ST MICROELECTRONICS L7812CP STM Datasheet

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Features

■ Output current to 1.5 A

■ Output voltages of 5; 6; 8; 8.5; 9; 12; 15; 18;

24 V

■ Thermal overload protection

■ Short circuit protection

■ Output transition SOA protection

Description

The L78xx series of three-terminal positive regulators is available in TO-220, TO-220FP, TO-3, D fixed output voltages, making it useful in a wide range of applications. These regulators can provide local on-card regulation, eliminating the distribution problems associated with single point regulation. Each type employs internal current limiting, thermal shut-down and safe area protection, making it essentially indestructible. 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 external components to obtain adjustable voltage and currents.

PAK and DPAK packages and several

L78xx

L78xxC

Positive voltage regulators

TO-220

TO-3

DPAK

TO-220FP

D²PAK

Table 1. Device summary

Part numbers

L7805 L7809C

L7805C L7812C

L7806C L7815C

L7808C L7818C

L7885C L7824C

March 2008 Rev 19 1/56

www.st.com

Contents L78xx - L78xxC

Contents

1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

8 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

2/56

L78xx - L78xxC List of figures

List of figures

Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 2. Pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 3. Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 4. Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 5. DC parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 6. Load regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 7. Ripple rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 8. Dropout voltage vs junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 9. Peak output current vs input/output differential voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 10. Supply voltage rejection vs frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 11. Output voltage vs junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 12. Output impedance vs frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 13. Quiescent current vs junction temp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 14. Load transient response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 15. Line transient response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 16. Quiescent current vs input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 17. Fixed output regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 18. Current regulator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 19. Circuit for increasing output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 20. Adjustable output regulator (7 to 30 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 21. 0.5 to 10 V regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 22. High current voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 23. High output current with short circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 24. Tracking voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 25. Split power supply (± 15 V - 1 A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 26. Negative output voltage circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 27. Switching regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 28. High input voltage circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 29. High input voltage circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 30. High output voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 31. High input and output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 32. Reducing power dissipation with dropping resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 33. Remote shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 34. Power AM modulator (unity voltage gain, I

Figure 35. Adjustable output voltage with temperature compensation . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 36. Light controllers (V

Figure 37. Protection against input short-circuit with high capacitance loads . . . . . . . . . . . . . . . . . . . 38

Figure 38. Drawing dimension TO-220 (type SMIC-subcon.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 39. Drawing dimension TO-220 (type STD-ST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 40. Drawing dimension TO-220FP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 41. Drawing dimension TO-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 42. Drawing dimension DPAK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Figure 43. Drawing dimension tape and reel for DPAK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 44. Drawing dimension D²PAK (type STD-ST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 45. Drawing dimension D²PAK (type WOOSEOK-Subcon.). . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 46. D²PAK footprint recommended data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Figure 47. Drawing dimension tape and reel for D²PAK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

= VXX + VBE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Omin

≤ 0.5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

3/56

List of tables L78xx - L78xxC

List of tables

Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Table 2. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Table 3. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Table 4. Electrical characteristics of L7805 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Table 5. Electrical characteristics of L7806 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Table 6. Electrical characteristics of L7808 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 7. Electrical characteristics of L7812 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Table 8. Electrical characteristics of L7815 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 9. Electrical characteristics of L7818 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Table 10. Electrical characteristics of L7820 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Table 11. Electrical characteristics of L7824 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 12. Electrical characteristics of L7805C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Table 13. Electrical characteristics of L7852C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 14. Electrical characteristics of L7806C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 15. Electrical characteristics of L7808C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 16. Electrical characteristics of L7885C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 17. Electrical characteristics of L7809C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Table 18. Electrical characteristics of L7810C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 19. Electrical characteristics of L7812C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 20. Electrical characteristics of L7815C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 21. Electrical characteristics of L7818C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 22. Electrical characteristics of L7820C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 23. Electrical characteristics of L7824C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Table 24. TO-220 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Table 25. TO-220FP mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Table 26. TO-3 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Table 27. DPAK mechanical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Table 28. Tape and reel DPAK mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Table 29. D²PAK mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Table 30. D²PAK footprint data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Table 31. Tape and reel D²PAK mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Table 32. Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Table 33. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

4/56

L78xx - L78xxC Diagram

1 Diagram

Figure 1. Block diagram

5/56

Pin configuration L78xx - L78xxC

2 Pin configuration

Figure 2. Pin connections (top view)

TO-220

D2PAK (Any Type)

Figure 3. Schematic diagram

DPAK

TO-220FP

TO-3

6/56

L78xx - L78xxC Maximum ratings

3 Maximum ratings

Table 2. Absolute maximum ratings

Symbol Parameter Value Unit

for V

= 5 to 18 V 35

= 20, 24 V 40

for V

for L7800 -55 to 150

for L7800C 0 to 150

°C

STG

DC input voltage

Output current Internally limited

Power dissipation Internally limited

Storage temperature range -65 to 150 °C

Operating junction temperature range

Note: Absolute maximum ratings are those values beyond which damage to the device may occur.

