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LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1

September 2014

LM78XX / LM78XXA

3-Terminal 1 A Positive Voltage Regulator

Features

• Output Current up to 1 A

• Output Voltages: 5, 6, 8, 9, 10, 12, 15, 18, 24 V

• Thermal Overload Protection

• Short-Circuit Protection

• Output Transistor Safe Operating Area Protection

Ordering Information(1)

Note:

1. Above output voltage tolerance is available at 25°C.

Product Number Output Voltage

Tolerance Package Operating

Temperature Packing Method

LM7805CT

±4%

TO-220

(Single G auge)

-40°C to +125°C

Rail

LM7806CT

LM7808CT

LM7809CT

LM7810CT

LM7812CT

LM7815CT

LM7818CT

LM7824CT

LM7805ACT

±2% 0°C to +125°C

LM7809ACT

LM7810ACT

LM7812ACT

LM7815ACT

Description

The LM78XX series of three-terminal positive regulators

is 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 protection. If

adequate heat sinking is provided, they can deliver over

1 A output current. Although designed primarily as fixed-

voltage regulators, these devices can be used with exter-

nal components for adjustable voltages and currents.

1. Input

2. GND

3. Output

GND

TO-220 (Single Gauge)

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 2

Block Diagram

Figure 1. Block Diagram

Absolute Maximum Ratings

Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera-

ble above the re co mmen ded operating conditions and s tres si ng the parts to these level s i s not recommended. In addi-

tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. The

absolute maximum ratings are stress ratings only. Values are at TA = 25°C unless ot herwise noted.

Symbol Parameter Value Unit

VIInput Voltage VO = 5 V to 18 V 35 V

VO = 24 V 40

RθJC Thermal Resistance, Junction-Case (TO-220) 5 °C/W

RθJA Thermal Resistance, Junction-Air (TO-220) 65 °C/W

TOPR Operati ng Tempe ratu re Rang e LM78xx -40 to +125 °C

LM78xxA 0 to +125

TSTG Storage Temperature Range - 65 to +150 °C

Starting

Circuit

Input

Reference

Voltage

Current

Generator

SOA

Protection

Thermal

Protection

Series Pass

Element

Error

Amplifier

Output

GND

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 3

Electrical Characteristics (LM7805)

Refer to the test circuit, -40°C < TJ < 125°C, IO = 500 mA, VI = 10 V, CI = 0.1 μF, unless otherwise specifi ed.

Notes:

2. 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.

3. These parameters, although guaranteed, are not 100% tested in production.

Symbol Parameter Conditions Min. Typ. Max. Unit

VOOutput Voltage TJ = +25°C 4.805.005.20 V

IO = 5 mA to 1 A, PO ≤ 15 W,

VI = 7 V to 20 V 4.75 5.00 5.25

Regline Line Regulation(2) TJ = +25°CVI = 7 V to 25 V 4.0 100.0 mV

VI = 8 V to 12 V 1.6 50.0

Regload Load Regulation(2) TJ = +25°CIO = 5 mA to 1.5 A 9.0 100.0 mV

IO = 250 mA to 750 mA 4.0 50.0

IQQuiescent Current TJ = +25°C58mA

ΔIQQuiescent Current

Change IO = 5 mA to 1 A 0.03 0.50 mA

VI = 7 V to 25 V 0.30 1.30

ΔVO/ΔT Output Voltage Drift(3) IO = 5 mA -0.8 mV/°C

VNOutput Noise Voltage f = 10 Hz to 100 kHz, TA = +25°C42μV

RR Ripple Rejection(3) f = 120 Hz, VI = 8 V to 18 V 62 73 dB

VDROP Dropout Voltage TJ = +25°C, IO = 1 A 2 V

ROOutput Resistance(3) f = 1 kHz 15 mΩ

ISC Short-Circ uit Current TJ = +25°C, VI = 35 V 230 mA

IPK Peak Current(3) TJ = +25°C2.2A

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 4

Electrical Characteristics (LM7806)

Refer to the test circuit, -40°C < T J < 125°C, IO = 500 mA, V I = 11 V, CI = 0.3 3 μF, CO = 0.1 μF, unless otherwise spec-

ified.

