National Semiconductor LM78LXX Technical data

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 usu­ally 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 regu­lation. 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

n LM78L05 in micro SMD package
n Output voltage tolerances of

n Output current of 100mA
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

n No external components
n Output voltages of 5.0V, 6.2V, 8.2V, 9.0V, 12V, 15V
n See AN-1112 for micro SMD considerations

range

packages

May 2003

±

5% over the temperature

LM78LXX Series 3-Terminal Positive Regulators

Connection Diagrams

SO-8 Plastic (M)

(Narrow Body)

Top View

8-Bump micro SMD

Top View

(Bump Side Down)

00774402

00774424

(TO-92)

Plastic Package (Z)

00774403

Bottom View

micro SMD Marking Orientation

00774433

Top View

© 2003 National Semiconductor Corporation DS007744 www.national.com

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

LM78LXX Series

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

= 25˚C, Bold typeface

J

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

= 40mA, CI= 0.33µF, CO= 0.1µF.

O

LM78L05

Unless otherwise specified, VIN= 10V

Symbol Parameter Conditions Min Typ Max Units

∆V

∆V

I

Q

V

V

O

O

O

Q

n

Output Voltage 4.8 5 5.2

7V ≤ V
1mA ≤ I

IN

O

≤ 20V

≤ 40mA

4.75 5.25

(Note 3)

1mA ≤ I
(Note 3)

≤ 70mA

O

4.75 5.25

Line Regulation 7V ≤ VIN≤ 20V 18 75

8V ≤ V

≤ 20V 10 54

IN

Load Regulation 1mA ≤ IO≤ 100mA 20 60

1mA ≤ I

≤ 40mA 5 30

O

Quiescent Current 3 5

Quiescent Current Change 8V ≤ VIN≤ 20V 1.0

1mA ≤ I

Output Noise Voltage f = 10 Hz to 100 kHz

(Note 4)

≤ 40mA 0.1

O

40 µV

Ripple Rejection f = 120 Hz

8V ≤ V

IN

≤ 16V

47 62 dB

V

mV

mA∆I

I

PK

Peak Output Current 140 mA

Average Output Voltage Tempco IO= 5mA

−0.65 mV/˚C

V

(Min) Minimum Value of Input Voltage

IN

Required to Maintain Line Regulation

θ

JA

Thermal Resistance
(8-Bump micro SMD)

6.7 7 V

230.9 ˚C/W

LM78L62AC

Unless otherwise specified, VIN= 12V

Symbol Parameter Conditions Min Typ Max Units

V

O

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Output Voltage 5.95 6.2 6.45

8.5V ≤ V
1mA ≤ I

≤ 20V

IN

≤ 40mA

O

5.9 6.5

(Note 3)

1mA ≤ I
(Note 3)

≤ 70mA

O

5.9 6.5

V

LM78LXX Series

LM78LXX Electrical Characteristics Limits in standard typeface are for T

= 25˚C, Bold typeface

J

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

= 40mA, CI= 0.33µF, CO= 0.1µF. (Continued)

O

LM78L62AC (Continued)

Unless otherwise specified, VIN= 12V

Symbol Parameter Conditions Min Typ Max Units

∆V

O

∆V

O

I

Q

Q

V

n

I

PK

V

(Min) Minimum Value of Input Voltage

IN

Line Regulation 8.5V ≤ VIN≤ 20V 65 175

9V ≤ V

≤ 20V 55 125

IN

Load Regulation 1mA ≤ IO≤ 100mA 13 80

1mA ≤ I

≤ 40mA 6 40

O

Quiescent Current 2 5.5

Quiescent Current Change 8V ≤ VIN≤ 20V 1.5

1mA ≤ I

Output Noise Voltage f = 10 Hz to 100 kHz

(Note 4)

