L78xx

L78xxC

Positive voltage regulators

Features
■ Output current to 1.5 A
■ Output voltages of 5; 5.2; 6; 8; 8.5; 9; 10; 12;
15; 18; 20; 24 V
■ Thermal overload protection
■ Short circuit protection
■ Output transition SOA protection TO-220 TO-220FP

Description
The L78xx series of three-terminal positive
regulators is available in TO-220, TO-220FP,
TO-3 and D2PAK packages and several fixed
output voltages, making it useful in a wide range
of applications. These regulators can provide D2PAK TO-3
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.

Table 1. Device summary

Order codes

L7805 L7810C
L7805C L7812C
L7852C L7815C
L7806C L7818C
L7808C L7820C
L7885C L7824C
L7809C

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 L78xx - L78xxC

Contents

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

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

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

4 Test circuits ............................................... 9

5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

6 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

8 Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

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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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5. DC Parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 6. Load regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 7. Ripple rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 8. Dropout voltage vs junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 9. Peak output current vs input/output differential voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 10. Supply voltage rejection vs frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 11. Output voltage vs junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 12. Output impedance vs frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 13. Quiescent current vs junction temp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 14. Load transient response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 15. Line transient response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 16. Quiescent current vs input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 17. Fixed output regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 18. Current regulator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 19. Circuit for increasing output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 20. Adjustable output regulator (7 to 30 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 21. 0.5 to 10 V Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 22. High current voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 23. High output current with short circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 24. Tracking voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 25. Split power supply (± 15 V - 1 A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 26. Negative output voltage circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 27. Switching regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 28. High input voltage circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 29. High input voltage circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 30. High output voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 31. High input and output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 32. Reducing power dissipation with dropping resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 33. Remote shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 34. Power AM modulator (unity voltage gain, IO ≤0.5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 35. Adjustable output voltage with temperature compensation . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 36. Light controllers (VOmin = VXX + VBE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 37. Protection against input short-circuit with high capacitance loads . . . . . . . . . . . . . . . . . . . 40
Figure 38. Drawing dimension D2PAK (type STD-ST). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 39. Drawing dimension D2PAK (type WOOSEOK-SUBCON.) . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 40. D2PAK footprint recommended data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

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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 (refer to the test circuits, TJ = -55 to 150°C,
VI = 10 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . 11
Table 5. Electrical characteristics of L7806 (refer to the test circuits, TJ = -55 to 150°C,
VI = 11 V,IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . . 12
Table 6. Electrical characteristics of L7808 (refer to the test circuits, TJ = -55 to 150°C,
VI = 14V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . . 13
Table 7. Electrical characteristics of L7812 (refer to the test circuits, TJ = -55 to 150°C,
VI = 19 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . 14
Table 8. Electrical characteristics of L7815 (refer to the test circuits, TJ = -55 to 150°C,
VI = 23 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . 15
Table 9. Electrical characteristics of L7818 (refer to the test circuits, TJ = -55 to 150°C,
VI = 26 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . 16
Table 10. Electrical characteristics of L7820 (refer to the test circuits, TJ = -55 to 150°C,
VI = 28 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . 17
Table 11. Electrical characteristics of L7824 (refer to the test circuits, TJ = -55 to 150°C,
VI = 33 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . 18
Table 12. Electrical characteristics of L7805C (refer to the test circuits, TJ = 0 to 150°C,
VI = 10 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . 19
Table 13. Electrical characteristics of L7852C (refer to the test circuits, TJ = 0 to 150°C,
VI = 10 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . 20
Table 14. Electrical characteristics of L7806C (refer to the test circuits, TJ = 0 to 150°C,
VI = 11 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . 21
Table 15. Electrical characteristics of L7808C (refer to the test circuits, TJ = 0 to 150°C,
VI = 14 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . 22
Table 16. Electrical characteristics of L7885C (refer to the test circuits, TJ = 0 to 150°C,
VI = 14.5 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . 23
Table 17. Electrical characteristics of L7809C (refer to the test circuits, TJ = 0 to 150°C,
VI = 15 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . 24
Table 18. Electrical characteristics of L7810C (refer to the test circuits, TJ = 0 to 150°C,
VI = 15 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . 25
Table 19. Electrical characteristics of L7812C (refer to the test circuits, TJ = 0 to 150°C,
VI = 19 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . 26
Table 20. Electrical characteristics of L7815C (refer to the test circuits, TJ = 0 to 150°C,
VI = 23 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . 27
Table 21. Electrical characteristics of L7818C (refer to the test circuits, TJ = 0 to 150°C,
VI = 26 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . 28
Table 22. Electrical characteristics of L7820C (refer to the test circuits, TJ = 0 to 150°C,
VI = 28 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . 29
Table 23. Electrical characteristics of L7824C (refer to the test circuits, TJ = 0 to 150°C,
VI = 33 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified) . . . . . . . . 30
Table 24. D2PAK mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table 25. Footprint data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 26. Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Table 27. Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