Notes:

4. 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.

5. These parameters, although guaranteed, are not 100% tested in production.

Symbol Parameter Conditions Min. Typ. Max. Unit

VOOutput Voltage TJ = +25°C 5.756.006.25 V

IO = 5 mA to 1 A, PO ≤ 15 W,

VI = 8.0 V to 21 V 5.70 6.00 6.30

Regline Line Regulation(4) TJ = +25°CVI = 8 V to 25 V 5.0 120.0 mV

VI = 9 V to 13 V 1.5 60.0

Regload Load Regulation(4) TJ = +25°C IO = 5 mA to 1.5 A 9.0 120.0 mV

IO = 250 mA to 750 mA 3.0 60.0

IQQuiescent Current TJ = +25°C58mA

ΔIQQuiescent Current

Change IO = 5 mA to 1 A 0.5 mA

VI = 8 V to 25 V 1.3

ΔVO/ΔT Output Voltage Drift(5) IO = 5 mA -0.8 mV/°C

VNOutput Noise Voltage f = 10 Hz to 100 kHz, TA = +25°C45μV

RR Ripple Rejection(5) f = 120 Hz, VI = 8 V to 18 V 62 73 dB

VDROP Dropout Voltage TJ = +25°C, IO = 1 A 2 V

ROOutput Resistance(5) f = 1 kHz 19 mΩ

ISC Short-Circ uit Current TJ = +25°C, VI = 35 V 250 mA

IPK Peak Current(5) TJ = +25°C2.2A

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 5

Electrical Characteristics (LM7808)

Refer to the test circuit, -40°C < T J < 125°C, IO = 500 mA, V I = 14 V, CI = 0.3 3 μF, CO = 0.1 μF, unless otherwise spec-

ified.

Notes:

6. 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.

7. These parameters, although guaranteed, are not 100% tested in production.

Symbol Parameter Conditions Min. Typ. Max. Unit

VOOutput Voltage TJ = +25°C 7.7 8.0 8.3 V

IO = 5 mA to 1 A, PO ≤ 15 W,

VI = 10.5 V to 23 V 7.6 8.0 8.4

Regline Line Regulation(6) TJ = +25°CVI = 10.5 V to 25 V 5 160 mV

VI = 11.5 V to 17 V 2 80

Regload Load Regulation(6) TJ = +25°C IO = 5 mA to 1.5 A 10 160 mV

IO = 250 mA to 750 mA 5 80

IQQuiescent Current TJ = +25°C58mA

ΔIQQuiescent Current

Change IO = 5 mA to 1 A 0.05 0.50 mA

VI = 10.5 V to 25 V 0.5 1 .0

ΔVO/ΔT Output Voltage Drift(7) IO = 5 mA -0.8 mV/°C

VNOutput Noise Voltage f = 10 Hz to 100 kHz, TA = +25°C52μV

RR Ripple Rejection(7) f = 120 Hz, VI = 11.5 V to 21.5 V 56 73 dB

VDROP Dropout Voltage IO = 1 A, TJ = +25°C2V

ROOutput Resistance(7) f = 1 kHz 17 mΩ

ISC Short-Circ uit Current VI = 35 V, TJ = +25°C230mA

IPK Peak Current(7) TJ = +25°C2.2A

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 6

Electrical Characteristics (LM7809)

Refer to the test circuit, -40°C < T J < 125°C, IO = 500 mA, V I = 15 V, CI = 0.3 3 μF, CO = 0.1 μF, unless otherwise spec-

ified.

Notes:

8. 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.

