8 ≤ VIN≤ 18) (15 ≤ VIN≤ 25) (18.5 ≤ VIN≤ 28.5) V
R
O
Dropout Voltage TJ= 25˚C, IO= 1A 2.0 2.0 2.0 V
Output Resistance f = 1 kHz 8 18 19 mΩ
Short-Circuit Current T
J
= 25˚C 2.1 1.5 1.2 A
Peak Output Current T
J
= 25˚C 2.4 2.4 2.4 A
Average TC of V
OUT
0˚C ≤ TJ≤ +150˚C, IO= 5 mA −0.6 −1.5 −1.8 mV/˚C
V
IN
Input Voltage TJ= 25˚C, IO≤ 1A
Required to Maintain 7.5 14.6 17.7 V
Line Regulation
LM340/LM78MXX
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LM340/LM7800C
Electrical Characteristics
(Note 4)
0˚C ≤ TJ≤ +125˚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
V
O
Output Voltage TJ= 25˚C, 5 mA ≤ IO≤ 1A 4.8 5 5.2 11.5 12 12.5 14.4 15 15.6 V
P
D
≤ 15W, 5 mA ≤ IO≤ 1A 4.75 5.25 11.4 12.6 14.25 15.75 V
V
MIN
≤ VIN≤ V
MAX
(7.5 ≤ VIN≤ 20) (14.5 ≤ VIN≤ 27) (17.5 ≤ VIN≤ 30) V
∆V
O
Line Regulation IO= 500 mA TJ= 25˚C 3 50 4 120 4 150 mV
∆V
IN
(7 ≤ VIN≤ 25) (14.5 ≤ VIN≤ 30) (17.5 ≤ VIN≤ 30) V
0˚C ≤ T
J
≤ +125˚C 50 120 150 mV
∆V
IN
(8 ≤ VIN≤ 20) (15 ≤ VIN≤ 27) (18.5 ≤ VIN≤ 30) V
I
O
≤ 1A TJ= 25˚C 50 120 150 mV
∆V
IN
(7.5 ≤ VIN≤ 20) (14.6 ≤ VIN≤ 27) (17.7 ≤ VIN≤ 30) V
0˚C ≤ T
J
≤ +125˚C 25 60 75 mV
∆V
IN
(8 ≤ VIN≤ 12) (16 ≤ VIN≤ 22) (20 ≤ VIN≤ 26) V
∆V
O
Load Regulation TJ= 25˚C 5 mA ≤ IO≤ 1.5A 10 50 12 120 12 150 mV
250 mA ≤ I
O
≤ 750 mA 25 60 75 mV
5mA≤I
O
≤1A, 0˚C ≤ TJ≤ +125˚C 50 120 150 mV
I
Q
Quiescent Current IO≤ 1A TJ= 25˚C 8 8 8 mA
0˚C ≤ T
J
≤ +125˚C 8.5 8.5 8.5 mA
∆I
Q
Quiescent Current 5 mA ≤ IO≤ 1A 0.5 0.5 0.5 mA
Change T
J
= 25˚C, IO≤ 1A 1.0 1.0 1.0 mA
V
MIN
≤ VIN≤ V
MAX
(7.5 ≤ VIN≤ 20) (14.8 ≤ VIN≤ 27) (17.9 ≤ VIN≤ 30) V
I
O
≤ 500 mA, 0˚C ≤ TJ≤ +125˚C 1.0 1.0 1.0 mA
V
MIN
≤ VIN≤ V
MAX
(7 ≤ VIN≤ 25) (14.5 ≤ VIN≤ 30) (17.5 ≤ VIN≤ 30) V
V
N
Output Noise Voltage TA= 25˚C, 10 Hz ≤ f ≤ 100 kHz 40 75 90 µV
Ripple Rejection IO≤ 1A, TJ= 25˚C 62 80 55 72 54 70 dB
f = 120 Hz or I
O
≤ 500 mA, 62 55 54 dB
0˚C ≤ T
J
≤ +125˚C
V
MIN
≤ VIN≤ V
MAX
(8 ≤ VIN≤ 18) (15 ≤ VIN≤ 25) (18.5 ≤ VIN≤
28.5)
V
R
O
Dropout Voltage TJ= 25˚C, IO= 1A 2.0 2.0 2.0 V
Output Resistance f = 1 kHz 8 18 19 mΩ
Short-Circuit Current T
J
= 25˚C 2.1 1.5 1.2 A
Peak Output Current T
J
= 25˚C 2.4 2.4 2.4 A
Average TC of V
OUT
0˚C ≤ TJ≤ +125˚C, IO= 5 mA −0.6 −1.5 −1.8 mV/˚C
V
IN
Input Voltage TJ= 25˚C, IO≤ 1A
Required to Maintain 7.5 14.6 17.7 V
Line Regulation
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Conditions are conditions under which the device functions
but the specifications might not be guaranteed. For guaranteed specifications and test conditions see the Electrical Characteristics.