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L78xx - L78xxC Diagram

1 Diagram

Figure 1. Block diagram

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Pin configuration L78xx - L78xxC

2 Pin configuration

Figure 2. Pin connections (top view)

TO-220 TO220FP

D2PAK (Any Type)

TO-3

Figure 3. Schematic diagram

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L78xx - L78xxC Maximum ratings

3 Maximum ratings

Table 2. Absolute maximum ratings

Symbol Parameter Value Unit

for VO= 5 to 18 V 35
VI DC Input voltage V
for VO= 20, 24 V 40
IO Output current Internally Limited
PD Power dissipation Internally Limited
TSTG Storage temperature range -65 to 150 °C
for L7800 -55 to 150
TOP Operating junction temperature range °C
for L7800C 0 to 150

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 TO-220 TO-220FP TO-3 Unit

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

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

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Maximum ratings L78xx - L78xxC

Figure 4. Application circuits

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L78xx - L78xxC Test circuits

4 Test circuits

Figure 5. DC Parameter

Figure 6. Load regulation

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Test circuits L78xx - L78xxC

Figure 7. Ripple rejection

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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,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 4.8 5 5.2 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 4.65 5 5.35 V
VI = 8 to 20 V
VI = 7 to 25 V, TJ = 25°C 3 50
ΔVO(1) Line regulation mV
VI = 8 to 12 V, TJ = 25°C 1 25
IO = 5 mA to 1.5 A, TJ = 25°C 100
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 25
Id Quiescent current TJ = 25°C 6 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 8 to 25 V 0.8
ΔVO/ΔT Output voltage drift IO = 5 mA 0.6 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 40 µV/VO
SVR Supply voltage rejection VI = 8 to 18 V, f = 120 Hz 68 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 2.5 V
RO Output resistance f = 1 KHz 17 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.75 1.2 A
Iscp Short circuit peak current TJ = 25°C 1.3 2.2 3.3 A
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.

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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,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 5.75 6 6.25 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 5.65 6 6.35 V
VI = 9 to 21 V
VI = 8 to 25 V, TJ = 25°C 60
ΔVO(1) Line regulation mV
VI = 9 to 13 V, TJ = 25°C 30
IO = 5 mA to 1.5 A, TJ = 25°C 100
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 30
Id Quiescent current TJ = 25°C 6 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 9 to 25 V 0.8
ΔVO/ΔT Output voltage drift IO = 5 mA 0.7 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 40 µV/VO
SVR Supply voltage rejection VI = 9 to 19 V, f = 120 Hz 65 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 2.5 V
RO Output resistance f = 1 KHz 19 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.75 1.2 A
Iscp Short circuit peak current TJ = 25°C 1.3 2.2 3.3 A
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.