9. These parameters, although guaranteed, are not 100% tested in production.

Symbol Parameter Conditions Min. Typ. Max. Unit

VOOutput Voltage TJ = +25°C 8.659.009.35 V

IO = 5 mA to 1 A, PO ≤ 15 W,

VI = 11.5 V to 24 V 8.60 9.00 9.40

Regline Line Regulation(8) TJ = +25°CVI = 11.5 V to 25 V 6 180 mV

VI = 12 V to 17 V 2 90

Regload Load Regulation(8) TJ = +25°C IO = 5 mA to 1.5 A 12 180 mV

IO = 250 mA to 750 mA 4 90

IQQuiescent Current TJ = +25°C58mA

ΔIQQuiescent Current

Change IO = 5 mA to 1 A 0.5 mA

VI = 11.5 V to 26 V 1.3

ΔVO/ΔT Output Voltage Drift(9) IO = 5 mA -1 mV/°C

VNOutput Noise Voltage f = 10 Hz to 100 kHz, TA = +25°C58μV

RR Ripple Rejection(9) f = 120 Hz, VI = 13 V to 23 V 56 71 dB

VDROP Dropout Voltage IO = 1 A, TJ = +25°C2V

ROOutput Resistance(9) f = 1 kHz 17 mΩ

ISC Short-Circ uit Current VI = 35 V, TJ = +25°C250mA

IPK Peak Current(9) TJ = +25°C2.2A

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 7

Electrical Characteristics (LM7810)

Refer to the test circuit, -40°C < T J < 125°C, IO = 500 mA, V I = 16 V, CI = 0.3 3 μF, CO = 0.1 μF, unless otherwise spec-

ified.

Notes:

10. Load and line re gulati on are s pecifi ed at co nstan t junction temperature . Cha nges in VO due to heating effects must

be taken into account separately. Pulse testing with low duty is used.

11. These parameters, although guaranteed, are not 100% tested in production.

Symbol Parameter Conditions Min. Typ. Max. Unit

VOOutput Voltage TJ = +25°C 9.6 10.0 10.4 V

IO = 5 mA to 1 A, PO ≤ 15 W,

VI = 12.5 V to 25 V 9.5 10.0 10.5

Regline Line Regulation(10) TJ = +25°CVI = 12.5 V to 25 V 10 200 mV

VI = 13 V to 25 V 3 100

Regload Load Regulation(10) TJ = +2 5°C IO = 5 mA to 1.5 A 12 200 mV

IO = 250 mA to 750 mA 4 400

IQQuiescent Current TJ = +25°C5.18.0mA

ΔIQQuiescent Current

Change IO = 5 mA to 1 A 0.5 mA

VI = 12.5 V to 29 V 1.0

ΔVO/ΔT Output Voltage Drift(11) IO = 5 mA -1 mV/°C

VNOutput Noise Voltage f = 10 Hz to 100 kHz, TA = +25°C58μV

RR Ripple Rejection(11) f = 120 Hz, VI = 13 V to 23 V 56 71 dB

VDROP Dropout Voltage IO = 1 A, TJ = +25°C2V

ROOutput Resistance(11) f = 1 kHz 17 mΩ

ISC Short-Circ uit Current VI = 35 V, TJ = +25°C250mA

IPK Peak Current(11) TJ = +25°C2.2A

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 8

Electrical Characteristics (LM7812)

Refer to the test circuit, -40°C < T J < 125°C, IO = 500 mA, V I = 19 V, CI = 0.3 3 μF, CO = 0.1 μF, unless otherwise spec-

ified.

Notes:

12. Load and line re gulati on are s pecifi ed at co nstan t junction temperature . Cha nges in VO due to heating effects must

be taken into account separately. Pulse testing with low duty is used.

13. These parameters, although guaranteed, are not 100% tested in production.

Symbol Parameter Conditions Min. Typ. Max. Unit

VOOutput Voltage TJ = +25°C 11.5 12.0 12.5 V

IO = 5 mA to 1 A, PO ≤ 15 W,

VI = 14.5 V to 27 V 11.4 12.0 12.6

Regline Line Regulation(12) TJ = +25°CVI = 14.5 V to 30 V 10 240 mV

VI = 16 V to 22 V 3 120

Regload Load Regulation(12) TJ = +2 5°C IO = 5 mA to 1.5 A 11 240 mV

IO = 250 mA to 750 mA 5 120

IQQuiescent Current TJ = +25°C5.18.0mA

ΔIQQuiescent Current

Change IO = 5 mA to 1 A 0.1 0. 5 mA

VI = 14.5 V to 30 V 0.5 1 .0

ΔVO/ΔT Output Voltage Drift(13) IO = 5 mA -1 mV/°C

VNOutput Noise Voltage f = 10 Hz to 100 kHz, TA = +25°C76μV

RR Ripple Rejection(13) f = 120 Hz, VI = 15 V to 25 V 55 71 dB

VDROP Dropout Voltage IO = 1 A, TJ = +25°C2V

ROOutput Resistance(13) f = 1 kHz 18 mΩ

ISC Short-Circ uit Current VI = 35 V, TJ = +25°C230mA

IPK Peak Current(13) TJ = +25°C2.2A

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 9

Electrical Characteristics (LM7815)

