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
deliver 100mA 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
nLM78L05 in micro SMD package
nOutput voltage tolerances of ±5% over the temperature
range
nOutput current of 100mA
nInternal thermal overload protection
nOutput transistor safe area protection
nInternal short circuit current limit
nAvailable in plastic TO-92 and plastic SO-8 low profile
packages
nNo external components
nOutput voltages of 5.0V, 6.2V, 8.2V, 9.0V, 12V, 15V
nSee AN-1112 for micro SMD considerations
Connection Diagrams
SO-8 Plastic (M)
(Narrow Body)
00774402
Top View
8-Bump micro SMD
00774424
Top View
(Bump Side Down)
(TO-92)
Plastic Package (Z)
00774403
Bottom View
micro SMD Marking Orientation
00774433
Top View
April 2006
LM78LXX Series 3-Terminal Positive Regulators
© 2006 National Semiconductor Corporation DS007744 www.national.com
Ordering Information
Package NSC Drawing Output Voltage Order Number Supplied As
micro SMD BPA08AAB 5V LM78L05IBP Reel of 250
LM78L05IBPX Reel of 3000
Thin micro SMD TPA08AAA
5V LM78L05ITP Reel of 250
LM78L05ITPX Reel of 3000
9V LM78L09ITP Reel of 250
LM78L09ITPX Reel of 3000
SOIC Narrow M08A
5V LM78L05ACM Rail of 95
LM78L05ACMX Reel of 2500
12V LM78L12ACM Rail of 95
LM78L12ACMX Reel of 2500
15V LM78L15ACM Rail of 95
LM78L15ACMX Reel of 2500
TO-92 Z03A
5V LM78L05ACZ Box of 1800
6.2V LM78L62ACZ Box of 1800
8.2V LM78L82ACZ Box of 1800
9V LM78L09ACZ Box of 1800
12V LM78L12ACZ Box of 1800
15V LM78L15ACZ Box of 1800
LM78LXX Series
www.national.com 2
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
ESD Susceptibility (Note 2) 1kV
Operating Junction Temperature
SO-8, TO-92 0˚C to 125˚C
micro SMD −40˚C to 85˚C
Soldering Information
Infrared or Convection (20 sec.) 235˚C
Wave Soldering (10 sec.) 260˚C (lead time)
LM78LXX Electrical Characteristics Limits in standard typeface are for T
J
= 25˚C, Bold typeface
applies over 0˚C to 125˚C for SO-8 and TO-92 packages, and −40˚C to 85˚C for micro SMD package. Limits are guaran-
teed by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Unless other-
wise specified: I
O
= 40mA, C
I
= 0.33µF, C
O
= 0.1µF.
LM78L05
Unless otherwise specified, V
IN
= 10V
Symbol Parameter Conditions Min Typ Max Units
V
O
Output Voltage 4.8 5 5.2
V
7V ≤V
IN
≤20V
1mA ≤I
O
≤40mA
(Note 3)
4.75 5.25
1mA ≤I
O
≤70mA
(Note 3) 4.75 5.25
∆V
O
Line Regulation 7V ≤V
IN
≤20V 18 75
mV
8V ≤V
IN
≤20V 10 54
∆V
O
Load Regulation 1mA ≤I
O
≤100mA 20 60
1mA ≤I
O
≤40mA 5 30
I
Q
Quiescent Current 3 5
mA∆I
Q
Quiescent Current Change 8V ≤V
IN
≤20V 1.0
1mA ≤I
O
≤40mA 0.1
V
n
Output Noise Voltage f = 10 Hz to 100 kHz
(Note 4) 40 µV
Ripple Rejection f = 120 Hz
8V ≤V
IN
≤16V 47 62 dB
I
PK
Peak Output Current 140 mA
Average Output Voltage Tempco I
O
= 5mA −0.65 mV/˚C
V
IN
(Min) Minimum Value of Input Voltage
Required to Maintain Line Regulation 6.7 7 V