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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, IO
= 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 7.7 8 8.3 V

IO = 5 mA to 1A, PO ≤15 W
VO Output voltage 7.6 8 8.4 V
VI = 11.5 to 23 V
VI = 10.5 to 25 V, TJ = 25°C 80
ΔVO(1) Line regulation mV
VI = 11 to 17 V, TJ = 25°C 40
IO = 5 mA to 1.5 A, TJ = 25°C 100
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 40
Id Quiescent current TJ = 25°C 6 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 11.5 to 25 V 0.8
ΔVO/ΔT Output voltage drift IO = 5 mA 1 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 40 µV/VO
SVR Supply voltage rejection VI = 11.5 to 21.5 V, f = 120 Hz 62 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 2.5 V
RO Output resistance f = 1 KHz 16 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.75 1.2 A
Iscp Short circuit peak current TJ = 25°C 1.3 2.2 3.3 A
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.

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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,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 11.5 12 12.5 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 11.4 12 12.6 V
VI = 15.5 to 27 V
VI = 14.5 to 30 V, TJ = 25°C 120
ΔVO(1) Line regulation mV
VI = 16 to 22 V, TJ = 25°C 60
IO = 5 mA to 1.5 A, TJ = 25°C 100
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 60
Id Quiescent current TJ = 25°C 6 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 15 to 30 V 0.8
ΔVO/ΔT Output voltage drift IO = 5 mA 1.5 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 40 µV/VO
SVR Supply voltage rejection VI = 15 to 25 V, f = 120 Hz 61 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 2.5 V
RO Output resistance f = 1 KHz 18 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.75 1.2 A
Iscp Short circuit peak current TJ = 25°C 1.3 2.2 3.3 A
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.

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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,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 14.4 15 15.6 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 14.25 15 15.75 V
VI = 18.5 to 30 V
VI = 17.5 to 30 V, TJ = 25°C 150
ΔVO(1) Line regulation mV
VI = 20 to 26 V, TJ = 25°C 75
IO = 5 mA to 1.5 A, TJ = 25°C 150
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 75
Id Quiescent current TJ = 25°C 6 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 18.5 to 30 V 0.8
ΔVO/ΔT Output voltage drift IO = 5 mA 1.8 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 40 µV/VO
SVR Supply voltage rejection VI = 18.5 to 28.5 V, f = 120 Hz 60 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 2.5 V
RO Output resistance f = 1 KHz 19 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.75 1.2 A
Iscp Short circuit peak current TJ = 25°C 1.3 2.2 3.3 A
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.

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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,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 17.3 18 18.7 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 17.1 18 18.9 V
VI = 22 to 33 V
VI = 21 to 33 V, TJ = 25°C 180
ΔVO(1) Line regulation mV
VI = 24 to 30 V, TJ = 25°C 90
IO = 5 mA to 1.5 A, TJ = 25°C 180
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 90
Id Quiescent current TJ = 25°C 6 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 22 to 33 V 0.8
ΔVO/ΔT Output voltage drift IO = 5 mA 2.3 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 40 µV/VO
SVR Supply voltage rejection VI = 22 to 32 V, f = 120 Hz 59 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 2.5 V
RO Output resistance f = 1 KHz 22 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.75 1.2 A
Iscp Short circuit peak current TJ = 25°C 1.3 2.2 3.3 A
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.

16/52
L78xx - L78xxC Electrical characteristics

Table 10. Electrical characteristics of L7820 (refer to the test circuits, TJ = -55 to 150°C, VI = 28 V,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 19.2 20 20.8 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 19 20 21 V
VI = 24 to 35 V
VI = 22.5 to 35 V, TJ = 25°C 200
ΔVO(1) Line regulation mV
VI = 26 to 32 V, TJ = 25°C 100
IO = 5 mA to 1.5 A, TJ = 25°C 200
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 100
Id Quiescent current TJ = 25°C 6 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 24 to 35 V 0.8
ΔVO/ΔT Output voltage drift IO = 5 mA 2.5 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 40 µV/VO
SVR Supply voltage rejection VI = 24 to 35 V, f = 120 Hz 58 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 2.5 V
RO Output resistance f = 1 KHz 24 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.75 1.2 A
Iscp Short circuit peak current TJ = 25°C 1.3 2.2 3.3 A
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.