Refer to the test circuit, -40°C < T J < 125°C, IO = 500 mA, V I = 23 V, CI = 0.3 3 μF, CO = 0.1 μF, unless otherwise spec-

ified.

Notes:

14. Load and line re gulati on are s pecifi ed at co nstan t junction temperature . Cha nges in VO due to heating effects must

be taken into account separately. Pulse testing with low duty is used.

15. These parameters, although guaranteed, are not 100% tested in production.

Symbol Parameter Conditions Min. Typ. Max. Unit

VOOutput Voltage TJ = +25°C 14.40 15.00 15.60 V

IO = 5 mA to 1 A, PO ≤ 15 W,

VI = 17.5 V to 30 V 14.25 15.00 15.75

Regline Line Regulation(14) TJ = +25°CVI = 17.5 V to 30 V 11 300 mV

VI = 20 V to 26 V 3 150

Regload Load Regulation(14) TJ = +2 5°C IO = 5 mA to 1.5 A 12 300 mV

IO = 250 mA to 750 mA 4 150

IQQuiescent Current TJ = +25°C5.28.0mA

ΔIQQuiescent Current

Change IO = 5 mA to 1 A 0.5 mA

VI = 17.5 V to 30 V 1.0

ΔVO/ΔT Output Voltage Drift(15) IO = 5 mA -1 mV/°C

VNOutput Noise Voltage f = 10 Hz to 100 kHz, TA = +25°C90μV

RR Ripple Rejection(15) f = 120 Hz, VI = 18.5 V to 28.5 V 54 70 dB

VDROP Dropout Voltage IO = 1 A, TJ = +25°C2V

ROOutput Resistance(15) f = 1 kHz 19 mΩ

ISC Short-Circ uit Current VI = 35 V, TJ = +25°C250mA

IPK Peak Current(15) TJ = +25°C2.2A

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 10

Electrical Characteristics (LM7818)

Refer to the test circuit, -40°C < T J < 125°C, IO = 500 mA, V I = 27 V, CI = 0.3 3 μF, CO = 0.1 μF, unless otherwise spec-

ified.

Notes:

16. Load and line re gulati on are s pecifi ed at co nstan t junction temperature . Cha nges in VO due to heating effects must

be taken into account separately. Pulse testing with low duty is used.

17. These parameters, although guaranteed, are not 100% tested in production.

Symbol Parameter Conditions Min. Typ. Max. Unit

VOOutput Voltage TJ = +25°C 17.3 18.0 18.7 V

IO = 5 mA to 1 A, PO ≤ 15 W,

VI = 21 V to 33 V 17.1 18.0 18.9

Regline Line Regulation(16) TJ = +25°CVI = 21 V to 33 V 15 360 mV

VI = 24 V to 30 V 5 180

Regload Load Regulation(16) TJ = +2 5°C IO = 5 mA to 1.5 A 15 360 mV

IO = 250 mA to 750 mA 5 180

IQQuiescent Current TJ = +25°C5.28.0mA

ΔIQQuiescent Current

Change IO = 5 mA to 1 A 0.5 mA

VI = 21 V to 33 V 1.0

ΔVO/ΔT Output Voltage Drift(17) IO = 5 mA -1 mV/°C

VNOutput Noise Voltage f = 10 Hz to 100 kHz, TA = +25°C110μV

RR Ripple Rejection(17) f = 120 Hz, VI = 22 V to 32 V 53 69 dB

VDROP Dropout Voltage IO = 1 A, TJ = +25°C2V

ROOutput Resistance(17) f = 1 kHz 22 mΩ

ISC Short-Circ uit Current VI = 35 V, TJ = +25°C250mA

IPK Peak Current(17) TJ = +25°C2.2A

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 11

Electrical Characteristics (LM7824)

Refer to the test circuit, -40°C < T J < 125°C, IO = 500 mA, V I = 33 V, CI = 0.3 3 μF, CO = 0.1 μF, unless otherwise spec-

ified.

