NSC LM340K-5.0, LM340K-15, LM340G-5MWC, LM340T-15, LM340T-12 Datasheet
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February 2000
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, 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) 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
nComplete specifications at 1A load
nOutput voltage tolerances of ±2% at Tj = 25ÊC and ±4% over the temperature range (LM340A)
n Line regulation of 0.01% of VOUT/V of VIN at 1A load (LM340A)
nLoad regulation of 0.3% of VOUT/A (LM340A)
nInternal thermal overload protection
nInternal short-circuit current limit
nOutput transistor safe area protection
nP+ Product Enhancement tested
Device |
Output |
Packages |
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Voltages |
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LM140 |
5, 12, |
TO-3 (K) |
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15 |
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LM340A/LM340 |
5, 12, |
TO-3 (K), TO-220 (T), |
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15 |
SOT-223 (MP), TO-263 (S) |
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(5V and 12V only) |
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LM7800C |
5, 8, 12, |
TO-220 (T) |
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15 |
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Typical Applications
Fixed Output Regulator |
Adjustable Output Regulator |
DS007781-1 |
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*Required if the regulator is located far from the power supply filter. |
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**Although no output capacitor is needed for stability, it does help transient |
DS007781-2 |
response. (If needed, use 0.1 µF, ceramic disc). |
> 3 IQ, |
VOUT = 5V + (5V/R1 + IQ) R2 5V/R1 |
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load regulation (Lr) ≈ [(R1 + R2)/R1] (Lr of LM340-5). |
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Current Regulator |
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Comparison between SOT-223 and D-Pak (TO-252) |
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Packages |
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DS007781-3 |
IQ = 1.3 mA over line and load changes. |
DS007781-38 |
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Scale 1:1 |
Regulators Positive Terminal-3 Series LM340/LM78MXX
© 2000 National Semiconductor Corporation |
DS007781 |
www.national.com |
LM340/LM78MXX
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 |
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All Devices except |
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LM7824/LM7824C |
35V |
LM7824/LM7824C |
40V |
Internal Power Dissipation (Note 2) |
Internally Limited |
Maximum Junction Temperature |
150ÊC |
Storage Temperature Range |
−65ÊC to +150ÊC |
Lead Temperature (Soldering, 10 sec.) |
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TO-3 Package (K) |
300ÊC |
TO-220 Package (T), TO-263 |
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Package (S) |
230ÊC |
ESD Susceptibility (Note 3) |
2 kV |
Operating Conditions (Note 1)
Temperature Range (TA) (Note 2) |
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LM140A, LM140 |
−55ÊC to +125ÊC |
LM340A, LM340, LM7805C, |
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LM7812C, LM7815C, LM7808C |
0ÊC to +125ÊC |
LM340A
Electrical Characteristics
IOUT= 1A, −55ÊC ≤ TJ≤+150ÊC (LM140A), or 0ÊC ≤ TJ≤+ 125ÊC (LM340A) unless otherwise specified (Note 4)
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Output Voltage |
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5V |
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12V |
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15V |
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Symbol |
Input Voltage (unless otherwise noted) |
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10V |
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19V |
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23V |
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Units |
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Parameter |
Conditions |
Min |
Typ |
Max |
Min |
Typ |
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Max |
Min |
Typ |
Max |
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VO |
Output Voltage |
TJ = 25ÊC |
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4.9 |
5 |
5.1 |
11.75 |
12 |
12.25 |
14.7 |
15 |
15.3 |
V |
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PD ≤ 15W, 5 mA ≤ IO ≤ 1A |
4.8 |
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5.2 |
11.5 |
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12.5 |
14.4 |
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15.6 |
V |
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VMIN ≤ VIN ≤ VMAX |
(7.5 ≤ VIN ≤ 20) |
(14.8 ≤ VIN ≤ 27) |
(17.9 ≤ VIN ≤ 30) |
V |
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VO |
Line Regulation |
IO = 500 mA |
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10 |
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18 |
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22 |
mV |
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VIN |
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(7.5 ≤ VIN ≤ 20) |
(14.8 ≤ VIN ≤ 27) |
(17.9 ≤ VIN ≤ 30) |
V |
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TJ = 25ÊC |
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3 |
10 |
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4 |
18 |
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4 |
22 |
mV |
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VIN |
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(7.5 ≤ VIN ≤ 20) |
(14.5 ≤ VIN ≤ 27) |
(17.5 ≤ VIN ≤ 30) |
V |
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TJ = 25ÊC |
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4 |
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9 |
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10 |
mV |
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Over Temperature |
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12 |
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30 |
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30 |
mV |
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VIN |
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(8 ≤ VIN ≤ 12) |
(16 ≤ VIN ≤ 22) |
(20 ≤ VIN ≤ 26) |
V |
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VO |
Load Regulation |
TJ = 25ÊC |
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5 mA ≤ IO ≤ 1.5A |
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10 |
25 |
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12 |
32 |
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12 |
35 |
mV |
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250 mA ≤ IO ≤ 750 mA |