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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,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 23 24 25 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 22.8 24 25.2 V
VI = 28 to 38 V
VI = 27 to 38 V, TJ = 25°C 240
ΔVO(1) Line regulation mV
VI = 30 to 36 V, TJ = 25°C 120
IO = 5 mA to 1.5 A, TJ = 25°C 240
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 120
Id Quiescent current TJ = 25°C 6 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 28 to 38 V 0.8
ΔVO/ΔT Output voltage drift IO = 5 mA 3 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 40 µV/VO
SVR Supply voltage rejection VI = 28 to 38 V, f = 120 Hz 56 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 2.5 V
RO Output resistance f = 1 KHz 28 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.75 1.2 A
Iscp Short circuit peak current TJ = 25°C 1.3 2.2 3.3 A
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.

18/52
L78xx - L78xxC Electrical characteristics

Table 12. Electrical characteristics of L7805C (refer to the test circuits, TJ = 0 to 150°C, VI = 10 V,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 4.8 5 5.2 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 4.75 5 5.25 V
VI = 7 to 20 V
VI = 7 to 25 V, TJ = 25°C 3 100
ΔVO(1) Line regulation mV
VI = 8 to 12 V, TJ = 25°C 1 50
IO = 5 mA to 1.5 A, TJ = 25°C 100
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 50
Id Quiescent current TJ = 25°C 8 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 7 to 25 V 0.8
ΔVO/ΔT Output voltage drift IO = 5 mA -1.1 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 40 µV/VO
SVR Supply voltage rejection VI = 8 to 18 V, f = 120 Hz 62 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 V
RO Output resistance f = 1 KHz 17 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.75 A
Iscp Short circuit peak current TJ = 25°C 2.2 A
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.

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Electrical characteristics L78xx - L78xxC

Table 13. Electrical characteristics of L7852C (refer to the test circuits, TJ = 0 to 150°C, VI = 10 V,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 5.0 5.2 5.4 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 4.95 5.2 5.45 V
VI = 8 to 20 V
VI = 7 to 25 V, TJ = 25°C 3 105
ΔVO(1) Line regulation mV
VI = 8 to 12 V, TJ = 25°C 1 52
IO = 5 mA to 1.5 A, TJ = 25°C 105
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 52
Id Quiescent current TJ = 25°C 8 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 7 to 25 V 1.3
ΔVO/ΔT Output voltage drift IO = 5 mA -1 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 42 µV/VO
SVR Supply voltage rejection VI = 8 to 18 V, f = 120 Hz 61 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 V
RO Output resistance f = 1 KHz 17 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.75 A
Iscp Short circuit peak current TJ = 25°C 2.2 A
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.

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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,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 5.75 6 6.25 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 5.7 6 6.3 V
VI = 8 to 21 V
VI = 8 to 25 V, TJ = 25°C 120
ΔVO(1) Line regulation mV
VI = 9 to 13 V, TJ = 25°C 60
IO = 5 mA to 1.5 A, TJ = 25°C 120
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 60
Id Quiescent current TJ = 25°C 8 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 8 to 25 V 1.3
ΔVO/ΔT Output voltage drift IO = 5 mA -0.8 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 45 µV/VO
SVR Supply voltage rejection VI = 9 to 19 V, f = 120 Hz 59 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 V
RO Output resistance f = 1 KHz 19 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.55 A
Iscp Short circuit peak current TJ = 25°C 2.2 A
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.

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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,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 7.7 8 8.3 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 7.6 8 8.4 V
VI = 10.5 to 25 V
VI = 10.5 to 25 V, TJ = 25°C 160
ΔVO(1) Line regulation mV
VI = 11 to 17 V, TJ = 25°C 80
IO = 5 mA to 1.5 A, TJ = 25°C 160
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 80
Id Quiescent current TJ = 25°C 8 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 10.5 to 25 V 1
ΔVO/ΔT Output voltage drift IO = 5 mA -0.8 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 52 µV/VO
SVR Supply voltage rejection VI = 11.5 to 21.5 V, f = 120 Hz 56 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 V
RO Output resistance f = 1 KHz 16 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.45 A
Iscp Short circuit peak current TJ = 25°C 2.2 A
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.