Notes:

18. Load and line re gulati on are s pecifi ed at co nstan t junction temperature . Cha nges in VO due to heating effects must

be taken into account separately. Pulse testing with low duty is used.

19. These parameters, although guaranteed, are not 100% tested in production.

Symbol Parameter Conditions Min. Typ. Max. Unit

VOOutput Voltage TJ = +25°C 23.00 24.00 25.00 V

IO = 5 mA to 1 A, PO ≤ 15 W,

VI = 27 V to 38 V 22.80 24.00 25.25

Regline Line Regulation(18) TJ = +25°CVI = 27 V to 38 V 17 480 mV

VI = 30 V to 36 V 6 240

Regload Load Regulation(18) TJ = +2 5°C IO = 5 mA to 1.5 A 15 480 mV

IO = 250 mA to 750 mA 5 240

IQQuiescent Current TJ = +25°C5.28.0mA

ΔIQQuiescent Current

Change IO = 5 mA to 1 A 0.1 0. 5 mA

VI = 27 V to 38 V 0.5 1.0

ΔVO/ΔT Output Voltage Drift(19) IO = 5 mA -1.5 mV/°C

VNOutput Noise Voltage f = 10 Hz to 100 kHz, TA = +25°C120μV

RR Ripple Rejection(19) f = 120 Hz, VI = 28 V to 38 V 50 67 dB

VDROP Dropout Voltage IO = 1 A, TJ = +25°C2V

ROOutput Resistance(19) f = 1 kHz 28 mΩ

ISC Short-Circ uit Current VI = 35 V, TJ = +25°C230mA

IPK Peak Current(19) TJ = +25°C2.2A

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 12

Electrical Characteristics (LM7805A)

Refer to the test circuit, 0°C < TJ < 125°C, IO = 1 A, VI = 10 V, CI = 0.33 μF, CO = 0.1 μF, unless otherwise specified.

Notes:

20. Load and line re gulati on are s pecifi ed at co nstan t junction temperature . Cha nges in VO due to heating effects must

be taken into account separately. Pulse testing with low duty is used.

21. These parameters, although guaranteed, are not 100% tested in production.

Symbol Parameter Conditions Min. Typ. Max. Unit

VOOutput Voltage TJ = +25°C 4.9 5.0 5.1 V

IO = 5 mA to 1 A, PO ≤ 15 W,

VI = 7.5 V to 20 V 4.8 5.0 5.2

Regline Line Regulation(20)

VI = 7.5 V to 25 V, IO = 500 mA 5.0 50.0

VI = 8 V to 12 V 3.0 50.0

TJ = +25°CVI = 7.3 V to 20 V 5.0 50.0

VI = 8 V to 12 V 1.5 25.0

Regload Load Regulation(20) TJ = +2 5°C, IO = 5 mA to 1.5 A 9 100 mVIO = 5 mA to 1 A 9 100

IO = 250 mA to 750 mA 4 50

IQQuiescent Current TJ = +25°C56mA

ΔIQQuiescent Current

Change

IO = 5 mA to 1 A 0.5 mAVI = 8 V to 25 V, IO = 500 mA 0.8

VI = 7.5 V to 20 V, TJ = +25°C0.8

ΔVO/ΔT Output Voltage Drift(21) IO = 5 mA -0.8 mV/°C

VNOutput Noise Voltage f = 10 Hz to 100 kHz, TA = +25°C42μV

RR Ripple Rejection(21) f = 120 Hz, VO = 500 mA,

VI =8 V to 18 V 68 dB

VDROP Dropout Voltage IO = 1 A, TJ = +25°C2V

ROOutput Resistance(21) f = 1 kHz 17 mΩ

ISC Short-Circ uit Current VI = 35 V, TJ = +25°C250mA

IPK Peak Current(21) TJ = +25°C2.2A

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 13

Electrical Characteristics (LM7809A)

Refer to the test circuit, 0°C < TJ < 125°C, IO = 1 A, VI = 15 V, CI = 0.33 μF, CO = 0.1 μF, unless otherwise specified.