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15 |
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19 |
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21 |
mV |
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Over Temperature, |
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25 |
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60 |
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75 |
mV |
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5 mA ≤ IO ≤ 1A |
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IQ |
Quiescent Current |
TJ = 25ÊC |
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6 |
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6 |
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6 |
mA |
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Over Temperature |
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6.5 |
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6.5 |
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6.5 |
mA |
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IQ |
Quiescent Current |
5 mA ≤ IO ≤ 1A |
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0.5 |
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0.5 |
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0.5 |
mA |
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Change |
TJ = 25ÊC, IO = 1A |
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0.8 |
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0.8 |
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0.8 |
mA |
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VMIN ≤ VIN ≤ VMAX |
(7.5 ≤ VIN ≤ 20) |
(14.8 ≤ VIN ≤ 27) |
(17.9 ≤ VIN ≤ 30) |
V |
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IO = 500 mA |
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0.8 |
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0.8 |
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0.8 |
mA |
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VMIN ≤ VIN ≤ VMAX |
(8 ≤ VIN ≤ 25) |
(15 ≤ VIN ≤ 30) |
(17.9 ≤ VIN ≤ 30) |
V |
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VN |
Output Noise Voltage |
TA = 25ÊC, 10 Hz ≤ f ≤ 100 kHz |
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40 |
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75 |
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90 |
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µV |
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Ripple Rejection |
TJ = 25ÊC, f = 120 Hz, IO = 1A |
68 |
80 |
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61 |
72 |
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60 |
70 |
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dB |
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or f = 120 Hz, IO = 500 mA, |
68 |
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61 |
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60 |
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dB |
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Over Temperature, |
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VMIN ≤ VIN ≤ VMAX |
(8 ≤ VIN ≤ 18) |
(15 ≤ VIN ≤ 25) |
(18.5 ≤ VIN ≤ 28.5) |
V |
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RO |
Dropout Voltage |
TJ = 25ÊC, IO = 1A |
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2.0 |
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2.0 |
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2.0 |
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V |
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Output Resistance |
f = 1 kHz |
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8 |
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18 |
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19 |
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mΩ |
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Short-Circuit Current |
TJ = 25ÊC |
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2.1 |
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1.5 |
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1.2 |
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A |
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Peak Output Current |
TJ = 25ÊC |
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2.4 |
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2.4 |
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2.4 |
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A |
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Average TC of VO |
Min, TJ = 0ÊC, IO = 5 mA |
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−0.6 |
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−1.5 |
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−1.8 |
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mV/ÊC |
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VIN |
Input Voltage |
TJ = 25ÊC |
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Required to Maintain |
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7.5 |
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14.5 |
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17.5 |
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V |
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Line Regulation |
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www.national.com |
2 |
LM140
Electrical Characteristics (Note 4)
−55ÊC |
≤ TJ ≤ +150ÊC unless otherwise specified |
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Output Voltage |
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5V |
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12V |
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15V |
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Symbol |
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Input Voltage (unless otherwise noted) |
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10V |
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19V |
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23V |
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Units |
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Parameter |
Conditions |
Min |
Typ |
Max |
Min |
Typ |
Max |
Min |
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Typ |
Max |
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VO |
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Output Voltage |
TJ = 25ÊC, 5 mA ≤ IO ≤ 1A |
4.8 |
5 |
5.2 |
11.5 |
12 |
12.5 |
14.4 |
15 |
15.6 |
V |
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PD ≤ 15W, 5 mA ≤ IO ≤ 1A |
4.75 |
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5.25 |
11.4 |
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12.6 |
14.25 |
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15.75 |
V |
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VMIN ≤ VIN ≤ VMAX |
(8 ≤ VIN ≤ 20) |
(15.5 ≤ VIN ≤ 27) |
(18.5 ≤ VIN ≤ 30) |
V |
