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 regu-
lation.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
deliver100mA output current.Current limiting is included to
limit the peak output current to a safe value.Safe area
protection for the output transistors is provided to limit inter-
nal 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.
Features
n LM78L05in micro SMD package支撑体
10658154n Output voltage tolerances of±5%over the temperature
range
n Output current of100mA
n Internal thermal overload protection
n Output transistor safe area protection
n Internal short circuit current limit
n Available in plastic TO-92and plastic SO-8low profile
packages
n No external components
n Output voltages of5.0V,6.2V,8.2V,9.0V,12V,15V
n See AN-1112for micro SMD considerations Connection Diagrams
SO-8Plastic(M)
(Narrow Body)
DS007744-2
Top View
8-Bump micro SMD
DS007744-24
Top View
(Bump Side Down)
(TO-92)
Plastic Package(Z)
November2000LM78LXX
Series
空气加温器
3-Terminal
Positive
Regulators ©2000National Semiconductor Corporation DS007744www.national
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distributors for availability and specifications.Power Dissipation (Note 5)Internally Limited
Input Voltage
35V
Storage Temperature
−65˚C to +150˚C
Operating Junction Temperature SO-8
0˚C to 125˚C micro SMD
−40˚C to 85˚C Soldering Information
Infrared or Convection (20sec.)235˚C
Wave Soldering (10sec.)260˚C (lead time)
ESD Susceptibility (Note 2)
1kV
LM78LXX Electrical Characteristics
Limits in standard typeface are for T J =25˚C,Bold typeface ap-plies over 0˚C to 125˚C for SO-8package and −40˚C to 85˚C for micro SMD package.Limits are guaranteed by produc-tion testing or correlation techniques using standard Statistical Quality Control (SQC)methods.Unless otherwise specified:I O =40mA,C I =0.33µF,C O =0.1µF.
丝绵机LM78L05
nhdt-471Unless otherwise specified,V IN =10V Symbol Parameter
Conditions
Min Typ Max Units
Output Voltage
4.85
5.2V 7V ≤V IN ≤20V 1mA ≤I O ≤40mA (Note 3)
4.75
5.251mA ≤I O ≤70mA (Note 3)
4.75
5.25∆V O Line Regulation 7V ≤V IN ≤20V 1875mV 8V ≤V IN ≤20V 1054∆V O Load Regulation 1mA ≤I O ≤100mA 20601mA ≤I O ≤40mA
530I Q Quiescent Current 35mA ∆I Q Quiescent Current Change 8V ≤V IN ≤20V 1.01mA ≤I O ≤40mA 0.1
V n
Output Noise Voltage f =10Hz to 100kHz (Note 4)40
µV Ripple Rejection
f =120Hz
8V ≤V IN ≤16V
47
62dB I PK
Peak Output Current
140
mA
LM78L62AC
(Continued)
Unless otherwise specified,V IN =12V
Symbol Parameter
Conditions
Min
Typ Max Units
I Q Quiescent Current 2
5.5mA ∆I Q Quiescent Current Change 8V ≤V IN ≤20V 1.51mA ≤I O ≤40mA 0.1
V n
Output Noise Voltage f =10Hz to 100kHz (Note 4)50µV Ripple Rejection
f =120Hz
10V ≤V IN ≤20V
40
46dB I PK
Peak Output Current
140
mA Average Output Voltage Tempco
I O =5mA
−0.8mV/˚C V IN (Min)
Minimum Value of Input Voltage
Required to Maintain Line Regulation
9.9
V
LM78L09AC
Unless otherwise specified,V IN =15V Symbol Parameter
Conditions
Min Typ Max Units
V O
Output Voltage
8.649.0
9.36V 11.5V ≤V IN ≤24V 1mA ≤I O ≤40mA (Note 3)
8.559.451mA ≤I O ≤70mA (Note 3)
8.55
9.45
LM78LXX Series
www.national
3
LM78L09AC
(Continued)
Unless otherwise specified,V IN =15V
Symbol Parameter
Conditions Min
Typ Max Units
∆V O Line Regulation 11.5V ≤V IN ≤24V 100200mV 13V ≤V IN ≤24V 90150∆V O Load Regulation 1mA ≤I O ≤100mA 20901mA ≤I O ≤40mA
1045I Q Quiescent Current 2
5.5mA ∆I Q Quiescent Current Change 11.5V ≤V IN ≤24V 1.51mA ≤I O ≤40mA
0.1
V n
Output Noise Voltage 70µV Ripple Rejection
f =120Hz
15V ≤V IN ≤25V
38
44dB I PK
Peak Output Current
140
mA Average Output Voltage Tempco
I O =5mA
−1.0mV/˚C V IN (Min)
Minimum Value of Input Voltage
Required to Maintain Line Regulation
13.7
14.5
V
L M 78L X X S e r i e s
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LM78L15AC
Unless otherwise specified,V IN =23V Symbol Parameter
Conditions
Min Typ Max Units
V O
Output Voltage
14.415.0
15.6V 17.5V ≤V IN ≤30V 1mA ≤I O ≤40mA (Note 3)
14.2515.751mA ≤I O ≤70mA (Note 3)
14.25
15.75∆V O Line Regulation 17.5V ≤V IN ≤30V 37250mV 20V ≤V IN ≤30V 25140∆V O Load Regulation 1mA ≤I O ≤100mA 351501mA ≤I O ≤40mA
1275I Q
Quiescent Current 35mA ∆I Q
Quiescent Current Change 20V ≤V IN ≤30V 11mA ≤I O ≤40mA
0.1
V n
Output Noise Voltage 90µV Ripple Rejection
f =120Hz
18.5V ≤V IN ≤28.5V
37
51dB I PK
Peak Output Current
140
mA
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