Notes:

22. Load and line re gulati on are s pecifi ed at co nstan t junction temperature . Cha nges in VO due to heating effects must

be taken into account separately. Pulse testing with low duty is used.

23. These parameters, although guaranteed, are not 100% tested in production.

Symbol Parameter Conditions Min. Typ. Max. Unit

VOOutput Voltage TJ = +25°C 8.829.009.16 V

IO = 5 mA to 1 A, PO ≤ 15 W,

VI = 11.2 V to 24 V 8.65 9.00 9.35

Regline Line Regulation(22)

VI = 11.7 V to 25 V, IO = 50 0 mA 6 90

VI = 12.5 V to 19 V 4 45

TJ = +25°CVI = 11.5 V to 24 V 6 90

VI = 12.5 V to 19 V 2 45

Regload Load Regulation(22) TJ = +2 5°C, IO = 5 mA to 1.5 A 12 100 mVIO = 5 mA to 1 A 12 100

IO = 250 mA to 750 mA 5 50

IQQuiescent Current TJ = +25°C56mA

ΔIQQuiescent Current

Change

IO = 5 mA to 1 A 0.5 mAVI = 12 V to 25 V, IO = 500 mA 0.8

VI = 11.7 V to 25 V, TJ = +25°C0.8

ΔVO/ΔT Output Voltage Drift(23) IO = 5 mA -1 mV/°C

VNOutput Noise Voltage f = 10 Hz to 100 kHz, TA = +25°C58μV

RR Ripple Rejection(23) f = 120 Hz, VO = 500 mA,

VI =12 V to 22 V 62 dB

VDROP Dropout Voltage IO = 1 A, TJ = +25°C2V

ROOutput Resistance(23) f = 1 kHz 17 mΩ

ISC Short-Circ uit Current VI = 35 V, TJ = +25°C250mA

IPK Peak Current(23) TJ = +25°C2.2A

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 14

Electrical Characteristics (LM7810A)

Refer to the test circuit, 0°C < TJ < 125°C, IO = 1 A, VI = 16 V, CI = 0.33 μF, CO = 0.1 μF, unless otherwise specified.

Notes:

24. Load and line re gulati on are s pecifi ed at co nstan t junction temperature . Cha nges in VO due to heating effects must

be taken into account separately. Pulse testing with low duty is used.

25. These parameters, although guaranteed, are not 100% tested in production.

Symbol Parameter Conditions Min. Typ. Max. Unit

VOOutput Voltage TJ = +25°C 9.8 10.0 10.2 V

IO = 5 mA to 1 A, PO ≤ 15 W,

VI = 12.8 V to 25 V 9.6 10.0 10.4

Regline Line Regulation(24)

VI = 12.8 V to 26 V, IO = 50 0 mA 8 100

VI = 13 V to 20 V 4 50

TJ = +25°CVI = 12.5 V to 25 V 8 100

VI = 13 V to 20 V 3 50

Regload Load Regulation(24) TJ = +2 5°C, IO = 5 mA to 1.5 A 12 100 mVIO = 5 mA to 1 A 12 100

IO = 250 mA to 750 mA 5 50

IQQuiescent Current TJ = +25°C56mA

ΔIQQuiescent Current

Change

IO = 5 mA to 1 A 0.5 mAVI = 12.8 V to 25 V, IO = 500 mA 0.8

VI = 13 V to 26 V, TJ = +25°C0.5

ΔVO/ΔT Output Voltage Drift(25) IO = 5 mA -1 mV/°C

VNOutput Noise Voltage f = 10 Hz to 100 kHz, TA = +25°C58μV

RR Ripple Rejection(25) f = 120 Hz, VO = 500 mA,

VI =14 V to 24 V 62 dB

VDROP Dropout Voltage IO = 1 A, TJ = +25°C2V

ROOutput Resistance(25) f = 1 kHz 17 mΩ

ISC Short-Circ uit Current VI = 35 V, TJ = +25°C250mA

IPK Peak Current(25) TJ = +25°C2.2A

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 15

Electrical Characteristics (LM7812A)

Refer to the test circuit, 0°C < TJ < 125°C, IO = 1 A, VI = 19 V, CI = 0.33 μF, CO = 0.1 μF, unless otherwise specified.