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VO |
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Line Regulation |
IO = 500 mA |
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TJ = 25ÊC |
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3 |
50 |
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4 |
120 |
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4 |
150 |
mV |
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VIN |
(7 ≤ VIN ≤ 25) |
(14.5 ≤ VIN ≤ 30) |
(17.5 ≤ VIN ≤ 30) |
V |
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−55ÊC ≤ TJ ≤ +150ÊC |
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50 |
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120 |
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150 |
mV |
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VIN |
(8 ≤ VIN ≤ 20) |
(15 ≤ VIN ≤ 27) |
(18.5 ≤ VIN ≤ 30) |
V |
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IO ≤ 1A |
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TJ = 25ÊC |
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50 |
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120 |
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150 |
mV |
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VIN |
(7.5 ≤ VIN ≤ 20) |
(14.6 ≤ VIN ≤ 27) |
(17.7 ≤ VIN ≤ 30) |
V |
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−55ÊC ≤ TJ ≤ +150ÊC |
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25 |
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60 |
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75 |
mV |
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VIN |
(8 ≤ VIN ≤ 12) |
(16 ≤ VIN ≤ 22) |
(20 ≤ VIN ≤ 26) |
V |
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VO |
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Load Regulation |
TJ = 25ÊC |
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5 mA ≤ IO ≤ 1.5A |
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10 |
50 |
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12 |
120 |
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12 |
150 |
mV |
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250 mA ≤ IP ≤ 750 mA |
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25 |
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60 |
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75 |
mV |
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−55ÊC ≤ TJ ≤ +150ÊC, |
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50 |
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120 |
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150 |
mV |
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5 mA ≤ IO ≤ 1A |
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IQ |
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Quiescent Current |
IO ≤ 1A |
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TJ = 25ÊC |
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6 |
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6 |
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6 |
mA |
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−55ÊC ≤ TJ ≤ +150ÊC |
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7 |
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7 |
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7 |
mA |
IQ |
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Quiescent Current |
5 mA ≤ IO ≤ 1A |
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0.5 |
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0.5 |
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0.5 |
mA |
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Change |
TJ = 25ÊC, IO ≤ 1A |
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0.8 |
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0.8 |
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0.8 |
mA |
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VMIN ≤ VIN ≤ VMAX |
(8 ≤ VIN ≤ 20) |
(15 ≤ VIN ≤ 27) |
(18.5 ≤ VIN ≤ 30) |
V |
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IO = 500 mA, −55ÊC ≤ TJ ≤ +150ÊC |
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0.8 |
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0.8 |
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0.8 |
mA |
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VMIN ≤ VIN ≤ VMAX |
(8 ≤ VIN ≤ 25) |
(15 ≤ VIN ≤ 30) |
(18.5 ≤ VIN ≤ 30) |
V |
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VN |
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Output Noise Voltage |
TA = 25ÊC, 10 Hz ≤ f ≤ 100 kHz |
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40 |
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75 |
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90 |
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µV |
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Ripple Rejection |
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IO ≤ 1A, TJ = 25ÊC or |
68 |
80 |
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61 |
72 |
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60 |
70 |
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dB |
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f = 120 Hz |
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IO ≤ 500 mA, |
68 |
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61 |
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60 |
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dB |
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−55ÊC ≤ TJ ≤+150ÊC |
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VMIN ≤ VIN ≤ VMAX |
(8 ≤ VIN ≤ 18) |
(15 ≤ VIN ≤ 25) |
(18.5 ≤ VIN ≤ 28.5) |
V |
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RO |
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Dropout Voltage |
TJ = 25ÊC, IO = 1A |
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2.0 |
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2.0 |
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2.0 |
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V |
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Output Resistance |
f = 1 kHz |
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8 |
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18 |
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19 |
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mΩ |
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Short-Circuit Current |
TJ = 25ÊC |
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2.1 |
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1.5 |
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1.2 |
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A |
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Peak Output Current |
TJ = 25ÊC |
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2.4 |
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2.4 |
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2.4 |