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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,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 8.2 8.5 8.8 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 8.1 8.5 8.9 V
VI = 11 to 26 V
VI = 11 to 27 V, TJ = 25°C 160
ΔVO(1) Line regulation mV
VI = 11.5 to 17.5 V, TJ = 25°C 80
IO = 5 mA to 1.5 A, TJ = 25°C 160
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 80
Id Quiescent current TJ = 25°C 8 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 11 to 27 V 1
ΔVO/ΔT Output voltage drift IO = 5 mA -0.8 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 55 µV/VO
SVR Supply voltage rejection VI = 12 to 22V, f = 120Hz 56 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 V
RO Output resistance f = 1 KHz 16 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.45 A
Iscp Short circuit peak current TJ = 25°C 2.2 A
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.

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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,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 8.64 9 9.36 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 8.55 9 9.45 V
VI = 11.5 to 26 V
VI = 11.5 to 26 V, TJ = 25°C 180
ΔVO(1) Line regulation mV
VI = 12 to 18 V, TJ = 25°C 90
IO = 5 mA to 1.5 A, TJ = 25°C 180
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 90
Id Quiescent current TJ = 25°C 8 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 11.5 to 26 V 1
ΔVO/ΔT Output voltage drift IO = 5 mA -1 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 70 µV/VO
SVR Supply voltage rejection VI = 12 to 23 V, f = 120 Hz 55 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 V
RO Output resistance f = 1 KHz 17 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.40 A
Iscp Short circuit peak current TJ = 25°C 2.2 A
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.

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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,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 9.6 10 10.4 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 9.5 10 10.5 V
VI = 12.5 to 26 V
VI = 12.5 to 26 V, TJ = 25°C 200
ΔVO(1) Line regulation mV
VI = 13.5 to 19 V, TJ = 25°C 100
IO = 5 mA to 1.5 A, TJ = 25°C 200
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 100
Id Quiescent current TJ = 25°C 8 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 12.5 to 26 V 1
ΔVO/ΔT Output voltage drift IO = 5 mA -1 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 70 µV/VO
SVR Supply voltage rejection VI = 13 to 23 V, f = 120 Hz 55 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 V
RO Output resistance f = 1 KHz 17 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.40 A
Iscp Short circuit peak current TJ = 25°C 2.2 A
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.

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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,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 11.5 12 12.5 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 11.4 12 12.6 V
VI = 14.5 to 27 V
VI = 14.5 to 30 V, TJ = 25°C 240
ΔVO(1) Line regulation mV
VI = 16 to 22 V, TJ = 25°C 120
IO = 5 mA to 1.5 A, TJ = 25°C 240
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 120
Id Quiescent current TJ = 25°C 8 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 14.5 to 30 V 1
ΔVO/ΔT Output voltage drift IO = 5 mA -1 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 75 µV/VO
SVR Supply voltage rejection VI = 15 to 25 V, f = 120 Hz 55 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 V
RO Output resistance f = 1 KHz 18 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.35 A
Iscp Short circuit peak current TJ = 25°C 2.2 A
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.

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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,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 14.5 15 15.6 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 14.25 15 15.75 V
VI = 17.5 to 30 V
VI = 17.5 to 30 V, TJ = 25°C 300
ΔVO(1) Line regulation mV
VI = 20 to 26 V, TJ = 25°C 150
IO = 5 mA to 1.5 A, TJ = 25°C 300
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 150
Id Quiescent current TJ = 25°C 8 mA
IO = 5 mA to 1A 0.5
ΔId Quiescent current change mA
VI = 17.5 to 30 V 1
ΔVO/ΔT Output voltage drift IO = 5 mA -1 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 90 µV/VO
SVR Supply voltage rejection VI = 18.5 to 28.5 V, f = 120 Hz 54 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 V
RO Output resistance f = 1 KHz 19 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.23 A
Iscp Short circuit peak current TJ = 25°C 2.2 A
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.

