August 2007 Rev. 16 1/52
52
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
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
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.
TO-220FP
D2PAK
TO-220
TO-3
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
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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
L78xx - L78xxC List of figures
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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
List of tables L78xx - L78xxC
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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
L78xx - L78xxC Diagram
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1 Diagram
Figure 1. Block diagram
Pin configuration L78xx - L78xxC
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2 Pin configuration
Figure 2. Pin connections (top view)
TO220FP
TO-3
TO-220
D2PAK (Any Type)
Figure 3. Schematic diagram
L78xx - L78xxC Maximum ratings
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3 Maximum ratings
Note: Absolute Maximum Ratings are those values beyond which damage to the device may
occur. Functional operation under these condition is not implied
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
VIDC Input voltage for VO= 5 to 18 V 35 V
for VO= 20, 24 V 40
IOOutput current Internally Limited
PDPower dissipation Internally Limited
TSTG Storage temperature range -65 to 150 °C
TOP Operating junction temperature range for L7800 -55 to 150 °C
for L7800C 0 to 150
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
Maximum ratings L78xx - L78xxC
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Figure 4. Application circuits
L78xx - L78xxC Test circuits
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4 Test circuits
Figure 5. DC Parameter
Figure 6. Load regulation
Test circuits L78xx - L78xxC
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Figure 7. Ripple rejection
L78xx - L78xxC Electrical characteristics
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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
VOOutput voltage TJ = 25°C 4.8 5 5.2 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 8 to 20 V 4.65 5 5.35 V
ΔVO(1)
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.
Line regulation VI = 7 to 25 V, TJ = 25°C 3 50 mV
VI = 8 to 12 V, TJ = 25°C 1 25
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 100 mV
IO = 250 to 750 mA, TJ = 25°C 25
IdQuiescent current TJ = 25°C 6 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 2.5 V
ROOutput 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
Electrical characteristics L78xx - L78xxC
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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
VOOutput voltage TJ = 25°C 5.75 6 6.25 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 9 to 21 V 5.65 6 6.35 V
ΔVO(1) Line regulation VI = 8 to 25 V, TJ = 25°C 60 mV
VI = 9 to 13 V, TJ = 25°C 30
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 100 mV
IO = 250 to 750 mA, TJ = 25°C 30
IdQuiescent current TJ = 25°C 6 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 2.5 V
ROOutput 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.
L78xx - L78xxC Electrical characteristics
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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
VOOutput voltage TJ = 25°C 7.7 8 8.3 V
VOOutput voltage IO = 5 mA to 1A, PO ≤ 15 W
VI = 11.5 to 23 V 7.6 8 8.4 V
ΔVO(1) Line regulation VI = 10.5 to 25 V, TJ = 25°C 80 mV
VI = 11 to 17 V, TJ = 25°C 40
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 100 mV
IO = 250 to 750 mA, TJ = 25°C 40
IdQuiescent current TJ = 25°C 6 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 2.5 V
ROOutput 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.
Electrical characteristics L78xx - L78xxC
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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
VOOutput voltage TJ = 25°C 11.5 12 12.5 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 15.5 to 27 V 11.4 12 12.6 V
ΔVO(1) Line regulation VI = 14.5 to 30 V, TJ = 25°C 120 mV
VI = 16 to 22 V, TJ = 25°C 60
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 100 mV
IO = 250 to 750 mA, TJ = 25°C 60
IdQuiescent current TJ = 25°C 6 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 2.5 V
ROOutput 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.
L78xx - L78xxC Electrical characteristics
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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
VOOutput voltage TJ = 25°C 14.4 15 15.6 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 18.5 to 30 V 14.25 15 15.75 V
ΔVO(1) Line regulation VI = 17.5 to 30 V, TJ = 25°C 150 mV
VI = 20 to 26 V, TJ = 25°C 75
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 150 mV
IO = 250 to 750 mA, TJ = 25°C 75
IdQuiescent current TJ = 25°C 6 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 2.5 V
ROOutput 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.
Electrical characteristics L78xx - L78xxC
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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
VOOutput voltage TJ = 25°C 17.3 18 18.7 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 22 to 33 V 17.1 18 18.9 V
ΔVO(1) Line regulation VI = 21 to 33 V, TJ = 25°C 180 mV
VI = 24 to 30 V, TJ = 25°C 90
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 180 mV
IO = 250 to 750 mA, TJ = 25°C 90
IdQuiescent current TJ = 25°C 6 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 2.5 V
ROOutput 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.
L78xx - L78xxC Electrical characteristics
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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
VOOutput voltage TJ = 25°C 19.2 20 20.8 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 24 to 35 V 19 20 21 V
ΔVO(1) Line regulation VI = 22.5 to 35 V, TJ = 25°C 200 mV
VI = 26 to 32 V, TJ = 25°C 100
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 200 mV
IO = 250 to 750 mA, TJ = 25°C 100
IdQuiescent current TJ = 25°C 6 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 2.5 V
ROOutput 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.