Functional operation under these condition is not implied.

Table 3. Thermal data

Symbol Parameter D2PAK DPAK TO-220 TO-220FP TO-3 Unit

Thermal resistance junction-case 3 8 5 5 4 °C/W

thJC

Thermal resistance junction-ambient 62.5 100 50 60 35 °C/W

thJA

Figure 4. Application circuits

7/56

Test circuits L78xx - L78xxC

4 Test circuits

Figure 5. DC parameter

Figure 6. Load regulation

Figure 7. Ripple rejection

8/56

L78xx - L78xxC Electrical characteristics

5 Electrical characteristics

Table 4. Electrical characteristics of L7805 (refer to the test circuits, TJ = -55 to 150 °C, VI = 10 V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

Output voltage TJ = 25°C 4.8 5 5.2 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 6 mA

= 8 to 20 V

= 7 to 25 V, TJ = 25°C 3 50

= 8 to 12 V, TJ = 25°C 1 25

= 5 mA to 1.5 A, TJ = 25°C 100

= 250 to 750 mA, TJ = 25°C 25

4.65 5 5.35 V

IO = 5 mA to 1 A 0.5

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100 kHz, T

Quiescent current change

/ΔT Output voltage drift IO = 5 mA 0.6 mV/°C

= 8 to 25 V 0.8

= 25°C 40 µV/V

SVR Supply voltage rejection VI = 8 to 18 V, f = 120 Hz 68 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 2.5 V

Output resistance f = 1 kHz 17 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.75 1.2 A

Short circuit peak current TJ = 25°C 1.3 2.2 3.3 A

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Electrical characteristics L78xx - L78xxC

Table 5. Electrical characteristics of L7806 (refer to the test circuits, TJ = -55 to 150 °C, VI = 11 V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100 kHz, T

Output voltage TJ = 25°C 5.75 6 6.25 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 6 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA 0.7 mV/°C

= 9 to 21 V

= 8 to 25 V, TJ = 25°C 60

= 9 to 13 V, TJ = 25°C 30

= 5 mA to 1.5 A, TJ = 25°C 100

= 250 to 750 mA, TJ = 25°C 30

= 5 mA to 1 A 0.5

= 9 to 25 V 0.8

= 25°C 40 µV/V

5.65 6 6.35 V

SVR Supply voltage rejection VI = 9 to 19 V, f = 120 Hz 65 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 2.5 V

Output resistance f = 1 kHz 19 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.75 1.2 A

Short circuit peak current TJ = 25°C 1.3 2.2 3.3 A

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L78xx - L78xxC Electrical characteristics

Table 6. Electrical characteristics of L7808 (refer to the test circuits, TJ = -55 to 150 °C, VI = 14V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100 kHz, T

Output voltage TJ = 25°C 7.7 8 8.3 V

= 5 mA to 1A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 6 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA 1 mV/°C

= 11.5 to 23 V

= 10.5 to 25 V, TJ = 25°C 80

= 11 to 17 V, TJ = 25°C 40

= 5 mA to 1.5 A, TJ = 25°C 100

= 250 to 750 mA, TJ = 25°C 40

= 5 mA to 1 A 0.5

= 11.5 to 25 V 0.8

= 25°C 40 µV/V

7.6 8 8.4 V

SVR Supply voltage rejection VI = 11.5 to 21.5 V, f = 120 Hz 62 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 2.5 V

Output resistance f = 1 kHz 16 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.75 1.2 A

Short circuit peak current TJ = 25°C 1.3 2.2 3.3 A

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Electrical characteristics L78xx - L78xxC

Table 7. Electrical characteristics of L7812 (refer to the test circuits, TJ = -55 to 150 °C, VI = 19 V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100 kHz, T

Output voltage TJ = 25°C 11.5 12 12.5 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 6 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA 1.5 mV/°C

= 15.5 to 27 V

= 14.5 to 30 V, TJ = 25°C 120

= 16 to 22 V, TJ = 25°C 60

= 5 mA to 1.5 A, TJ = 25°C 100

= 250 to 750 mA, TJ = 25°C 60

= 5 mA to 1 A 0.5

= 15 to 30 V 0.8

= 25°C 40 µV/V

11.4 12 12.6 V

SVR Supply voltage rejection VI = 15 to 25 V, f = 120 Hz 61 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 2.5 V

Output resistance f = 1 kHz 18 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.75 1.2 A

Short circuit peak current TJ = 25°C 1.3 2.2 3.3 A

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L78xx - L78xxC Electrical characteristics

Table 8. Electrical characteristics of L7815 (refer to the test circuits, TJ = -55 to 150 °C, VI = 23 V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100 kHz, T

Output voltage TJ = 25°C 14.4 15 15.6 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 6 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA 1.8 mV/°C

