LM7812CK [TI]
12V FIXED POSITIVE REGULATOR, MBFM2, METAL CAN-2;
| 型号： | LM7812CK |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 12V FIXED POSITIVE REGULATOR, MBFM2, METAL CAN-2 输出元件 调节器 |
| 文件： | 总7页 (文件大小：168K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LM7805C, LM7812C, LM7815C
www.ti.com
SNOSBR7C –MAY 2004–REVISED OCTOBER 2011
LM78XX Series Voltage Regulators
Check for Samples: LM7805C, LM7812C, LM7815C
1
FEATURES
•
•
•
Output transistor safe area protection
Internal short circuit current limit
2
•
•
•
Output current in excess of 1A
Internal thermal overload protection
No external components required
Available in the aluminum TO-3 package
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, instrumentation, HiFi, and other solid state electronic equipment. Although designed primarily as
fixed voltage regulators these devices can be used with external components to obtain adjustable voltages and
currents.
The LM78XX series is available in an aluminum TO-3 package 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 dissipation. 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 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.
For output voltage other than 5V, 12V and 15V the LM117 series provides an output voltage range from 1.2V to
57V.
Voltage Range
LM7805C
LM7812C
LM7815C
5V
12V
15V
Connection Diagrams
Metal Can Package
TO-3 (K)
Aluminum
Figure 1. Bottom View
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data and
other specifications are design goals. Texas Instruments reserves
the right to change or discontinue these products without notice.
Copyright © 2004–2011, Texas Instruments Incorporated
LM7805C, LM7812C, LM7815C
SNOSBR7C –MAY 2004–REVISED OCTOBER 2011
www.ti.com
Plastic Package
TO-220 (T)
Figure 2. Top View
Schematic Diagram
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
2
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Product Folder Links: LM7805C LM7812C LM7815C
LM7805C, LM7812C, LM7815C
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SNOSBR7C –MAY 2004–REVISED OCTOBER 2011
(1)
Absolute Maximum Ratings
Input Voltage
(VO = 5V, 12V and 15V)
35V
Internally Limited
0°C to +70°C
(2)
Internal Power Dissipation
Operating Temperature Range (TA)
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
300°C
230°C
TO-220 Package T
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. For guaranteed specifications and the test
conditions, see Electrical Characteristics.
(2) 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.
Copyright © 2004–2011, Texas Instruments Incorporated
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Product Folder Links: LM7805C LM7812C LM7815C
LM7805C, LM7812C, LM7815C
SNOSBR7C –MAY 2004–REVISED OCTOBER 2011
www.ti.com
(1)
Electrical Characteristics LM78XXC
0°C ≤ TJ ≤ 125°C unless otherwise noted.
Output Voltage
5V
12V
19V
15V
23V
Units
Input Voltage (unless otherwise noted)
