LM7805CK [NSC]
Series Voltage Regulators; 系列稳压器
| 型号： | LM7805CK |
| 厂家： | 
National Semiconductor |
| 描述： | Series Voltage Regulators |
| 文件： | 总8页 (文件大小：150K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
May 2000
LM78XX
Series Voltage Regulators
put, 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.
General Description
The LM78XX series of three terminal regulators is available
with several fixed output voltages making them useful in a
wide range of applications. One of these is local on card
regulation, eliminating the distribution problems associated
with single point regulation. The voltages available allow
these regulators to be used in logic systems, instrumenta-
tion, HiFi, and other solid state electronic equipment. Al-
though designed primarily as fixed voltage regulators these
devices can be used with external components to obtain ad-
justable voltages and currents.
For output voltage other than 5V, 12V and 15V the LM117
series provides an output voltage range from 1.2V to 57V.
Features
n Output current in excess of 1A
n Internal thermal overload protection
n No external components required
n Output transistor safe area protection
n Internal short circuit current limit
n Available in the aluminum TO-3 package
The LM78XX series is available in an aluminum TO-3 pack-
age which will allow over 1.0A load current if adequate heat
sinking is provided. 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 dissi-
pation. If internal power dissipation becomes too high for the
heat sinking provided, the thermal shutdown circuit takes
over preventing the IC from overheating.
Voltage Range
LM7805C
LM7812C
LM7815C
5V
12V
15V
Considerable effort was expanded to make the LM78XX se-
ries of regulators easy to use and minimize the number of
external components. It is not necessary to bypass the out-
Connection Diagrams
Metal Can Package
TO-3 (K)
Plastic Package
TO-220 (T)
Aluminum
DS007746-3
DS007746-2
Top View
Bottom View
Order Number LM7805CT,
LM7812CT or LM7815CT
See NS Package Number T03B
Order Number LM7805CK,
LM7812CK or LM7815CK
See NS Package Number KC02A
© 2000 National Semiconductor Corporation
DS007746
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Schematic
DS007746-1
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2
Absolute Maximum Ratings (Note 3)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Maximum Junction Temperature
(K Package)
150˚C
150˚C
(T Package)
Storage Temperature Range
Lead Temperature (Soldering, 10 sec.)
TO-3 Package K
−65˚C to +150˚C
Input Voltage
300˚C
230˚C
(VO = 5V, 12V and 15V)
35V
Internally Limited
0˚C to +70˚C
TO-220 Package T
Internal Power Dissipation (Note 1)
Operating Temperature Range (TA)
Electrical Characteristics LM78XXC (Note 2)
0˚C ≤ TJ ≤ 125˚C unless otherwise noted.
Output Voltage
5V
12V
19V
15V
23V
Input Voltage (unless otherwise noted)
10V
Units
Symbol
Parameter
Conditions
Tj = 25˚C, 5 mA ≤ IO ≤ 1A
PD ≤ 15W, 5 mA ≤ IO ≤ 1A
VMIN ≤ VIN ≤ VMAX
Min Typ Max Min Typ Max Min Typ Max
VO
Output Voltage
4.8
5
5.2 11.5 12 12.5 14.4 15 15.6
V
V
V
4.75
5.25 11.4
12.6 14.25
15.75
(7.5 ≤ VIN ≤ 20)
50
(7 ≤ VIN ≤ 25)
(14.5 ≤ VIN
≤
(17.5 ≤ VIN
≤
27)
30)
∆VO
Line Regulation
IO = 500
mA
Tj = 25˚C
3
4
120
4
150
mV
V
∆VIN
14.5 ≤ VIN ≤ 30)
(17.5 ≤ VIN
≤
30)
0˚C ≤ Tj ≤ +125˚C
∆VIN
50
(8 ≤ VIN ≤ 20)
120
150
mV
V
(15 ≤ VIN ≤ 27)
(18.5 ≤ VIN
≤
30)
IO ≤ 1A
Tj = 25˚C
50
120
150
mV
V
∆VIN
(7.5 ≤ VIN ≤ 20)
(14.6 ≤ VIN
≤
(17.7 ≤ VIN
≤
27)
30)
0˚C ≤ Tj ≤ +125˚C
∆VIN
25