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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,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 17.3 18 18.7 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 17.1 18 18.9 V
VI = 21 to 33 V
VI = 21 to 33 V, TJ = 25°C 360
ΔVO(1) Line regulation mV
VI = 24 to 30 V, TJ = 25°C 180
IO = 5 mA to 1.5 A, TJ = 25°C 360
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 180
Id Quiescent current TJ = 25°C 8 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 21 to 33 V 1
ΔVO/ΔT Output voltage drift IO = 5 mA -1 mV/°C
eN Output noise voltage B = 10 Hz to 100 KHz, TJ = 25°C 110 µV/VO
SVR Supply voltage rejection VI = 22 to 32 V, f = 120 Hz 53 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 V
RO Output resistance f = 1 KHz 22 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.20 A
Iscp Short circuit peak current TJ = 25°C 2.1 A
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.

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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,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 19.2 20 20.8 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 19 20 21 V
VI = 23 to 35 V
VI = 22.5 to 35 V, TJ = 25°C 400
ΔVO(1) Line regulation mV
VI = 26 to 32 V, TJ = 25°C 200
IO = 5 mA to 1.5 A, TJ = 25°C 400
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 200
Id Quiescent current TJ = 25°C 8 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 23 to 35 V 1
ΔVO/ΔT Output voltage drift IO = 5 mA -1 mV/°C
eN Output noise voltage B =10 Hz to 100 KHz, TJ = 25°C 150 µV/VO
SVR Supply voltage rejection VI = 24 to 35 V, f = 120 Hz 52 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 V
RO Output resistance f = 1 KHz 24 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.18 A
Iscp Short circuit peak current TJ = 25°C 2.1 A
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.

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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,
IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit

VO Output voltage TJ = 25°C 23 24 25 V

IO = 5 mA to 1 A, PO ≤15 W
VO Output voltage 22.8 24 25.2 V
VI = 27 to 38 V
VI = 27 to 38 V, TJ = 25°C 480
ΔVO(1) Line regulation mV
VI = 30 to 36 V, TJ = 25°C 240
IO = 5 mA to 1.5 A, TJ = 25°C 480
ΔVO(1) Load regulation mV
IO = 250 to 750 mA, TJ = 25°C 240
Id Quiescent current TJ = 25°C 8 mA
IO = 5 mA to 1 A 0.5
ΔId Quiescent current change mA
VI = 27 to 38 V 1
ΔVO/ΔT Output voltage drift IO = 5 mA -1.5 mV/°C
eN Output noise voltage B = 10 Hz to 100 KHz, TJ = 25°C 170 µV/VO
SVR Supply voltage rejection VI = 28 to 38 V, f = 120 Hz 50 dB
Vd Dropout voltage IO = 1 A, TJ = 25°C 2 V
RO Output resistance f = 1 KHz 28 mΩ
Isc Short circuit current VI = 35 V, TJ = 25°C 0.15 A
Iscp Short circuit peak current TJ = 25°C 2.1 A
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.

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L78xx - L78xxC Typical performance

6 Typical performance

Figure 8. Dropout voltage vs junction Figure 9. Peak output current vs input/output

temperature differential voltage

Figure 10. Supply voltage rejection vs Figure 11. Output voltage vs junction
frequency 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+Id

Figure 19. Circuit for increasing output voltage

IR1 ≥ 5 Id

VO = VXX(1+R2/R1)+IdR2

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

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Typical performance L78xx - L78xxC

Figure 21. 0.5 to 10V Regulator

VO=VXXR4/R1

Figure 22. High current voltage regulator

VBEQ1
R1 = ______________
IREQ-(IQ1/βQ1)

VBEQ1
IO = IREG + Q1 (IREG ______)
R1

Figure 23. High output current with short circuit protection

RSC=VBEQ2/ISC

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L78xx - L78xxC Typical performance

Figure 24. Tracking voltage regulator

Figure 25. Split power supply (± 15V - 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 + VZ1

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Typical performance L78xx - L78xxC

Figure 32. Reducing power dissipation with dropping resistor

VI(min)-VXX-VDROP(max)
R = ____________________
IO(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) + VBE

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 VO.