= 18.5 to 30 V

= 17.5 to 30 V, TJ = 25°C 150

= 20 to 26 V, TJ = 25°C 75

= 5 mA to 1.5 A, TJ = 25°C 150

= 250 to 750 mA, TJ = 25°C 75

= 5 mA to 1 A 0.5

= 18.5 to 30 V 0.8

= 25°C 40 µV/V

14.25 15 15.75 V

SVR Supply voltage rejection VI = 18.5 to 28.5 V, f = 120 Hz 60 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 2.5 V

Output resistance f = 1 kHz 19 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.75 1.2 A

Short circuit peak current TJ = 25°C 1.3 2.2 3.3 A

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Electrical characteristics L78xx - L78xxC

Table 9. Electrical characteristics of L7818 (refer to the test circuits, TJ = -55 to 150 °C, VI = 26 V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100 kHz, T

Output voltage TJ = 25°C 17.3 18 18.7 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 6 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA 2.3 mV/°C

= 22 to 33 V

= 21 to 33 V, TJ = 25°C 180

= 24 to 30 V, TJ = 25°C 90

= 5 mA to 1.5 A, TJ = 25°C 180

= 250 to 750 mA, TJ = 25°C 90

= 5 mA to 1 A 0.5

= 22 to 33 V 0.8

= 25°C 40 µV/V

17.1 18 18.9 V

SVR Supply voltage rejection VI = 22 to 32 V, f = 120 Hz 59 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 2.5 V

Output resistance f = 1 kHz 22 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.75 1.2 A

Short circuit peak current TJ = 25°C 1.3 2.2 3.3 A

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L78xx - L78xxC Electrical characteristics

Table 10. Electrical characteristics of L7820 (refer to the test circuits, TJ = -55 to 150 °C, VI = 28 V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100 kHz, T

Output voltage TJ = 25°C 19.2 20 20.8 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 6 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA 2.5 mV/°C

= 24 to 35 V

= 22.5 to 35 V, TJ = 25°C 200

= 26 to 32 V, TJ = 25°C 100

= 5 mA to 1.5 A, TJ = 25°C 200

= 250 to 750 mA, TJ = 25°C 100

= 5 mA to 1 A 0.5

= 24 to 35 V 0.8

= 25°C 40 µV/V

19 20 21 V

SVR Supply voltage rejection VI = 24 to 35 V, f = 120 Hz 58 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 2.5 V

Output resistance f = 1 kHz 24 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.75 1.2 A

Short circuit peak current TJ = 25°C 1.3 2.2 3.3 A

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Electrical characteristics L78xx - L78xxC

Table 11. Electrical characteristics of L7824 (refer to the test circuits, TJ = -55 to 150 °C, VI = 33 V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100 kHz, T

Output voltage TJ = 25°C 23 24 25 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 6 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA 3 mV/°C

= 28 to 38 V

= 27 to 38 V, TJ = 25°C 240

= 30 to 36 V, TJ = 25°C 120

= 5 mA to 1.5 A, TJ = 25°C 240

= 250 to 750 mA, TJ = 25°C 120

= 5 mA to 1 A 0.5

= 28 to 38 V 0.8

= 25°C 40 µV/V

22.8 24 25.2 V

SVR Supply voltage rejection VI = 28 to 38 V, f = 120 Hz 56 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 2.5 V

Output resistance f = 1 kHz 28 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.75 1.2 A

Short circuit peak current TJ = 25°C 1.3 2.2 3.3 A

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L78xx - L78xxC Electrical characteristics

Table 12. Electrical characteristics of L7805C (refer to the test circuits, T

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

= 0 to 150 °C, VI = 10 V,

ΔV

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100 kHz, T

Output voltage TJ = 25°C 4.8 5 5.2 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 8 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA -1.1 mV/°C

= 7 to 20 V

= 7 to 25 V, TJ = 25°C 3 100

= 8 to 12 V, TJ = 25°C 1 50

= 5 mA to 1.5 A, TJ = 25°C 100

= 250 to 750 mA, TJ = 25°C 50

= 5 mA to 1 A 0.5

= 7 to 25 V 0.8

= 25°C 40 µV/V

4.75 5 5.25 V

SVR Supply voltage rejection VI = 8 to 18 V, f = 120 Hz 62 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 V

Output resistance f = 1 kHz 17 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.75 A

Short circuit peak current TJ = 25°C 2.2 A

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Electrical characteristics L78xx - L78xxC

Table 13. Electrical characteristics of L7852C (refer to the test circuits, T

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

= 0 to 150 °C, VI = 10 V,

ΔV

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100 kHz, T

Output voltage TJ = 25°C 5.0 5.2 5.4 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 8 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA -1 mV/°C

= 8 to 20 V

= 7 to 25 V, TJ = 25°C 3 105

= 8 to 12 V, TJ = 25°C 1 52

= 5 mA to 1.5 A, TJ = 25°C 105

= 250 to 750 mA, TJ = 25°C 52

= 5 mA to 1 A 0.5

= 7 to 25 V 1.3

= 25°C 42 µV/V

4.95 5.2 5.45 V

SVR Supply voltage rejection VI = 8 to 18 V, f = 120 Hz 61 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 V