10V
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
5.25 11.4
12
12.5 14.4
15
15.6
V
V
PD ≤ 15W, 5 mA ≤ IO ≤ 1A
4.75
12.6 14.2
5
15.7
5
V
MIN ≤ VIN ≤ VMAX
(7.5 ≤ VIN ≤ 20)
50
(14.5 ≤ VIN ≤ 27)
120
(17.5 ≤ VIN ≤ 30)
150
V
ΔVO
Line Regulation
IO = 500
mA
Tj = 25°C
3
4
4
mV
ΔVIN
(7 ≤ VIN ≤ 25)
50
(8 ≤ VIN ≤ 20)
50
14.5 ≤ VIN ≤ 30)
120
(17.5 ≤ VIN ≤ 30)
150
V
mV
V
0°C ≤ Tj ≤ +125°C
ΔVIN
(15 ≤ VIN ≤ 27)
120
(18.5 ≤ VIN ≤ 30)
150
IO ≤ 1A
Tj = 25°C
ΔVIN
mV
V
(7.5 ≤ VIN ≤ 20)
25
(14.6 ≤ VIN ≤ 27)
60
(17.7 ≤ VIN ≤ 30)
75
0°C ≤ Tj ≤ +125°C
ΔVIN
mV
V
(8 ≤ VIN ≤ 12)
(16 ≤ VIN ≤ 22)
(20 ≤ VIN ≤ 26)
ΔVO
Load Regulation
Tj = 25°C
5 mA ≤ IO ≤ 1.5A
10
50
25
12
120
60
12
150
75
mV
mV
250 mA ≤ IO ≤ 750
mA
5 mA ≤ IO ≤ 1A, 0°C ≤ Tj ≤
50
120
150
mV
+125°C
IQ
Quiescent Current
I
O ≤ 1A
Tj = 25°C
8
8
8
mA
mA
mA
mA
V
0°C ≤ Tj ≤ +125°C
8.5
0.5
1.0
8.5
0.5
1.0
8.5
0.5
1.0
ΔIQ
Quiescent Current
Change
5 mA ≤ IO ≤ 1A
Tj = 25°C, IO ≤ 1A
V
MIN ≤ VIN ≤ VMAX
O ≤ 500 mA, 0°C ≤ Tj ≤ +125°C
MIN ≤ VIN ≤ VMAX
TA =25°C, 10 Hz ≤ f ≤ 100 kHz
(7.5 ≤ VIN ≤ 20)
1.0
(14.8 ≤ VIN≤ 27)
(17.9 ≤ VIN ≤ 30)
I
1.0
(14.5 ≤ VIN≤ 30)
75
1.0
(17.5 ≤ VIN ≤ 30)
90
mA
V
V
(7 ≤ VIN ≤ 25)
VN
Output Noise
Voltage
40
μV
Ripple Rejection
I
or
O ≤ 1A, Tj = 25°C
62
62
80
55
55
72
54
54
70
dB
dB
f = 120 Hz
IO ≤ 500 mA
0°C ≤ Tj ≤ +125°C
V
MIN ≤ VIN ≤ VMAX
(8 ≤ VIN ≤ 18)
(15 ≤ VIN ≤ 25)
(18.5 ≤ VIN ≤ 28.5)
V
V
RO
Dropout Voltage
Tj = 25°C, IOUT = 1A
f = 1 kHz
2.0
8
2.0
18
2.0
19
Output Resistance
mΩ
A
Short-Circuit Current Tj = 25°C
Peak Output Current Tj = 25°C
Average TC of VOUT 0°C ≤ Tj ≤ +125°C, IO = 5 mA
Input Voltage
2.1
2.4
0.6
1.5
2.4
1.5
1.2
2.4
1.8
A
mV/°C
VIN
Required to
Maintain
Tj = 25°C, IO ≤ 1A
7.5
14.6
17.7
V
Line Regulation
(1) 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 (tw ≤ 10 ms, duty cycle ≤ 5%).
Output voltage changes due to changes in internal temperature must be taken into account separately.
4
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Copyright © 2004–2011, Texas Instruments Incorporated
Product Folder Links: LM7805C LM7812C LM7815C
LM7805C, LM7812C, LM7815C
www.ti.com
SNOSBR7C –MAY 2004–REVISED OCTOBER 2011
Typical Performance Characteristics
Maximum Average Power Dissipation
Maximum Average Power Dissipation
Peak Output Current
Output Voltage (Normalized to 1V at TJ = 25°C)
Ripple Rejection
Ripple Rejection
Output Impedance
Dropout Voltage
Dropout Characteristics
Quiescent Current
Copyright © 2004–2011, Texas Instruments Incorporated
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Product Folder Links: LM7805C LM7812C LM7815C
LM7805C, LM7812C, LM7815C
SNOSBR7C –MAY 2004–REVISED OCTOBER 2011
www.ti.com
Typical Performance Characteristics (continued)
Quiescent Current
6
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Copyright © 2004–2011, Texas Instruments Incorporated
Product Folder Links: LM7805C LM7812C LM7815C
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