θ
JA
Thermal Resistance
(8-Bump micro SMD) 230.9 ˚C/W
LM78L62AC
Unless otherwise specified, V
IN
= 12V
Symbol Parameter Conditions Min Typ Max Units
V
O
Output Voltage 5.95 6.2 6.45
V
8.5V ≤V
IN
≤20V
1mA ≤I
O
≤40mA
(Note 3)
5.9 6.5
1mA ≤I
O
≤70mA
(Note 3) 5.9 6.5
LM78LXX Series
www.national.com3
LM78LXX Electrical Characteristics Limits in standard typeface are for T
J
= 25˚C, Bold typeface
applies over 0˚C to 125˚C for SO-8 and TO-92 packages, and −40˚C to 85˚C for micro SMD package. Limits are
guaranteed by production 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. (Continued)
LM78L62AC (Continued)
Unless otherwise specified, V
IN
= 12V
Symbol Parameter Conditions Min Typ Max Units
∆V
O
Line Regulation 8.5V ≤V
IN
≤20V 65 175
mV
9V ≤V
IN
≤20V 55 125
∆V
O
Load Regulation 1mA ≤I
O
≤100mA 13 80
1mA ≤I
O
≤40mA 6 40
I
Q
Quiescent Current 2 5.5
mA∆I
Q
Quiescent Current Change 8V ≤V
IN
≤20V 1.5
1mA ≤I
O
≤40mA 0.1
V
n
Output Noise Voltage f = 10 Hz to 100 kHz
(Note 4) 50 µV
Ripple Rejection f = 120 Hz
10V ≤V
IN
≤20V 40 46 dB
I
PK
Peak Output Current 140 mA
Average Output Voltage Tempco I
O
= 5mA −0.75 mV/˚C
V
IN
(Min) Minimum Value of Input Voltage
Required to Maintain Line Regulation 7.9 V
LM78L82AC
Unless otherwise specified, V
IN
= 14V
Symbol Parameter Conditions Min Typ Max Units
V
O
Output Voltage 7.87 8.2 8.53
V
11V ≤V
IN
≤23V
1mA ≤I
O
≤40mA
(Note 3)
7.8 8.6
1mA ≤I
O
≤70mA
(Note 3) 7.8 8.6
∆V
O
Line Regulation 11V ≤V
IN
≤23V 80 175
mV
12V ≤V
IN
≤23V 70 125
∆V
O
Load Regulation 1mA ≤I
O
≤100mA 15 80
1mA ≤I
O
≤40mA 8 40
I
Q
Quiescent Current 2 5.5
mA∆I
Q
Quiescent Current Change 12V ≤V
IN
≤23V 1.5
1mA ≤I
O
≤40mA 0.1
V
n
Output Noise Voltage f = 10 Hz to 100 kHz
(Note 4) 60 µV
Ripple Rejection f = 120 Hz
12V ≤V
IN
≤22V 39 45 dB
I
PK
Peak Output Current 140 mA
Average Output Voltage Tempco I
O
= 5mA −0.8 mV/˚C
V
IN
(Min) Minimum Value of Input Voltage
Required to Maintain Line Regulation 9.9 V
LM78LXX Series
www.national.com 4
LM78LXX Electrical Characteristics Limits in standard typeface are for T
J
= 25˚C, Bold typeface
applies over 0˚C to 125˚C for SO-8 and TO-92 packages, and −40˚C to 85˚C for micro SMD package. Limits are
guaranteed by production 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. (Continued)
LM78L09AC
Unless otherwise specified, V
IN
= 15V
Symbol Parameter Conditions Min Typ Max Units
V
O
Output Voltage 8.64 9.0 9.36
V
11.5V ≤V
IN
≤24V
1mA ≤I
O
≤40mA
(Note 3)
8.55 9.45
1mA ≤I
O
≤70mA
(Note 3) 8.55 9.45
∆V
O
Line Regulation 11.5V ≤V
IN
≤24V 100 200
mV
13V ≤V
IN
≤24V 90 150
∆V
O
Load Regulation 1mA ≤I
O
≤100mA 20 90
1mA ≤I
O
≤40mA 10 45
I
Q
Quiescent Current 2 5.5
mA∆I
Q
Quiescent Current Change 11.5V ≤V
IN
≤24V 1.5
1mA ≤I
O
≤40mA 0.1
V
n
Output Noise Voltage 70 µV
Ripple Rejection f = 120 Hz
15V ≤V
IN
≤25V 38 44 dB
I
PK
Peak Output Current 140 mA