≤ 40mA 0.1

O

50 µV

Ripple Rejection f = 120 Hz

10V ≤ V

IN

≤ 20V

40 46 dB

Peak Output Current 140 mA

Average Output Voltage Tempco IO= 5mA

−0.75 mV/˚C

Required to Maintain Line Regulation

7.9 V

mV

mA∆I

LM78L82AC

Unless otherwise specified, VIN= 14V

Symbol Parameter Conditions Min Typ Max Units

V

∆V

∆V

I

Q

V

I

PK

O

O

O

Q

n

Output Voltage 7.87 8.2 8.53

11V ≤ V
1mA ≤ I

≤ 23V

IN

≤ 40mA

O

7.8 8.6

(Note 3)

1mA ≤ IO≤ 70mA
(Note 3)

7.8 8.6

Line Regulation 11V ≤ VIN≤ 23V 80 175

12V ≤ V

≤ 23V 70 125

IN

Load Regulation 1mA ≤ IO≤ 100mA 15 80

1mA ≤ I

≤ 40mA 8 40

O

Quiescent Current 2 5.5

Quiescent Current Change 12V ≤ VIN≤ 23V 1.5

1mA ≤ I

Output Noise Voltage f = 10 Hz to 100 kHz

(Note 4)

≤ 40mA 0.1

O

60 µV

Ripple Rejection f = 120 Hz

12V ≤ V

IN

≤ 22V

39 45 dB

Peak Output Current 140 mA

Average Output Voltage Tempco IO= 5mA

−0.8 mV/˚C

V

mV

mA∆I

V

(Min) Minimum Value of Input Voltage

IN

Required to Maintain Line Regulation

9.9 V

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LM78LXX Electrical Characteristics Limits in standard typeface are for T

= 25˚C, Bold typeface

J

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

LM78L09AC

LM78LXX Series

Unless otherwise specified, VIN= 15V

= 40mA, CI= 0.33µF, CO= 0.1µF. (Continued)

O

Symbol Parameter Conditions Min Typ Max Units

V

O

Output Voltage 8.64 9.0 9.36

11.5V ≤ V
1mA ≤ I

IN

≤ 40mA

O

≤ 24V

8.55 9.45

(Note 3)

≤ 70mA

O

≤ 24V 90 150

IN

≤ 40mA 10 45

O

≤ 40mA 0.1

O

8.55 9.45

∆V

∆V

I

Q

V

1mA ≤ I
(Note 3)

O

Line Regulation 11.5V ≤ VIN≤ 24V 100 200

13V ≤ V

O

Load Regulation 1mA ≤ IO≤ 100mA 20 90

1mA ≤ I

Quiescent Current 2 5.5

Q

Quiescent Current Change 11.5V ≤ VIN≤ 24V 1.5

1mA ≤ I

n

Output Noise Voltage 70 µV

Ripple Rejection f = 120 Hz

15V ≤ V

IN

≤ 25V

38 44 dB

V

mV

mA∆I

I

PK

Peak Output Current 140 mA

Average Output Voltage Tempco IO= 5mA

−0.9 mV/˚C

V

(Min) Minimum Value of Input Voltage

IN

Required to Maintain Line Regulation

10.7 V

LM78L12AC

Unless otherwise specified, VIN= 19V

Symbol Parameter Conditions Min Typ Max Units

V

∆V

∆V

I

Q

V

O

O

O

Q

n

Output Voltage 11.5 12 12.5

14.5V ≤ V
1mA ≤ I

IN

≤ 40mA

O

≤ 27V

11.4 12.6

(Note 3)

1mA ≤ IO≤ 70mA
(Note 3)

11.4 12.6

Line Regulation 14.5V ≤ VIN≤ 27V 30 180

16V ≤ V

≤ 27V 20 110

IN

Load Regulation 1mA ≤ IO≤ 100mA 30 100

1mA ≤ I

≤ 40mA 10 50

O

Quiescent Current 3 5

Quiescent Current Change 16V ≤ VIN≤ 27V 1

1mA ≤ I

≤ 40mA 0.1

O

Output Noise Voltage 80 µV

Ripple Rejection f = 120 Hz

15V ≤ V

≤ 25

IN

40 54 dB

V

mV

mA∆I

I

PK

Peak Output Current 140 mA

Average Output Voltage Tempco IO= 5mA

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−1.0 mV/˚C