Figure 36. Light controllers (VOmin = VXX + VBE)

VO 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 fig. 32) 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 Base-Emitter 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

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

A D
P

G C

E
U

B
O
N

P003C/C

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L78xx - L78xxC Package mechanical data

TO-220 (A type) mechanical data

mm. inch.
Dim.
Min. Typ. Max. Min. Typ. Max.
A 4.40 4.60 0.173 0.181
b 0.61 0.88 0.024 0.035
b1 1.15 1.70 0.045 0.067
c 0.49 0.70 0.019 0.028
D 15.25 15.75 0.600 0.620
E 10.0 10.40 0.394 0.409
e 2.4 2.7 0.094 0.106
e1 4.95 5.15 0.195 0.203
F 1.23 1.32 0.048 0.052
H1 6.2 6.6 0.244 0.260
J1 2.40 2.72 0.094 0.107
L 13.0 14.0 0.512 0.551
L1 3.5 3.93 0.138 0.155
L20 16.4 0.646
L30 28.9 1.138
φP 3.75 3.85 0.148 0.152
Q 2.65 2.95 0.104 0.116

0015988/N

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Package mechanical data L78xx - L78xxC

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

7012510A-H

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L78xx - L78xxC Package mechanical data

Figure 38. Drawing dimension D2PAK (type STD-ST)

0079457/L

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Package mechanical data L78xx - L78xxC

Figure 39. Drawing dimension D2PAK (type WOOSEOK-SUBCON.)

0079457/L

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L78xx - L78xxC Package mechanical data

Table 24. D2PAK mechanical data

TYPE STD-ST TYPE WOOSEOK-SUBCON.

DIM. mm. mm.

MIN. TYP. MAX. MIN. TYP. MAX.

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
e 2.54 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
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 40. D2PAK footprint recommended data

Table 25. Footprint data

VALUES

mm. inch.

A 12.20 0.480
B 9.75 0.384
C 16.90 0.665
D 3.50 0.138
E 1.60 0.063
F 2.54 0.100
G 5.08 0.200

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L78xx - L78xxC Package mechanical data

Tape & reel D2PAK-P2PAK-D2PAK/A-P2PAK/A 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

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Order code L78xx - L78xxC

8 Order code

Table 26. Order code

Packaging
Part numbers
TO-220
D2PAK TO-220FP TO-3
(A Type)

L7805 L7805T
L7805C L7805CV L7805CD2T-TR L7805CP L7805CT
L7852C L7852CV L7852CD2T-TR(1) L7852CP(1) L7852CT(1)
L7806C L7806CV L7806CD2T-TR L7806CT
L7808C L7808CV L7808CD2T-TR L7808CP L7808CT
(1) (1)
L7885C L7885CV L7885CD2T-TR L7885CP L7885CT(1)
L7809C L7809CV L7809CD2T-TR L7809CP L7809CT
(1)
L7810C L7810CV L7810CD2T-TR
L7812C L7812CV L7812CD2T-TR L7812CP L7812CT
L7815C L7815CV L7815CD2T-TR L7815CP L7815CT
L7818C L7818CV L7818CD2T-TR(1) L7818CT
L7820C L7820CV L7820CD2T-TR(1) L7820CP(1) L7820CT(1)
L7824C L7824CV L7824CD2T-TR L7824CP L7824CT
1. Available on request.

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L78xx - L78xxC Revision history

9 Revision history

Table 27. 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 D2PAK mechanical data has been updated and add footprint data.
31-May-2007 15 Order codes has been updated.
29-Aug-2007 16 Added Table 1. in cover page.

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 L78xx - L78xxC

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