Average Output Voltage Tempco I
O
= 5mA −0.9 mV/˚C
V
IN
(Min) Minimum Value of Input Voltage
Required to Maintain Line Regulation 10.7 V
LM78L12AC
Unless otherwise specified, V
IN
= 19V
Symbol Parameter Conditions Min Typ Max Units
V
O
Output Voltage 11.5 12 12.5
V
14.5V ≤V
IN
≤27V
1mA ≤I
O
≤40mA
(Note 3)
11.4 12.6
1mA ≤I
O
≤70mA
(Note 3) 11.4 12.6
∆V
O
Line Regulation 14.5V ≤V
IN
≤27V 30 180
mV
16V ≤V
IN
≤27V 20 110
∆V
O
Load Regulation 1mA ≤I
O
≤100mA 30 100
1mA ≤I
O
≤40mA 10 50
I
Q
Quiescent Current 3 5
mA∆I
Q
Quiescent Current Change 16V ≤V
IN
≤27V 1
1mA ≤I
O
≤40mA 0.1
V
n
Output Noise Voltage 80 µV
Ripple Rejection f = 120 Hz
15V ≤V
IN
≤25 40 54 dB
I
PK
Peak Output Current 140 mA
Average Output Voltage Tempco I
O
= 5mA −1.0 mV/˚C
LM78LXX Series
www.national.com5
LM78LXX Electrical Characteristics Limits in standard typeface are for T
J
= 25˚C, Bold typeface
applies over 0˚C to 125˚C for SO-8 and TO-92 packages, and −40˚C to 85˚C for micro SMD package. Limits are
guaranteed by production 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. (Continued)
LM78L12AC (Continued)
Unless otherwise specified, V
IN
= 19V
Symbol Parameter Conditions Min Typ Max Units
V
IN
(Min) Minimum Value of Input Voltage
Required to Maintain Line Regulation 13.7 14.5 V
LM78L15AC
Unless otherwise specified, V
IN
= 23V
Symbol Parameter Conditions Min Typ Max Units
V
O
Output Voltage 14.4 15.0 15.6
V
17.5V ≤V
IN
≤30V
1mA ≤I
O
≤40mA
(Note 3)
14.25 15.75
1mA ≤I
O
≤70mA
(Note 3) 14.25 15.75
∆V
O
Line Regulation 17.5V ≤V
IN
≤30V 37 250
mV
20V ≤V
IN
≤30V 25 140
∆V
O
Load Regulation 1mA ≤I
O
≤100mA 35 150
1mA ≤I
O
≤40mA 12 75
I
Q
Quiescent Current 3 5
mA∆I
Q
Quiescent Current Change 20V ≤V
IN
≤30V 1
1mA ≤I
O
≤40mA 0.1
V
n
Output Noise Voltage 90 µV
Ripple Rejection f = 120 Hz
18.5V ≤V
IN
≤28.5V 37 51 dB
I
PK
Peak Output Current 140 mA
Average Output Voltage Tempco I
O
= 5mA −1.3 mV/˚C
V
IN
(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 kΩin series with 100pF.
Note 3: Power dissipation ≤0.75W.
Note 4: Recommended minimum load capacitance of 0.01µF to limit high frequency noise.
Note 5: Typical thermal resistance values for the packages are:
ZPackage: θJC = 60 ˚C/W, = θJA = 230 ˚C/W
MPackage: θJA = 180 ˚C/W
micro SMD Package: θJA = 230.9˚C/W
LM78LXX Series
www.national.com 6
Typical Performance Characteristics
Maximum Average Power Dissipation (Z Package) Peak Output Current
00774414 00774416
Dropout Voltage Ripple Rejection
00774417 00774418
Output Impedance Quiescent Current
00774419 00774420
LM78LXX Series
www.national.com7
Typical Performance Characteristics (Continued)
Quiescent Current
00774421
Equivalent Circuit
LM78LXX
00774407
LM78LXX Series
www.national.com 8
Typical Applications
Fixed Output Regulator
00774408
*Required if the regulator is located more than 3" from the power supply filter.