Electrical characteristics L78xx - L78xxC
18/52
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
VOOutput voltage TJ = 25°C 23 24 25 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 28 to 38 V 22.8 24 25.2 V
ΔVO(1) Line regulation VI = 27 to 38 V, TJ = 25°C 240 mV
VI = 30 to 36 V, TJ = 25°C 120
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 240 mV
IO = 250 to 750 mA, TJ = 25°C 120
IdQuiescent current TJ = 25°C 6 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 2.5 V
ROOutput 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.
L78xx - L78xxC Electrical characteristics
19/52
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
VOOutput voltage TJ = 25°C 4.8 5 5.2 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 7 to 20 V 4.75 5 5.25 V
ΔVO(1) Line regulation VI = 7 to 25 V, TJ = 25°C 3 100 mV
VI = 8 to 12 V, TJ = 25°C 1 50
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 100 mV
IO = 250 to 750 mA, TJ = 25°C 50
IdQuiescent current TJ = 25°C 8 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
ROOutput 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.
Electrical characteristics L78xx - L78xxC
20/52
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
VOOutput voltage TJ = 25°C 5.0 5.2 5.4 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 8 to 20 V 4.95 5.2 5.45 V
ΔVO(1) Line regulation VI = 7 to 25 V, TJ = 25°C 3 105 mV
VI = 8 to 12 V, TJ = 25°C 1 52
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 105 mV
IO = 250 to 750 mA, TJ = 25°C 52
IdQuiescent current TJ = 25°C 8 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
ROOutput 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.
L78xx - L78xxC Electrical characteristics
21/52
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
VOOutput voltage TJ = 25°C 5.75 6 6.25 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 8 to 21 V 5.7 6 6.3 V
ΔVO(1) Line regulation VI = 8 to 25 V, TJ = 25°C 120 mV
VI = 9 to 13 V, TJ = 25°C 60
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 120 mV
IO = 250 to 750 mA, TJ = 25°C 60
IdQuiescent current TJ = 25°C 8 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
ROOutput 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.
Electrical characteristics L78xx - L78xxC
22/52
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
VOOutput voltage TJ = 25°C 7.7 8 8.3 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 10.5 to 25 V 7.6 8 8.4 V
ΔVO(1) Line regulation VI = 10.5 to 25 V, TJ = 25°C 160 mV
VI = 11 to 17 V, TJ = 25°C 80
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 160 mV
IO = 250 to 750 mA, TJ = 25°C 80
IdQuiescent current TJ = 25°C 8 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
ROOutput 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.
L78xx - L78xxC Electrical characteristics
23/52
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
VOOutput voltage TJ = 25°C 8.2 8.5 8.8 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 11 to 26 V 8.1 8.5 8.9 V
ΔVO(1) Line regulation VI = 11 to 27 V, TJ = 25°C 160 mV
VI = 11.5 to 17.5 V, TJ = 25°C 80
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 160 mV
IO = 250 to 750 mA, TJ = 25°C 80
IdQuiescent current TJ = 25°C 8 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
ROOutput 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.
Electrical characteristics L78xx - L78xxC
24/52
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
VOOutput voltage TJ = 25°C 8.64 9 9.36 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 11.5 to 26 V 8.55 9 9.45 V
ΔVO(1) Line regulation VI = 11.5 to 26 V, TJ = 25°C 180 mV
VI = 12 to 18 V, TJ = 25°C 90
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 180 mV
IO = 250 to 750 mA, TJ = 25°C 90
IdQuiescent current TJ = 25°C 8 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
ROOutput 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.
L78xx - L78xxC Electrical characteristics
25/52
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
VOOutput voltage TJ = 25°C 9.6 10 10.4 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 12.5 to 26 V 9.5 10 10.5 V
ΔVO(1) Line regulation VI = 12.5 to 26 V, TJ = 25°C 200 mV
VI = 13.5 to 19 V, TJ = 25°C 100
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 200 mV
IO = 250 to 750 mA, TJ = 25°C 100
IdQuiescent current TJ = 25°C 8 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
ROOutput 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.
Electrical characteristics L78xx - L78xxC
26/52
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
VOOutput voltage TJ = 25°C 11.5 12 12.5 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 14.5 to 27 V 11.4 12 12.6 V
ΔVO(1) Line regulation VI = 14.5 to 30 V, TJ = 25°C 240 mV
VI = 16 to 22 V, TJ = 25°C 120
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 240 mV
IO = 250 to 750 mA, TJ = 25°C 120
IdQuiescent current TJ = 25°C 8 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
ROOutput 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.
