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PDF LM78L12AC Data sheet ( Hoja de datos )
| Número de pieza | LM78L12AC | |
| Descripción | 3-Terminal Positive Regulators | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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January 2000
LM78LXX Series
3-Terminal Positive Regulators
General Description
The LM78LXX series of three terminal positive regulators is
available with several fixed output voltages making them
useful in a wide range of applications. When used as a zener
diode/resistor combination replacement, the LM78LXX usu-
ally results in an effective output impedance improvement of
two orders of magnitude, and lower quiescent current. These
regulators can provide local on card regulation, eliminating
the distribution problems associated with single point regula-
tion. The voltages available allow the LM78LXX to be used in
logic systems, instrumentation, HiFi, and other solid state
electronic equipment.
The LM78LXX is available in the plastic TO-92 (Z) package,
the plastic SO-8 (M) package and a chip sized package
(8-Bump micro SMD) using National’s micro SMD package
technology. With adequate heat sinking the regulator can de-
liver 100 mA output current. Current limiting is included to
limit the peak output current to a safe value. Safe area pro-
tection for the output transistors is provided to limit internal
power dissipation. If internal power dissipation becomes too
high for the heat sinking provided, the thermal shutdown cir-
cuit takes over preventing the IC from overheating.
Features
n LM78L05 in micro SMD package
n Output voltage tolerances of ±5% over the temperature
range
n Output current of 100 mA
n Internal thermal overload protection
n Output transistor safe area protection
n Internal short circuit current limit
n Available in plastic TO-92 and plastic SO-8 low profile
packages
n No external components
n Output voltages of 5.0V, 6.2V, 8.2V, 9.0V, 12V, 15V
Connection Diagrams
SO-8 Plastic (M)
(Narrow Body)
(TO-92)
Plastic Package (Z)
DS007744-2
Top View
8-Bump micro SMD
DS007744-3
Bottom View
micro SMD Marking Orientation
DS007744-24
Top View
(Bump Side Down)
© 2000 National Semiconductor Corporation DS007744
DS007744-33
Top View
www.national.com
1 page  
LM78L15AC
Unless otherwise specified, VIN = 23V
Symbol
Parameter
VO Output Voltage
∆VO
∆VO
IQ
∆IQ
Vn
IPK
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current Change
Output Noise Voltage
Ripple Rejection
Peak Output Current
Average Output Voltage Tempco
Conditions
17.5V ≤ VIN ≤ 30V
1 mA ≤ IO ≤ 40 mA
(Note 3)
1 mA ≤ IO ≤ 70 mA
(Note 3)
17.5V ≤ VIN ≤ 30V
20V ≤ VIN ≤ 30V
1 mA ≤ IO ≤ 100 mA
1 mA ≤ IO ≤ 40 mA
20V ≤ VIN ≤ 30V
1 mA ≤ IO ≤ 40 mA
f = 120 Hz
18.5V ≤ VIN ≤ 28.5V
IO = 5 mA
Min
14.4
14.25
14.25
37
Typ
15.0
37
25
35
12
3
90
51
140
−1.3
Max Units
15.6
15.75
V
15.75
250
140
150
75
5
1
0.1
mV
mA
µV
dB
mA
mV/˚C
VIN (Min)
Minimum Value of Input Voltage
Required to Maintain Line Regulation
16.7 17.5
V
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device
outside of its stated operating conditions.
Note 2: Human body model, 1.5 kΩ in series with 100 pF.
Note 3: Power dissipation ≤ 0.75W.
Note 4: Recommended minimum load capacitance of 0.01 µF to limit high frequency noise.
Note 5: Typical thermal resistance values for the packages are:
Z Package: θJC = 60 ˚C/W, = θJA = 230 ˚C/W
M Package: θJA = 180 ˚C/W
micro SMD Package: θJA = 230.9˚C/W
5 www.national.com
5 Page 
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
S.O. Package (M)
Order Number LM78L05ACM, LM78L12ACM or LM78L15ACM
NS Package Number M08A
Molded Offset TO-92 (Z)
Order Number LM78L05ACZ, LM78L09ACZ, LM78L12ACZ,
LM78L15ACZ, LM78L62ACZ or LM78L82ACZ
NS Package Number Z03A
11 www.national.com
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LM78L12AC.PDF ] | |
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