Output resistance f = 1 kHz 17 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.75 A

Short circuit peak current TJ = 25°C 2.2 A

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L78xx - L78xxC Electrical characteristics

Table 14. Electrical characteristics of L7806C (refer to the test circuits, TJ = 0 to 150 °C, VI = 11 V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100 kHz, T

Output voltage TJ = 25°C 5.75 6 6.25 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 8 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA -0.8 mV/°C

= 8 to 21 V

= 8 to 25 V, TJ = 25°C 120

= 9 to 13 V, TJ = 25°C 60

= 5 mA to 1.5 A, TJ = 25°C 120

= 250 to 750 mA, TJ = 25°C 60

= 5 mA to 1 A 0.5

= 8 to 25 V 1.3

= 25°C 45 µV/V

5.7 6 6.3 V

SVR Supply voltage rejection VI = 9 to 19 V, f = 120 Hz 59 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 V

Output resistance f = 1 kHz 19 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.55 A

Short circuit peak current TJ = 25°C 2.2 A

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Electrical characteristics L78xx - L78xxC

Table 15. Electrical characteristics of L7808C (refer to the test circuits, TJ = 0 to 150 °C, VI = 14 V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100 kHz, T

Output voltage TJ = 25°C 7.7 8 8.3 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 8 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA -0.8 mV/°C

= 10.5 to 25 V

= 10.5 to 25 V, TJ = 25°C 160

= 11 to 17 V, TJ = 25°C 80

= 5 mA to 1.5 A, TJ = 25°C 160

= 250 to 750 mA, TJ = 25°C 80

= 5 mA to 1 A 0.5

= 10.5 to 25 V 1

= 25°C 52 µV/V

7.6 8 8.4 V

SVR Supply voltage rejection VI = 11.5 to 21.5 V, f = 120 Hz 56 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 V

Output resistance f = 1 kHz 16 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.45 A

Short circuit peak current TJ = 25°C 2.2 A

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L78xx - L78xxC Electrical characteristics

Table 16. Electrical characteristics of L7885C (refer to the test circuits, TJ = 0 to 150 °C, VI = 14.5 V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100 kHz, T

Output voltage TJ = 25°C 8.2 8.5 8.8 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 8 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA -0.8 mV/°C

= 11 to 26 V

= 11 to 27 V, TJ = 25°C 160

= 11.5 to 17.5 V, TJ = 25°C 80

= 5 mA to 1.5 A, TJ = 25°C 160

= 250 to 750 mA, TJ = 25°C 80

= 5 mA to 1 A 0.5

= 11 to 27 V 1

= 25°C 55 µV/V

8.1 8.5 8.9 V

SVR Supply voltage rejection VI = 12 to 22V, f = 120Hz 56 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 V

Output resistance f = 1 kHz 16 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.45 A

Short circuit peak current TJ = 25°C 2.2 A

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Electrical characteristics L78xx - L78xxC

Table 17. Electrical characteristics of L7809C (refer to the test circuits, TJ = 0 to 150 °C, VI = 15 V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100 kHz, T

Output voltage TJ = 25°C 8.64 9 9.36 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 8 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA -1 mV/°C

= 11.5 to 26 V

= 11.5 to 26 V, TJ = 25°C 180

= 12 to 18 V, TJ = 25°C 90

= 5 mA to 1.5 A, TJ = 25°C 180

= 250 to 750 mA, TJ = 25°C 90

= 5 mA to 1 A 0.5

= 11.5 to 26 V 1

= 25°C 70 µV/V

8.55 9 9.45 V

SVR Supply voltage rejection VI = 12 to 23 V, f = 120 Hz 55 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 V

Output resistance f = 1 kHz 17 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.40 A

Short circuit peak current TJ = 25°C 2.2 A

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L78xx - L78xxC Electrical characteristics

Table 18. Electrical characteristics of L7810C (refer to the test circuits, TJ = 0 to 150 °C, VI = 15 V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100 kHz, T

Output voltage TJ = 25°C 9.6 10 10.4 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 8 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA -1 mV/°C

= 12.5 to 26 V

= 12.5 to 26 V, TJ = 25°C 200

= 13.5 to 19 V, TJ = 25°C 100

= 5 mA to 1.5 A, TJ = 25°C 200

= 250 to 750 mA, TJ = 25°C 100

= 5 mA to 1 A 0.5

= 12.5 to 26 V 1

= 25°C 70 µV/V

9.5 10 10.5 V

SVR Supply voltage rejection VI = 13 to 23 V, f = 120 Hz 55 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 V

Output resistance f = 1 kHz 17 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.40 A

Short circuit peak current TJ = 25°C 2.2 A

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Electrical characteristics L78xx - L78xxC