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A |
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Average TC of VOUT |
0ÊC ≤ TJ ≤ +150ÊC, IO = 5 mA |
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−0.6 |
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−1.5 |
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−1.8 |
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mV/ÊC |
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VIN |
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Input Voltage |
TJ = 25ÊC, IO ≤ 1A |
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Required to Maintain |
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7.5 |
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14.6 |
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17.7 |
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V |
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Line Regulation |
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LM340/LM78MXX
3 |
www.national.com |
LM340/LM78MXX
LM340/LM7800C
Electrical Characteristics (Note 4)
0ÊC ≤ TJ ≤ +125ÊC unless otherwise specified
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Output Voltage |
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5V |
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12V |
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15V |
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Symbol |
Input Voltage (unless otherwise noted) |
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10V |
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19V |
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23V |
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Units |
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Parameter |
Conditions |
Min |
Typ |
Max |
Min |
Typ |
Max |
Min |
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Typ |
Max |
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VO |
Output Voltage |
TJ = 25ÊC, 5 mA ≤ IO ≤ 1A |
4.8 |
5 |
5.2 |
11.5 |
12 |
12.5 |
14.4 |
15 |
15.6 |
V |
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PD ≤ 15W, 5 mA ≤ IO ≤ 1A |
4.75 |
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5.25 |
11.4 |
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12.6 |
14.25 |
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15.75 |
V |
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VMIN ≤ VIN ≤ VMAX |
(7.5 ≤ VIN ≤ 20) |
(14.5 ≤ VIN ≤ 27) |
(17.5 ≤ VIN ≤ 30) |
V |
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VO |
Line Regulation |
IO = 500 mA |
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TJ = 25ÊC |
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3 |
50 |
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4 |
120 |
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4 |
150 |
mV |
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VIN |
(7 ≤ VIN ≤ 25) |
(14.5 ≤ VIN ≤ 30) |
(17.5 ≤ VIN ≤ 30) |
V |
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0ÊC ≤ TJ ≤ +125ÊC |
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50 |
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120 |
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150 |
mV |
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VIN |
(8 ≤ VIN ≤ 20) |
(15 ≤ VIN ≤ 27) |
(18.5 ≤ VIN ≤ 30) |
V |
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IO ≤ 1A |
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TJ = 25ÊC |
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50 |
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120 |
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150 |
mV |
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VIN |
(7.5 ≤ VIN ≤ 20) |
(14.6 ≤ VIN ≤ 27) |
(17.7 ≤ VIN ≤ 30) |
V |
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0ÊC ≤ TJ ≤ +125ÊC |
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25 |
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60 |
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75 |
mV |
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VIN |
(8 ≤ VIN ≤ 12) |
(16 ≤ VIN ≤ 22) |
(20 ≤ VIN ≤ 26) |
V |
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VO |
Load Regulation |
TJ = 25ÊC |
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5 mA ≤ IO ≤ 1.5A |
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10 |
50 |
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12 |
120 |
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12 |
150 |
mV |
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250 mA ≤ IO ≤ 750 mA |
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25 |
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60 |
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75 |
mV |
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5 mA ≤ IO ≤ 1A, 0ÊC ≤ TJ ≤ +125ÊC |
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50 |
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120 |
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150 |
mV |
||
IQ |
Quiescent Current |
IO ≤ 1A |
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TJ = 25ÊC |
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8 |
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8 |
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8 |
mA |
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0ÊC ≤ TJ ≤ +125ÊC |
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8.5 |
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8.5 |
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8.5 |
mA |
IQ |
Quiescent Current |
5 mA ≤ IO ≤ 1A |
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0.5 |
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0.5 |
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0.5 |
mA |
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Change |
TJ = 25ÊC, IO ≤ 1A |
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1.0 |
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1.0 |
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1.0 |
mA |
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VMIN ≤ VIN ≤ VMAX |
(7.5 ≤ VIN ≤ 20) |
(14.8 ≤ VIN ≤ 27) |
(17.9 ≤ VIN ≤ 30) |
V |
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IO ≤ 500 mA, 0ÊC ≤ TJ ≤ +125ÊC |
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1.0 |
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1.0 |
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1.0 |
mA |
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VMIN ≤ VIN ≤ VMAX |
(7 ≤ VIN ≤ 25) |
(14.5 ≤ VIN ≤ 30) |
(17.5 ≤ VIN ≤ 30) |
V |
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VN |
Output Noise Voltage |
TA = 25ÊC, 10 Hz ≤ f ≤ 100 kHz |
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40 |
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75 |
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90 |
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µV |