**See (Note 4) in the electrical characteristics table.
Adjustable Output Regulator
00774409
VOUT = 5V + (5V/R1 + IQ)R2
5V/R1 >3I
Q, load regulation (Lr)≈[(R1 + R2)/R1] (Lrof LM78L05)
Current Regulator
00774410
IOUT =(V
OUT/R1) + IQ
>IQ= 1.5mA over line and load changes
5V, 500mA Regulator with Short Circuit Protection
00774411
*Solid tantalum.
**Heat sink Q1.
***Optional: Improves ripple rejection and transient response.
Load Regulation: 0.6% 0 ≤IL≤250mA pulsed with tON = 50ms.
LM78LXX Series
www.national.com9
Typical Applications (Continued)
±15V, 100mA Dual Power Supply
00774412
*Solid tantalum.
Variable Output Regulator 0.5V-18V
00774413
*Solid tantalum.
VOUT =V
G+ 5V, R1 = (−VIN/IQ LM78L05)
VOUT = 5V (R2/R4) for (R2 + R3) = (R4 + R5)
A 0.5V output will correspond to (R2/R4) = 0.1 (R3/R4) = 0.9
LM78LXX Series
www.national.com 10
Physical Dimensions inches (millimeters) unless otherwise noted
NOTES: UNLESS OTHERWISE SPECIFIED
1. EPOXY COATING
2. 63Sn/37Pb EUTECTIC BUMP
3. RECOMMEND NON-SOLDER MASK DEFINED LANDING PAD.
4. PIN A1 IS ESTABLISHED BY LOWER LEFT CORNER WITH RESPECT TO TEXT ORIENTATION. REMAINING PINS ARE NUMBERED
COUNTERCLOCKWISE.
5. XXX IN DRAWING NUMBER REPRESENTS PACKAGE SIZE VARIATION WHERE X1IS PACKAGE WIDTH, X2IS PACKAGE LENGTH AND X3IS
PACKAGE HEIGHT.
6. REFERENCE JEDEC REGISTRATION MO-211, VARIATION BC.
8-Bump micro SMD
NS Package Number BPA08AAB
X1 = 1.285mm X2 = 1.285mm X3 = 0.850mm
LM78LXX Series
www.national.com11
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
8-Bump Thin micro SMD
NS Package Number TPA08AAA
X1 = 1.285mm X2 = 1.285mm X3 = 0.500mm
LM78LXX Series
www.national.com 12
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
S.O. Package (M)
NS Package Number M08A
LM78LXX Series
www.national.com13
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Molded Offset TO-92 (Z)
NS Package Number Z03A
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves
the right at any time without notice to change said circuitry and specifications.
For the most current product information visit us at www.national.com.
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS
WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body, or
(b) support or sustain life, and whose failure to perform when
properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to result
in a significant injury to the user.
2. A critical component is any component of a life support
device or system whose failure to perform can be reasonably
expected to cause the failure of the life support device or
system, or to affect its safety or effectiveness.
BANNED SUBSTANCE COMPLIANCE
National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products
Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain
no ‘‘Banned Substances’’ as defined in CSP-9-111S2.
Leadfree products are RoHS compliant.
National Semiconductor
Americas Customer
Support Center
Email: new.feedback@nsc.com
Tel: 1-800-272-9959
National Semiconductor
Europe Customer Support Center
Fax: +49 (0) 180-530 85 86
Email: europe.support@nsc.com
Deutsch Tel: +49 (0) 69 9508 6208
English Tel: +44 (0) 870 24 0 2171
Français Tel: +33 (0) 1 41 91 8790
National Semiconductor
Asia Pacific Customer
Support Center
Email: ap.support@nsc.com
National Semiconductor
Japan Customer Support Center
Fax: 81-3-5639-7507
Email: jpn.feedback@nsc.com
Tel: 81-3-5639-7560
www.national.com
LM78LXX Series 3-Terminal Positive Regulators