Table 19. Electrical characteristics of L7812C (refer to the test circuits, TJ = 0 to 150 °C, VI = 19 V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100 kHz, T

Output voltage TJ = 25°C 11.5 12 12.5 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 8 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA -1 mV/°C

= 14.5 to 27 V

= 14.5 to 30 V, TJ = 25°C 240

= 16 to 22 V, TJ = 25°C 120

= 5 mA to 1.5 A, TJ = 25°C 240

= 250 to 750 mA, TJ = 25°C 120

= 5 mA to 1 A 0.5

= 14.5 to 30 V 1

= 25°C 75 µV/V

11.4 12 12.6 V

SVR Supply voltage rejection VI = 15 to 25 V, f = 120 Hz 55 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 V

Output resistance f = 1 kHz 18 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.35 A

Short circuit peak current TJ = 25°C 2.2 A

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L78xx - L78xxC Electrical characteristics

Table 20. Electrical characteristics of L7815C (refer to the test circuits, TJ = 0 to 150 °C, VI = 23 V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100kHz, T

Output voltage TJ = 25°C 14.5 15 15.6 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 8 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA -1 mV/°C

= 17.5 to 30 V

= 17.5 to 30 V, TJ = 25°C 300

= 20 to 26 V, TJ = 25°C 150

= 5 mA to 1.5 A, TJ = 25°C 300

= 250 to 750 mA, TJ = 25°C 150

= 5 mA to 1A 0.5

= 17.5 to 30 V 1

= 25°C 90 µV/V

14.25 15 15.75 V

SVR Supply voltage rejection VI = 18.5 to 28.5 V, f = 120 Hz 54 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 V

Output resistance f = 1 kHz 19 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.23 A

Short circuit peak current TJ = 25°C 2.2 A

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Electrical characteristics L78xx - L78xxC

Table 21. Electrical characteristics of L7818C (refer to the test circuits, TJ = 0 to 150 °C, VI = 26 V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

ΔI

ΔV

eN Output noise voltage B = 10 Hz to 100 kHz, T

Output voltage TJ = 25°C 17.3 18 18.7 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 8 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA -1 mV/°C

= 21 to 33 V

= 21 to 33 V, TJ = 25°C 360

= 24 to 30 V, TJ = 25°C 180

= 5 mA to 1.5 A, TJ = 25°C 360

= 250 to 750 mA, TJ = 25°C 180

= 5 mA to 1 A 0.5

= 21 to 33 V 1

= 25°C 110 µV/V

17.1 18 18.9 V

SVR Supply voltage rejection VI = 22 to 32 V, f = 120 Hz 53 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 V

Output resistance f = 1 kHz 22 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.20 A

Short circuit peak current TJ = 25°C 2.1 A

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L78xx - L78xxC Electrical characteristics

Table 22. Electrical characteristics of L7820C (refer to the test circuits, TJ = 0 to 150 °C, VI = 28 V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

ΔI

ΔV

eN Output noise voltage B =10 Hz to 100 kHz, T

Output voltage TJ = 25°C 19.2 20 20.8 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 8 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA -1 mV/°C

= 23 to 35 V

= 22.5 to 35 V, TJ = 25°C 400

= 26 to 32 V, TJ = 25°C 200

= 5 mA to 1.5 A, TJ = 25°C 400

= 250 to 750 mA, TJ = 25°C 200

= 5 mA to 1 A 0.5

= 23 to 35 V 1

= 25°C 150 µV/V

19 20 21 V

SVR Supply voltage rejection VI = 24 to 35 V, f = 120 Hz 52 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 V

Output resistance f = 1 kHz 24 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.18 A

Short circuit peak current TJ = 25°C 2.1 A

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Electrical characteristics L78xx - L78xxC

Table 23. Electrical characteristics of L7824C (refer to the test circuits, TJ = 0 to 150 °C, VI = 33 V,

= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)

Symbol Parameter Test conditions Min. Typ. Max. Unit

ΔV

ΔI

ΔV

eN Output noise voltage B = 10 Hz to 100 kHz, T

Output voltage TJ = 25°C 23 24 25 V

= 5 mA to 1 A, PO ≤ 15 W

Output voltage

(1)

Line regulation

(1)

Load regulation

Quiescent current TJ = 25°C 8 mA

Quiescent current change

/ΔT Output voltage drift IO = 5 mA -1.5 mV/°C

= 27 to 38 V

= 27 to 38 V, TJ = 25°C 480

= 30 to 36 V, TJ = 25°C 240

= 5 mA to 1.5 A, TJ = 25°C 480

= 250 to 750 mA, TJ = 25°C 240

= 5 mA to 1 A 0.5

= 27 to 38 V 1

= 25°C 170 µV/V

22.8 24 25.2 V

SVR Supply voltage rejection VI = 28 to 38 V, f = 120 Hz 50 dB

1. 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 cycle is used.

