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Спецификация 7805 изготовлена «National Semiconductor» и имеет функцию, называемую «Series Voltage Regulators». |
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Детали детали
Номер произв | 7805 |
Описание | Series Voltage Regulators |
Производители | National Semiconductor |
логотип |
8 Pages
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May 2000
LM78XX
Series Voltage Regulators
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.
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.
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-
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.
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
Voltage Range
LM7805C
LM7812C
LM7815C
5V
12V
15V
Connection Diagrams
Metal Can Package
TO-3 (K)
Aluminum
Plastic Package
TO-220 (T)
DS007746-2
Bottom View
Order Number LM7805CK,
LM7812CK or LM7815CK
See NS Package Number KC02A
DS007746-3
Top View
Order Number LM7805CT,
LM7812CT or LM7815CT
See NS Package Number T03B
© 2000 National Semiconductor Corporation DS007746
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Schematic
DS007746-1
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Absolute Maximum Ratings (Note 3)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Input Voltage
(VO = 5V, 12V and 15V)
Internal Power Dissipation (Note 1)
Operating Temperature Range (TA)
35V
Internally Limited
0˚C to +70˚C
Maximum Junction Temperature
(K Package)
(T Package)
Storage Temperature Range
Lead Temperature (Soldering, 10 sec.)
TO-3 Package K
TO-220 Package T
150˚C
150˚C
−65˚C to +150˚C
300˚C
230˚C
Electrical Characteristics LM78XXC (Note 2)
0˚C ≤ TJ ≤ 125˚C unless otherwise noted.
Output Voltage
5V 12V 15V
Input Voltage (unless otherwise noted)
10V 19V 23V
Symbol
Parameter
Conditions
Min Typ Max Min Typ Max Min Typ Max
VO
Output Voltage
Tj = 25˚C, 5 mA ≤ IO ≤ 1A
4.8 5 5.2 11.5 12 12.5 14.4 15 15.6
PD ≤ 15W, 5 mA ≤ IO ≤ 1A
4.75
5.25 11.4
12.6 14.25
15.75
VMIN ≤ VIN ≤ VMAX
(7.5 ≤ VIN ≤ 20)
(14.5 ≤ VIN ≤
27)
(17.5 ≤ VIN ≤
30)
∆VO Line Regulation IO = 500 Tj = 25˚C
mA
3 50
4 120
4 150
∆VIN
(7 ≤ VIN ≤ 25) 14.5 ≤ VIN ≤ 30)
(17.5 ≤ VIN ≤
30)
0˚C ≤ Tj ≤ +125˚C 50 120 150
∆VIN
(8 ≤ VIN ≤ 20)
(15 ≤ VIN ≤ 27)
(18.5 ≤ VIN ≤
30)
IO ≤ 1A
Tj = 25˚C
∆VIN
50
(7.5 ≤ VIN ≤ 20)
120
(14.6 ≤ VIN ≤
27)
150
(17.7 ≤ VIN ≤
30)
0˚C ≤ Tj ≤ +125˚C
25
60
75
∆VO
Load Regulation
Tj = 25˚C
∆VIN
5 mA ≤ IO ≤ 1.5A
250 mA ≤ IO ≤
750 mA
(8 ≤ VIN ≤ 12)
10 50
25
(16 ≤ VIN ≤ 22)
12 120
60
(20 ≤ VIN ≤ 26)
12 150
75
5 mA ≤ IO ≤ 1A, 0˚C ≤ Tj ≤
+125˚C
50 120 150
IQ
Quiescent Current IO ≤ 1A
Tj = 25˚C
888
0˚C ≤ Tj ≤ +125˚C 8.5 8.5 8.5
∆IQ Quiescent Current 5 mA ≤ IO ≤ 1A
Change
Tj = 25˚C, IO ≤ 1A
VMIN ≤ VIN ≤ VMAX
0.5
1.0
(7.5 ≤ VIN ≤ 20)
0.5
1.0
(14.8 ≤ VIN≤ 27)
0.5
1.0
(17.9 ≤ VIN ≤
30)
IO ≤ 500 mA, 0˚C ≤ Tj ≤ +125˚C
VMIN ≤ VIN ≤ VMAX
1.0 1.0
(7 ≤ VIN ≤ 25) (14.5 ≤ VIN≤ 30)
1.0
(17.5 ≤ VIN ≤
30)
VN Output Noise
TA =25˚C, 10 Hz ≤ f ≤ 100 kHz
40
75
90
Voltage
Ripple Rejection
IO ≤ 1A, Tj = 25˚C 62 80
or
55 72
54 70
f = 120 Hz IO ≤ 500 mA
62
55
54
0˚C ≤ Tj ≤ +125˚C
VMIN ≤ VIN ≤ VMAX
(8 ≤ VIN ≤ 18)
(15 ≤ VIN ≤ 25)
(18.5 ≤ VIN ≤
28.5)
RO Dropout Voltage Tj = 25˚C, IOUT = 1A
Output Resistance f = 1 kHz
2.0 2.0 2.0
8 18 19
Units
V
V
V
mV
V
mV
V
mV
V
mV
V
mV
mV
mV
mA
mA
mA
mA
V
mA
V
µV
dB
dB
V
V
mΩ
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