Notes:

26. Load and line re gulati on are s pecifi ed at co nstan t junction temperature . Cha nges in VO due to heating effects must

be taken into account separately. Pulse testing with low duty is used.

27. These parameters, although guaranteed, are not 100% tested in production.

Symbol Parameter Conditions Min. Typ. Max. Unit

VOOutput Voltage TJ = +25°C 11.75 12.00 12.25 V

IO = 5 mA to 1 A, PO ≤ 15 W,

VI = 14.8 V to 27 V 11.50 12.00 12.50

Regline Line Regulation(26)

VI = 14.8 V to 30 V, IO = 50 0 mA 10 120

VI = 16 V to 22 V 4 120

TJ = +25°CVI = 14.5 V to 27 V 10 120

VI = 16 V to 22 V 3 60

Regload Load Regulation(26) TJ = +2 5°C, IO = 5 mA to 1.5 A 12 100 mVIO = 5 mA to 1 A 12 100

IO = 250 mA to 750 mA 5 50

IQQuiescent Current TJ = +25°C56mA

ΔIQQuiescent Current

Change

IO = 5 mA to 1 A 0.5 mAVI = 14 V to 27 V, IO = 500 mA 0.8

VI = 15 V to 30 V, TJ = +25°C0.8

ΔVO/ΔT Output Voltage Drift(27) IO = 5 mA -1 mV/°C

VNOutput Noise Voltage f = 10 Hz to 100 kHz, TA = +25°C76μV

RR Ripple Rejection(27) f = 120 Hz, VO = 500 mA,

VI =14 V to 24 V 60 dB

VDROP Dropout Voltage IO = 1 A, TJ = +25°C2V

ROOutput Resistance(27) f = 1 kHz 18 mΩ

ISC Short-Circ uit Current VI = 35 V, TJ = +25°C250mA

IPK Peak Current(27) TJ = +25°C2.2A

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 16

Electrical Characteristics (LM7815A)

Refer to the test circuit, 0°C < TJ < 125°C, IO = 1 A, VI = 23 V, CI = 0.33 μF, CO = 0.1 μF, unless otherwise specified.

Notes:

28. Load and line re gulati on are s pecifi ed at co nstan t junction temperature . Cha nges in VO due to heating effects must

be taken into account separately. Pulse testing with low duty is used.

29. These parameters, although guaranteed, are not 100% tested in production.

Symbol Parameter Conditions Min. Typ. Max. Unit

VOOutput Voltage TJ = +25°C 14.75 15.00 15.30 V

IO = 5 mA to 1 A, PO ≤ 15 W,

VI = 17.7 V to 30 V 14.40 15.00 15.60

Regline Line Regulation(28)

VI = 17.4 V to 30 V, IO = 50 0 mA 10 150

VI = 20 V to 26 V 5 150

TJ = +25°CVI = 17.5 V to 30 V 11 150

VI = 20 V to 26 V 3 75

Regload Load Regulation(28) TJ = +2 5°C, IO = 5 mA to 1.5 A 12 100 mVIO = 5 mA to 1 A 12 100

IO = 250 mA to 750 mA 5 50

IQQuiescent Current TJ = +25°C5.26.0mA

ΔIQQuiescent Current

Change

IO = 5 mA to 1 A 0.5 mAVI = 17.5 V to 30 V, IO = 500 mA 0.8

VI = 17.5 V to 30 V, TJ = +25°C0.8

ΔVO/ΔT Output Voltage Drift(29) IO = 5 mA -1 mV/°C

VNOutput Noise Voltage f = 10 Hz to 100 kHz, TA = +25°C90μV

RR Ripple Rejection(29) f = 120 Hz, VO = 500 mA,

VI =18.5 V to 28.5 V 58 dB

VDROP Dropout Voltage IO = 1 A, TJ = +25°C2V

ROOutput Resistance(29) f = 1 kHz 19 mΩ

ISC Short-Circ uit Current VI = 35 V, TJ = +25°C250mA

IPK Peak Current(29) TJ = +25°C2.2A

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 17

Typical Performance Characteristics

Figure 2. Quiescent Current Figure 3. Pea k Output Current

Figure 4. Output Voltage Figure 5. Quiescent Current

5.75

5.5

5.25

4.75

4.5

VI = 10V

VO = 5V

IO = 5mA

-25-50 0 25 50 75 100 125

QUIESCENT CURRENT (mA)