Dropout voltage IO = 1 A, TJ = 25°C 2 V

Output resistance f = 1 kHz 28 mΩ

Short circuit current VI = 35 V, TJ = 25°C 0.15 A

Short circuit peak current TJ = 25°C 2.1 A

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L78xx - L78xxC Typical performance

6 Typical performance

Figure 8. Dropout voltage vs junction

temperature

Figure 10. Supply voltage rejection vs

frequency

Figure 9. Peak output current vs input/output

differential voltage

Figure 11. Output voltage vs junction

temperature

Figure 12. Output impedance vs frequency Figure 13. Quiescent current vs junction temp.

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Typical performance L78xx - L78xxC

Figure 14. Load transient response Figure 15. Line transient response

Figure 16. Quiescent current vs input voltage

Figure 17. Fixed output regulator

1. To specify an output voltage, substitute voltage value for "XX".

2. Although no output capacitor is need for stability, it does improve transient response.

3. Required if regulator is locate an appreciable distance from power supply filter.

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L78xx - L78xxC Typical performance

Figure 18. Current regulator

IO = VXX/R1+I

Figure 19. Circuit for increasing output voltage

IR1 ≥ 5 I

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

Figure 20. Adjustable output regulator (7 to 30 V)

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Typical performance L78xx - L78xxC

Figure 21. 0.5 to 10 V regulator

VO=VXXR4/R

Figure 22. High current voltage regulator

R1 = ______________

IO = I

REQ

REG

BEQ1

-(IQ1/βQ1)

+ Q1 (I

REG

BEQ1

______)

Figure 23. High output current with short circuit protection

RSC=V

BEQ2/ISC

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L78xx - L78xxC Typical performance

Figure 24. Tracking voltage regulator

Figure 25. Split power supply (± 15 V - 1 A)

* Against potential latch-up problems.

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Typical performance L78xx - L78xxC

Figure 26. Negative output voltage circuit

Figure 27. Switching regulator

Figure 28. High input voltage circuit

VIN = VI - (VZ + VBE)

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L78xx - L78xxC Typical performance

Figure 29. High input voltage circuit

Figure 30. High output voltage regulator

Figure 31. High input and output voltage

VO = VXX + V

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Typical performance L78xx - L78xxC

Figure 32. Reducing power dissipation with dropping resistor

I(min)-VXX-VDROP(max)

R = ____________________

O(max)+Id(max)

Figure 33. Remote shutdown

Figure 34. Power AM modulator (unity voltage gain, IO ≤ 0.5)

Note: The circuit performs well up to 100 kHz.

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L78xx - L78xxC Typical performance

Figure 35. Adjustable output voltage with temperature compensation

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

Note: Q2 is connected as a diode in order to compensate the variation of the Q1 VBE with the

temperature. C allows a slow rise time of the V

Figure 36. Light controllers (V

= VXX + VBE)

Omin

falls when the light goes up

VO rises when the light goes up

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Typical performance L78xx - L78xxC

Figure 37. Protection against input short-circuit with high capacitance loads

1. Application with high capacitance loads and an output voltage greater than 6 volts need an external diode (see Figure 32 on page 36) to protect the device against input short circuit. In this case the input voltage falls rapidly while the output voltage decrease slowly. The capacitance discharges by means of the BaseEmitter junction of the series pass transistor in the regulator. If the energy is sufficiently high, the transistor may be destroyed. The external diode by-passes the current from the IC to ground.

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L78xx - L78xxC Package mechanical data

7 Package mechanical data

In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.

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Package mechanical data L78xx - L78xxC

Figure 38. Drawing dimension TO-220 (type SMIC-subcon.)

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0015988/F

L78xx - L78xxC Package mechanical data

Figure 39. Drawing dimension TO-220 (type STD-ST)

0015988/A

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Package mechanical data L78xx - L78xxC

Table 24. TO-220 mechanical data

Type STD-ST Type SMIC-Subcon.

Dim.

Min. Typ. Max. Min. Typ. Max.

A 4.40 4.60 4.47 4.57 4.67

A1 0.61 0.88 0.80 0.81 0.86

b1 1.14 1.70 1.15 1.44

c 0.49 0.70 0.56

c1 0.38

D 15.25 15.75 15.07 15.24 15.45

D1 1.27

E 10.00 10.40 10 10.15 10.30

e 2.40 2.70 2.29 2.54 2.79

e1 4.95 5.15 4.83 5.08 5.33

F 1.23 1.32 1.27

H1 6.20 6.60 6.24

J1 2.40 2.72 2.04 2.67 2.92

L 13.00 14.00 13.35 13.50 13.65

L1 3.50 3.93 3.90

mm. mm.

L20 16.40 16.25 16.40 16.55

L30 28.90 28.74

∅P 3.75 3.85 3.83

Q 2.65 2.95 2.72 2.74 2.80

Note: In spite of some difference in tolerances, the packages are compatible.

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L78xx - L78xxC Package mechanical data

Figure 40. Drawing dimension TO-220FP

7012510A-H

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Package mechanical data L78xx - L78xxC

Table 25. TO-220FP mechanical data

mm. inch.