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Ripple Rejection |
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IO ≤ 1A, TJ = 25ÊC |
62 |
80 |
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55 |
72 |
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54 |
70 |
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dB |
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f = 120 Hz |
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or IO ≤ 500 mA, |
62 |
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55 |
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54 |
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dB |
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0ÊC ≤ TJ ≤ +125ÊC |
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VMIN ≤ VIN ≤ VMAX |
(8 ≤ VIN ≤ 18) |
(15 ≤ VIN ≤ 25) |
(18.5 ≤ VIN ≤ |
V |
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28.5) |
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RO |
Dropout Voltage |
TJ = 25ÊC, IO = 1A |
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2.0 |
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2.0 |
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2.0 |
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V |
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Output Resistance |
f = 1 kHz |
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8 |
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18 |
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19 |
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mΩ |
||
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Short-Circuit Current |
TJ = 25ÊC |
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2.1 |
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1.5 |
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1.2 |
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A |
||
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Peak Output Current |
TJ = 25ÊC |
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2.4 |
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2.4 |
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2.4 |
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A |
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Average TC of VOUT |
0ÊC ≤ TJ ≤ +125ÊC, IO = 5 mA |
|
−0.6 |
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−1.5 |
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−1.8 |
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mV/ÊC |
|||
VIN |
Input Voltage |
TJ = 25ÊC, IO ≤ 1A |
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Required to Maintain |
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7.5 |
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14.6 |
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17.7 |
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V |
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Line Regulation |
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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 (TJMAX = 125ÊC or
150ÊC), the junction-to-ambient thermal resistance (θJA), and the ambient temperature (TA). PDMAX = (TJMAX − T A)/θJA. If this dissipation is exceeded, the die temperature will rise above TJMAX and the electrical specifications do not apply. If the die temperature rises above 150ÊC, the device will go into thermal shutdown. For
the TO-3 package (K, KC), the junction-to-ambient thermal resistance (θJA) is 39ÊC/W. When using a heatsink, θJA is the sum of the 4ÊC/W junction-to-case thermal resistance (θJC) of the TO-3 package and the case-to-ambient thermal resistance of the heatsink. For the TO-220 package (T), θJA is 54ÊC/W and θJC is 4ÊC/W. If SOT-223 is used, the junction-to-ambient thermal resistance is 174ÊC/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, θJA is 50ÊC/W; with 1 square inch of copper area, θJAis 37ÊC/W; and with 1.6 or more inches of copper area, θJA is 32ÊC/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 (tw ≤ 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.
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4 |
LM7808C
Electrical Characteristics
0ÊC ≤ TJ ≤ +150ÊC, VI = 14V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF, unless otherwise specified
Symbol |
Parameter |
|
Conditions (Note 6) |
|
LM7808C |
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Units |
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Min |
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Typ |
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Max |
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VO |
Output Voltage |
|
TJ = 25ÊC |
|
7.7 |
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8.0 |
|
8.3 |
V |
|
VO |
Line Regulation |
|
TJ = 25ÊC |
10.5V ≤ VI ≤ 25V |
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|
6.0 |
|
160 |
mV |
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11.0V ≤ VI ≤ 17V |
|
|
2.0 |
|
80 |
|
VO |
Load Regulation |
|
TJ = 25ÊC |
5.0 mA ≤ IO ≤ 1.5A |
|
|
12 |
|
160 |
mV |
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250 mA ≤ IO ≤ 750 |
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4.0 |
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80 |
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mA |
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VO |
Output Voltage |
|
11.5V ≤ VI ≤ 23V, 5.0 mA ≤ IO ≤ 1.0A, P ≤ 15W |
7.6 |
|
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|
8.4 |
V |
||
IQ |
Quiescent |
|
TJ = 25ÊC |
|
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|
4.3 |
|
8.0 |
mA |
|
|
Current |
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IQ |
Quiescent |
|
With Line |
11.5V ≤ VI ≤ 25V |
|
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|
1.0 |
mA |
|
Current Change |
|
With |
5.0 mA ≤ IO ≤ 1.0A |
|
|
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0.5 |
|
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|
Load |
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VN |
Noise |
|
TA = 25ÊC, 10 Hz ≤ f ≤ 100 kHz |
|
|
52 |
|
|
µV |
||
VI/ VO |
Ripple Rejection |
|
f = 120 Hz, IO = 350 mA, TJ = 25ÊC |
56 |
|
72 |
|
|
dB |
||
VDO |
Dropout Voltage |
|
IO = 1.0A, TJ = 25ÊC |
|
|
|
2.0 |
|
|
V |
|
RO |
Output Resistance |
|
f = 1.0 kHz |
|
|
|
16 |
|
|
mΩ |
|
IOS |
Output Short Circuit Current |
TJ = 25ÊC, VI = 35V |
|
|
|
0.45 |
|
|
A |
||
IPK |
Peak Output Current |
|
TJ = 25ÊC |
|
|
|
2.2 |
|
|
A |
|
VO/ T |
Average Temperature |
IO = 5.0 mA |
|
|
|
0.8 |
|
|
mV/ÊC |
||
|
Coefficient of Output Voltage |
|
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|
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 (tw ≤ 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 |
Maximum Average Power |
Maximum Power |
Dissipation |
Dissipation |
Dissipation (TO-263) |
|
|
(See Note 2) |
DS007781-22 |
DS007781-23 |
DS007781-24
LM340/LM78MXX
5 |
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