Note 2: The maximum allowable power dissipation at any ambient temperature is a function of the maximum junction temperature for operation (T
JMAX
= 125˚C or
150˚C), the junction-to-ambient thermal resistance (θ
JA
), and the ambient temperature (TA). P
DMAX
=(T
JMAX−TA
)/θJA. If this dissipation is exceeded, the die tem-
perature will rise above T
JMAX
and the electrical specifications do not apply. If the die temperature rises above 150˚C, the device will go into thermal shutdown. For
the TO-3 package (K, KC), the junction-to-ambient thermal resistance (θ
JA
) is 39˚C/W. When using a heatsink, θJAis the sum of the 4˚C/W junction-to-case thermal
resistance (θ
JC
) of the TO-3 package and the case-to-ambient thermal resistance of the heatsink. For the TO-220 package (T), θJAis 54˚C/W and θJCis 4˚C/W. If
SOT-223 is used, the junction-to-ambient thermal resistance is 174˚C/W and can be reduced by a heatsink (see Applications Hints on heatsinking).
If the TO-263 package is used, the thermal resistance can be reduced by increasing the PC board copper area thermally connected to the package: Using 0.5 square
inches of copper area, θ
JA
is 50˚C/W; with 1 square inch of copper area, θJAis 37˚C/W; and with 1.6 or more inches of copper area, θJAis 32˚C/W.
Note 3: ESD rating is based on the human body model, 100 pF discharged through 1.5 kΩ.
Note 4: All characteristics are measured with a 0.22 µF capacitor from input to ground and a 0.1 µF capacitor from output to ground. All characteristics except noise
voltage and ripple rejection ratio are measured using pulse techniques (t
w
≤ 10 ms, duty cycle ≤ 5%). Output voltage changes due to changes in internal temperature
must be taken into account separately.
Note 5: A military RETS specification is available on request. At the time of printing, the military RETS specifications for the LM140AK-5.0/883, LM140AK-12/883,
and LM140AK-15/883 complied with the min and max limits for the respective versions of the LM140A. At the time of printing, the military RETS specifications for
the LM140K-5.0/883, LM140K-12/883, and LM140K-15/883 complied with the min and max limits for the respective versions of the LM140. The LM140H/883,
LM140K/883, and LM140AK/883 may also be procured as a Standard Military Drawing.
LM340/LM78MXX
www.national.com 4
LM7808C
Electrical Characteristics
0˚C ≤ TJ≤ +150˚C, VI= 14V, IO= 500 mA, CI= 0.33 µF, CO= 0.1 µF, unless otherwise specified
Symbol Parameter Conditions (Note 6) LM7808C Units
Min Typ Max
V
O
Output Voltage TJ= 25˚C 7.7 8.0 8.3 V
∆V
O
Line Regulation TJ= 25˚C 10.5V ≤ VI≤ 25V 6.0 160 mV
11.0V ≤ V
I
≤ 17V 2.0 80
∆V
O
Load Regulation TJ= 25˚C 5.0 mA ≤ IO≤ 1.5A 12 160 mV
250 mA ≤ I
O
≤ 750
mA
4.0 80
V
O
Output Voltage 11.5V ≤ VI≤ 23V, 5.0 mA ≤ IO≤ 1.0A, P ≤ 15W 7.6 8.4 V
I
Q
Quiescent
Current
TJ= 25˚C 4.3 8.0 mA
∆I
Q
Quiescent With Line 11.5V ≤ VI≤ 25V 1.0 mA
Current Change
With
Load
5.0 mA ≤ I
O
≤ 1.0A 0.5
V
N
Noise TA= 25˚C, 10 Hz ≤ f ≤ 100 kHz 52 µV
∆V
I
/∆VORipple Rejection f = 120 Hz, IO= 350 mA, TJ= 25˚C 56 72 dB
V
DO
Dropout Voltage IO= 1.0A, TJ= 25˚C 2.0 V
R
O
Output Resistance f = 1.0 kHz 16 mΩ
I
OS
Output Short Circuit Current TJ= 25˚C, VI= 35V 0.45 A
I
PK
Peak Output Current TJ= 25˚C 2.2 A
∆V
O
/∆T Average Temperature IO= 5.0 mA 0.8 mV/˚C
Coefficient of Output Voltage
Note 6: All characteristics are measured with a 0.22 µF capacitor from input to ground and a 0.1 µF capacitor from output to ground. All characteristics except noise
voltage and ripple rejection ratio are measured using pulse techniques (t
w
≤ 10 ms, duty cycle ≤ 5%). Output voltage changes due to changes in internal temperature
must be taken into account separately.
Typical Performance Characteristics
Maximum Average Power
Dissipation
DS007781-22
Maximum Average Power
Dissipation
DS007781-23
Maximum Power
Dissipation (TO-263)
(See Note 2)
DS007781-24
LM340/LM78MXX
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