Dim.

Min. Typ. Max. Min. Typ. Max.

A 4.40 4.60 0.173 0.181

B 2.5 2.7 0.098 0.106

D 2.5 2.75 0.098 0.108

E 0.45 0.70 0.017 0.027

F 0.75 1 0.030 0.039

F1 1.15 1.50 0.045 0.059

F2 1.15 1.50 0.045 0.059

G 4.95 5.2 0.194 0.204

G1 2.4 2.7 0.094 0.106

H 10.0 10.40 0.393 0.409

L2 16 0.630

L3 28.6 30.6 1.126 1.204

L4 9.8 10.6 0.385 0.417

L5 2.9 3.6 0.114 0.142

L6 15.9 16.4 0.626 0.645

L7 9 9.3 0.354 0.366

DIA. 3 3.2 0.118 0.126

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L78xx - L78xxC Package mechanical data

Figure 41. Drawing dimension TO-3

Table 26. TO-3 mechanical data

mm. inch.

Dim.

Min. Typ. Max. Min. Typ. Max.

A 11.85 0.466

B 0.96 1.05 1.10 0.037 0.041 0.043

C 1.70 0.066

D 8.7 0.342

E 20.0 0.787

G 10.9 0.429

N 16.9 0.665

P 26.2 1.031

R 3.88 4.09 0.152 0.161

U 39.5 1.555

V 30.10 1.185

P003C/C

45/56

Package mechanical data L78xx - L78xxC

Figure 42. Drawing dimension DPAK

46/56

0068772-F

L78xx - L78xxC Package mechanical data

Table 27. DPAK mechanical data

mm. inch.

Dim.

Min. Typ. Max. Min. Typ. Max.

A 2.2 2.4 0.086 0.094

A1 0.9 1.1 0.035 0.043

A2 0.03 0.23 0.001 0.009

B 0.64 0.9 0.025 0.035

b4 5.2 5.4 0.204 0.212

C 0.45 0.6 0.017 0.023

C2 0.48 0.6 0.019 0.023

D 6 6.2 0.236 0.244

D1 5.1 0.200

E 6.4 6.6 0.252 0.260

E1 4.7 0.185

e2.28 0.090

e1 4.4 4.6 0.173 0.181

H 9.35 10.1 0.368 0.397

L 1 0.039

(L1) 2.8 0.110

L2 0.8 0.031

L4 0.6 1 0.023 0.039

R0.2 0.008

V2 0° 8° 0° 8°

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Package mechanical data L78xx - L78xxC

Figure 43. Drawing dimension tape and reel for DPAK

Table 28. Tape and reel DPAK mechanical data

mm. inch.

Dim.

Min. Typ. Max. Min. Typ. Max.

A 330 12.992

C 12.8 13.0 13.2 0.504 0.512 0.519

D 20.2 0.795

N 60 2.362

T 22.4 0.882

Ao 6.80 6.90 7.00 0.268 0.272 0.2.76

Bo 10.40 10.50 10.60 0.409 0.413 0.417

Ko 2.55 2.65 2.75 0.100 0.104 0.105

Po 3.9 4.0 4.1 0.153 0.157 0.161

P 7.9 8.0 8.1 0.311 0.315 0.319

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L78xx - L78xxC Package mechanical data

Figure 44. Drawing dimension D²PAK (type STD-ST)

0079457/L

49/56

Package mechanical data L78xx - L78xxC

Figure 45. Drawing dimension D²PAK (type WOOSEOK-Subcon.)

50/56

0079457/L

L78xx - L78xxC Package mechanical data

Table 29. D

Dim.

A 4.40 4.60 4.30 4.70

A1 0.03 0.23 0 0.20

b 0.70 0.93 0.70 0.90

b2 1.14 1.70 1.17 1.37

c 0.45 0.60 0.45 0.50 0.60

c2 1.23 1.36 1.25 1.30 1.40

D 8.95 9.35 9 9.20 9.40

D1 7.50 7.50

E 10 10.40 9.80 10.20

E1 8.50 7.50

e2.54 2.54

e1 4.88 5.28 5.08

H 15 15.85 15 15.30 15.60

J1 2.49 2.69 2.20 2.60

L 2.29 2.79 1.79 2.79

PAK mechanical data

TYPE STD-ST TYPE WOOSEOK-Subcon.

mm. mm.

Min. Typ. Max. Min. Typ. Max.

L1 1.27 1.40 1 1.40

L2 1.30 1.75 1.20 1.60

R 0.4 0.30

V2 0° 8° 0° 3°

Note: The D²PAK package coming from the subcontractor Wooseok is fully compatible with the

ST's package suggested footprint.

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Package mechanical data L78xx - L78xxC

Figure 46. D²PAK footprint recommended data

Table 30. D²PAK footprint data

Dim. mm. inch.

