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PDF LM78XX Data sheet ( Hoja de datos )
| Número de pieza | LM78XX | |
| Descripción | 3-Terminal 1A Positive Voltage Regulator | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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LM78XX/LM78XXA
3-Terminal 1A Positive Voltage Regulator
May 2006
Features
■ Output Current up to 1A
■ Output Voltages of 5, 6, 8, 9, 10, 12, 15, 18, 24
■ Thermal Overload Protection
■ Short Circuit Protection
■ Output Transistor Safe Operating Area Protection
General Description
The LM78XX series of three terminal positive regulators
are available in the TO-220 package and with several
fixed output voltages, making them useful in a wide
range of applications. Each type employs internal current
limiting, thermal shut down and safe operating area pro-
tection, making it essentially indestructible. If adequate
heat sinking is provided, they can deliver over 1A output
current. Although designed primarily as fixed voltage
regulators, these devices can be used with external com-
ponents to obtain adjustable voltages and currents.
Ordering Information
Product Number
LM7805CT
LM7806CT
LM7808CT
LM7809CT
LM7810CT
LM7812CT
LM7815CT
LM7818CT
LM7824CT
LM7805ACT
LM7806ACT
LM7808ACT
LM7809ACT
LM7810ACT
LM7812ACT
LM7815ACT
LM7818ACT
LM7824ACT
Output Voltage Tolerance
±4%
±2%
Package
TO-220
Operating Temperature
-40°C to +125°C
0°C to +125°C
©2006 Fairchild Semiconductor Corporation
LM78XX/LM78XXA Rev. 1.0.1
1
www.fairchildsemi.com
1 page  
Electrical Characteristics (LM7808) (Continued)
Refer to the test circuits. -40°C < TJ < 125°C, IO = 500mA, VI = 14V, CI = 0.33µF, CO = 0.1µF, unless otherwise specified.
Symbol
Parameter
Conditions
Min. Typ. Max. Unit
VO Output Voltage
TJ = +25°C
7.7 8.0 8.3
V
Regline Line Regulation(5)
5mA ≤ IO ≤ 1A, PO ≤ 15W,
VI = 10.5V to 23V
TJ = +25°C VI = 10.5V to 25V
7.6 8.0 8.4
– 5.0 160 mV
Regload Load Regulation(5)
VI = 11.5V to 17V
TJ = +25°C IO = 5mA to 1.5A
– 2.0 80.0
–
10.0 160
mV
IO = 250mA to 750mA –
5.0 80.0
IQ Quiescent Current
TJ = +25°C
– 5.0 8.0 mA
∆IQ Quiescent Current Change IO = 5mA to 1A
– 0.05 0.5 mA
∆VO/∆T Output Voltage Drift(6)
VI = 10.5V to 25V
IO = 5mA
– 0.5 1.0
– -0.8 – mV/°C
VN Output Noise Voltage
RR Ripple Rejection(6)
f = 10Hz to 100kHz, TA = +25°C
f = 120Hz, VO = 11.5V to 21.5V
– 52.0
56.0 73.0
– µV/VO
– dB
VDROP Dropout Voltage
rO Output Resistance(6)
IO = 1A, TJ = +25°C
f = 1kHz
– 2.0 –
– 17.0 –
V
mΩ
ISC Short Circuit Current
IPK Peak Current(6)
VI = 35V, TA = +25°C
TJ = +25°C
– 230 – mA
– 2.2 –
A
Notes:
5. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
6. These parameters, although guaranteed, are not 100% tested in production.
LM78XX/LM78XXA Rev. 1.0.1
5
www.fairchildsemi.com
5 Page 
Electrical Characteristics (LM7824) (Continued)
Refer to the test circuits. -40°C < TJ < 125°C, IO = 500mA, VI = 33V, CI = 0.33µF, CO = 0.1µF, unless otherwise specified.
Symbol
Parameter
Conditions
Min. Typ. Max. Unit
VO Output Voltage
TJ = +25°C
Regline Line Regulation(17)
5mA ≤ IO ≤ 1A, PO ≤ 15W,
VI = 27V to 38V
TJ = +25°C VI = 27V to 38V
Regload Load Regulation(17)
VI = 30V to 36V
TJ = +25°C IO = 5mA to 1.5A
IO = 250mA to 750mA
IQ Quiescent Current
TJ = +25°C
∆IQ Quiescent Current Change IO = 5mA to 1A
∆VO/∆T Output Voltage Drift(18)
VI = 27V to 38V
IO = 5mA
VN Output Noise Voltage
RR Ripple Rejection(18)
f = 10Hz to 100kHz, TA = +25°C
f = 120Hz, VI = 28V to 38V
VDROP Dropout Voltage
rO Output Resistance(18)
IO = 1A, TJ = +25°C
f = 1kHz
23.0
22.8
–
–
–
–
–
–
–
–
–
50.0
–
–
24.0 25.0
24.0 25.25
V
17.0
6.0
15.0
5.0
5.2
0.1
0.5
-1.5
60.0
67.0
2.0
28.0
480 mV
240
480 mV
240
8.0 mA
0.5 mA
1.0
– mV/°C
– µV/VO
– dB
–V
– mΩ
ISC Short Circuit Current
IPK Peak Current(18)
VI = 35V, TA = +25°C
TJ = +25°C
– 230 – mA
– 2.2 –
A
Notes:
17. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
18. These parameters, although guaranteed, are not 100% tested in production.
LM78XX/LM78XXA Rev. 1.0.1
11
www.fairchildsemi.com
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet LM78XX.PDF ] | |
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