60
75
mV
V
(8 ≤ VIN ≤ 12)
(16 ≤ VIN ≤ 22)
12 120
60
(20 ≤ VIN ≤ 26)
12 150
75
∆VO
Load Regulation
Tj = 25˚C
5 mA ≤ IO ≤ 1.5A
10
50
25
mV
mV
250 mA ≤ IO
≤
750 mA
5 mA ≤ IO ≤ 1A, 0˚C ≤ Tj ≤
50
120
150
mV
+125˚C
IQ
Quiescent Current IO ≤ 1A
Tj = 25˚C
0˚C ≤ Tj ≤ +125˚C
Quiescent Current 5 mA ≤ IO ≤ 1A
8
8
8
mA
mA
mA
mA
V
8.5
0.5
1.0
8.5
8.5
0.5
1.0
∆IQ
0.5
1.0
Change
Tj = 25˚C, IO ≤ 1A
VMIN ≤ VIN ≤ VMAX
(7.5 ≤ VIN ≤ 20)
(14.8 ≤ VIN≤ 27)
(17.9 ≤ VIN
≤
30)
IO ≤ 500 mA, 0˚C ≤ Tj ≤ +125˚C
VMIN ≤ VIN ≤ VMAX
1.0
1.0
1.0
mA
V
(7 ≤ VIN ≤ 25)
(14.5 ≤ VIN≤ 30)
(17.5 ≤ VIN
≤
30)
VN
Output Noise
Voltage
TA =25˚C, 10 Hz ≤ f ≤ 100 kHz
40
75
90
µV
dB
dB
Ripple Rejection
IO ≤ 1A, Tj = 25˚C 62
or
80
55
55
72
54
54
70
f = 120 Hz IO ≤ 500 mA
0˚C ≤ Tj ≤ +125˚C
VMIN ≤ VIN ≤ VMAX
62
(8 ≤ VIN ≤ 18)
(15 ≤ VIN ≤ 25)
(18.5 ≤ VIN
≤
V
28.5)
RO
Dropout Voltage
Tj = 25˚C, IOUT = 1A
2.0
8
2.0
18
2.0
19
V
Output Resistance f = 1 kHz
mΩ
3
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Electrical Characteristics LM78XXC (Note 2) (Continued)
0˚C ≤ TJ ≤ 125˚C unless otherwise noted.
Output Voltage
5V
12V
19V
15V
23V
Input Voltage (unless otherwise noted)
10V
Units
Symbol
Parameter
Conditions
Min Typ Max Min Typ Max Min Typ Max
Short-Circuit
Current
Tj = 25˚C
Tj = 25˚C
2.1
2.4
0.6
1.5
2.4
1.5
1.2
2.4
1.8
A
A
Peak Output
Current
Average TC of
VOUT
0˚C ≤ Tj ≤ +125˚C, IO = 5 mA
Tj = 25˚C, IO ≤ 1A
mV/˚C
VIN
Input Voltage
Required to
Maintain
7.5
14.6
17.7
V
Line Regulation
Note 1: Thermal resistance of the TO-3 package (K, KC) is typically 4˚C/W junction to case and 35˚C/W case to ambient. Thermal resistance of the TO-220 package
(T) is typically 4˚C/W junction to case and 50˚C/W case to ambient.
Note 2: All characteristics are measured with capacitor across the input of 0.22 µF, and a capacitor across the output of 0.1µF. All characteristics except noise voltage
and ripple rejection ratio are measured using pulse techniques (t ≤ 10 ms, duty cycle ≤ 5%). Output voltage changes due to changes in internal temperature must
w
be taken into account separately.
Note 3: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. For guaranteed specifications and the test conditions, see Elec-
trical Characteristics.
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4
Typical Performance Characteristics
Maximum Average Power Dissipation
Maximum Average Power Dissipation
DS007746-5
DS007746-6
Peak Output Current
Output Voltage (Normalized to 1V at TJ = 25˚C)
DS007746-7
DS007746-8
Ripple Rejection
Ripple Rejection
DS007746-10
DS007746-9
5
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Typical Performance Characteristics (Continued)
Output Impedance
Dropout Characteristics
Quiescent Current
Dropout Voltage
DS007746-11
DS007746-13
DS007746-15
DS007746-12
Quiescent Current
DS007746-14
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6
Physical Dimensions inches (millimeters) unless otherwise noted
Aluminum Metal Can Package (KC)
Order Number LM7805CK, LM7812CK or LM7815CK
NS Package Number KC02A
7
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
TO-220 Package (T)
Order Number LM7805CT, LM7812CT or LM7815CT
NS Package Number T03B
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COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
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systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.
2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
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