A 12.20 0.480

B9.750.384

C 16.90 0.665

D3.500.138

E1.600.063

F2.540.100

G5.080.200

Values

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L78xx - L78xxC Package mechanical data

Table 31. Tape and reel D²PAK mechanical data

mm. inch.

Dim.

Min. Typ. Max. Min. Typ. Max.

A 180 7.086

C 12.8 13.0 13.2 0.504 0.512 0.519

D 20.2 0.795

N 60 2.362

T 14.4 0.567

Ao 10.50 10.6 10.70 0.413 0.417 0.421

Bo 15.70 15.80 15.90 0.618 0.622 0.626

Ko 4.80 4.90 5.00 0.189 0.193 0.197

Po 3.9 4.0 4.1 0.153 0.157 0.161

P 11.9 12.0 12.1 0.468 0.472 0.476

Figure 47. Drawing dimension tape and reel for D²PAK

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Order codes L78xx - L78xxC

8 Order codes

Table 32. Order codes

Order codes

Part numbers

TO-220 DPAK D

L7805 L7805T

L7805C L7805CV L7805CDT-TR L7805CD2T-TR L7805CP L7805CT

L7806C L7806CV L7806CD2T-TR L7806CT

L7808C L7808CV L7808CD2T-TR L7808CP

L7885C L7885CV L7885CD2T-TR

L7809C L7809CV L7809CD2T-TR L7809CP

L7812C L7812CV L7812CD2T-TR L7812CP L7812CT

L7815C L7815CV L7815CD2T-TR L7815CP L7815CT

L7818C L7818CV L7818CD2T-TR

L7824C L7824CV L7824CD2T-TR L7824CP L7824CT

1. Available on request.

PAK TO-220FP TO-3

(1)

L7885CP

(1)

L7885CT

L7818CT

(1)

54/56

L78xx - L78xxC Revision history

9 Revision history

Table 33. Document revision history

Date Revision Changes

21-Jun-2004 12 Document updating.

03-Aug-2006 13 Order codes has been updated and new template.

19-Jan-2007 14 D

31-May-2007 15 Order codes has been updated.

29-Aug-2007 16 Added Ta b l e 1 in cover page.

11-Dec-2007 17 Modified: Ta b le 3 2 .

PAK mechanical data has been updated and add footprint data.

06-Feb-2008 18

18-Mar-2008 19

Added: TO-220 mechanical data Figure 38 on page 40, Figure 39 on page 41 and Table 24 on page 42. Modified: Table 32 on page 54.

Added: Table 27: DPAK mechanical data on page 47., Table 28: Tape and reel

DPAK mechanical data on page 48. Modified: Table 32 on page 54.

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L78xx - L78xxC

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56/56

ST MICROELECTRONICS L7812CP STM Datasheet

Specifications and Main Features

Frequently Asked Questions

User Manual

Table 1. Device summary

1 Diagram

Figure 1. Block diagram

2 Pin configuration

Figure 2. Pin connections (top view)

Figure 3. Schematic diagram

3 Maximum ratings

Table 2. Absolute maximum ratings

Table 3. Thermal data

Figure 4. Application circuits

4 Test circuits

Figure 5. DC parameter

Figure 6. Load regulation

Figure 7. Ripple rejection

5 Electrical characteristics

6 Typical performance

Figure 12. Output impedance vs frequency Figure 13. Quiescent current vs junction temp.

Figure 14. Load transient response Figure 15. Line transient response

Figure 16. Quiescent current vs input voltage

Figure 17. Fixed output regulator

Figure 18. Current regulator

Figure 19. Circuit for increasing output voltage

Figure 20. Adjustable output regulator (7 to 30 V)

Figure 21. 0.5 to 10 V regulator

Figure 22. High current voltage regulator

Figure 23. High output current with short circuit protection

Figure 24. Tracking voltage regulator

Figure 25. Split power supply (± 15 V - 1 A)

Figure 26. Negative output voltage circuit

Figure 27. Switching regulator

Figure 28. High input voltage circuit

Figure 29. High input voltage circuit

Figure 30. High output voltage regulator

Figure 31. High input and output voltage

Figure 32. Reducing power dissipation with dropping resistor

Figure 33. Remote shutdown

Figure 35. Adjustable output voltage with temperature compensation

Figure 37. Protection against input short-circuit with high capacitance loads

7 Package mechanical data

Figure 38. Drawing dimension TO-220 (type SMIC-subcon.)

Figure 39. Drawing dimension TO-220 (type STD-ST)

Table 24. TO-220 mechanical data

Figure 40. Drawing dimension TO-220FP

Table 25. TO-220FP mechanical data

Figure 41. Drawing dimension TO-3

Table 26. TO-3 mechanical data

Figure 42. Drawing dimension DPAK

Table 27. DPAK mechanical data

Figure 43. Drawing dimension tape and reel for DPAK

Table 28. Tape and reel DPAK mechanical data

8 Order codes

Table 32. Order codes

9 Revision history

Table 33. Document revision history