JUNCTION TEMPERATURE (°C)

2.5

1.5

TJ = 25°C

ΔVO = 100mV

5 101520253035

OUTPUT CURRENT (A)

INPUT-OUTPUT DIFFERENTIAL (V)

1.02

1.01

0.99

0.98

VI – VO = 5V

IO = 5mA

-25-50 0 25 50 75 100 125

NORMALIZED OUTPUT VOLTAGE (V)

JUNCTION TEMPERATURE (°C)

6.5

5.5

4.5

TJ = 25°C

VO = 5V

IO = 10mA

1051520253035

QUIESCENT CURRENT (mA)

INPUT VOLTAGE (V)

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 18

Typical Applications

Figure 6. DC Parameters

Figure 7. Load Regulation

Figure 8. Ripple Rejection

0.1μF

CI0.33μF

Output

Input

LM78XX

0.33μF

270pF

100Ω30μS

2N6121

or EQ

Output

Input

LM78XX

Output

Input

5.1Ω

0.33μF 2

470μF

120Hz +

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 19

Typical Applications (Continued)

Figure 9. Fixed-Output Regulator

Figure 10. Constant Current Regulator

Notes:

29. To specify an out put volt age, substitute volta ge value for “XX”. A common ground is requ ired between the input and

the output voltage. The input volt age mu st remain typi cally 2.0 V above t he output volt age even durin g the low point

on the input ripple voltage.

30. CI is required if regulator is located an appreciable distance from power supply filter.

31. CO improves stability and transient response.

Figure 11. Circuit for Increasing Output Voltage

0.1μF

CI0.33μF

Output

Input

LM78XX

0.1μF

CI0.33μF

Output

Input

LM78XX

2VXX

IO = R1 +IQ

VXX

0.1μF

CI0.33μF

Output

Input

LM78XX

2VXX R1

IRI ≥ 5 IQ

VO = VXX(1 + R2 / R1) + IQR2

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 20

Typical Applications (Continued)

Figure 12. Adjustable Output Regulator (7 V to 30 V)

Figure 13. High-Current Voltage Regulator

Figure 14. High Output Current with Short-Circuit Protection

LM741

0.33μF

Input Output

0.1μF

LM7805

10kΩ

IRI ≥ 5 IQ

VO = VXX(1 + R2 / R1) + IQR2

LM78XX

Output

Input

3Ω

0.33μF

IREG

0.1μF

IQ1

IO = IREG + BQ1 (IREG–VBEQ1/R1)

Q1 BD536

R1 = VBEQ1

IREG–IQ1 BQ1

LM78XX

Output

0.1μF

0.33μF

3Ω

Input

Q1 = TIP42

Q2 = TIP42

RSC = I

VBEQ2

RSC

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 21

Typical Applications (Continued)

Figure 15. Tracking Voltage Regulator

Figure 16. Sp lit Power Supply (±15 V - 1 A)

LM78XX

LM741

0.1μF

0.33μF

434.7kΩ

4.7kΩ

TIP42

COMMON

-VO

-VIN

0.33μF 0.1μF

2.2μF

1μF +

1N4001

+15V

-15V

+20V

-20V

LM7815

MC7915

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 22

Typical Applications (Continued)

Figure 17. Negative Output Voltage Circuit

Figure 18. Switching Regulator

LM78XX

Output

Input

0.1μF

LM78XX

1mH

2000μF

Output

Input D45H11

0.33μF

470Ω

4.7Ω

10μF

0.5Ω

LM78XX / LM78XXA — 3-Terminal 1 A Positive Voltage Regulator

LM78XX / LM78XXA Rev . 1.3.1 23

Physical Dimensions

Figure 19. TO-220, MOLDED, 3-LEAD, JEDEC VARIATION AB (ACTIVE)

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