L78xx - L78xxC Electrical characteristics
27/52
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
VOOutput voltage TJ = 25°C 14.5 15 15.6 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 17.5 to 30 V 14.25 15 15.75 V
ΔVO(1) Line regulation VI = 17.5 to 30 V, TJ = 25°C 300 mV
VI = 20 to 26 V, TJ = 25°C 150
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 300 mV
IO = 250 to 750 mA, TJ = 25°C 150
IdQuiescent current TJ = 25°C 8 mA
ΔIdQuiescent current change IO = 5 mA to 1A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
ROOutput 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.
Electrical characteristics L78xx - L78xxC
28/52
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
VOOutput voltage TJ = 25°C 17.3 18 18.7 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 21 to 33 V 17.1 18 18.9 V
ΔVO(1) Line regulation VI = 21 to 33 V, TJ = 25°C 360 mV
VI = 24 to 30 V, TJ = 25°C 180
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 360 mV
IO = 250 to 750 mA, TJ = 25°C 180
IdQuiescent current TJ = 25°C 8 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
ROOutput 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.
L78xx - L78xxC Electrical characteristics
29/52
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
VOOutput voltage TJ = 25°C 19.2 20 20.8 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 23 to 35 V 19 20 21 V
ΔVO(1) Line regulation VI = 22.5 to 35 V, TJ = 25°C 400 mV
VI = 26 to 32 V, TJ = 25°C 200
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 400 mV
IO = 250 to 750 mA, TJ = 25°C 200
IdQuiescent current TJ = 25°C 8 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
ROOutput 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.
Electrical characteristics L78xx - L78xxC
30/52
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
VOOutput voltage TJ = 25°C 23 24 25 V
VOOutput voltage IO = 5 mA to 1 A, PO ≤ 15 W
VI = 27 to 38 V 22.8 24 25.2 V
ΔVO(1) Line regulation VI = 27 to 38 V, TJ = 25°C 480 mV
VI = 30 to 36 V, TJ = 25°C 240
ΔVO(1) Load regulation IO = 5 mA to 1.5 A, TJ = 25°C 480 mV
IO = 250 to 750 mA, TJ = 25°C 240
IdQuiescent current TJ = 25°C 8 mA
ΔIdQuiescent current change IO = 5 mA to 1 A 0.5 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
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
ROOutput 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.
L78xx - L78xxC Typical performance
31/52
6 Typical performance
Figure 8. Dropout voltage vs junction
temperature
Figure 9. Peak output current vs input/output
differential voltage
Figure 10. Supply voltage rejection vs
frequency
Figure 11. Output voltage vs junction
temperature
Figure 12. Output impedance vs frequency Figure 13. Quiescent current vs junction temp.
Typical performance L78xx - L78xxC
32/52
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.
Figure 14. Load transient response Figure 15. Line transient response
Figure 16. Quiescent current vs input voltage
Figure 17. Fixed output regulator
L78xx - L78xxC Typical performance
33/52
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)
Typical performance L78xx - L78xxC
34/52
Figure 21. 0.5 to 10V Regulator
VO=VXXR4/R1
Figure 22. High current voltage regulator
IO = IREG + Q1 (IREG ______)
VBEQ1
R1
R1 = ______________
VBEQ1
IREQ-(IQ1/βQ1)
Figure 23. High output current with short circuit protection
RSC=VBEQ2/ISC
L78xx - L78xxC Typical performance
35/52
* Against potential latch-up problems.
Figure 24. Tracking voltage regulator
Figure 25. Split power supply (± 15V - 1 A)
Typical performance L78xx - L78xxC
36/52
Figure 26. Negative output voltage circuit
Figure 27. Switching regulator
Figure 28. High input voltage circuit
VIN = VI - (VZ + VBE)
L78xx - L78xxC Typical performance
37/52
Figure 29. High input voltage circuit
Figure 30. High output voltage regulator
Figure 31. High input and output voltage
VO = VXX + VZ1
Typical performance L78xx - L78xxC
38/52
Note: The circuit performs well up to 100 KHz.
Figure 32. Reducing power dissipation with dropping resistor
R = ____________________
VI(min)-VXX-VDROP(max)
IO(max)+Id(max)
Figure 33. Remote shutdown
Figure 34. Power AM modulator (unity voltage gain, IO ≤ 0.5)
L78xx - L78xxC Typical performance
39/52
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 35. Adjustable output voltage with temperature compensation
VO = VXX (1+R2/R1) + VBE
Figure 36. Light controllers (VOmin = VXX + VBE)
VO rises when the light goes up
VO falls when the light goes up
Typical performance L78xx - L78xxC
40/52
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.
Figure 37. Protection against input short-circuit with high capacitance loads
L78xx - L78xxC Package mechanical data
41/52
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.
Package mechanical data L78xx - L78xxC
42/52
Dim. mm. inch.
Min. Typ. Max. Min. Typ. Max.
A 11.85 0.466
B0.96 1.05 1.10 0.037 0.041 0.043
C 1.70 0.066
D8.7 0.342
E 20.0 0.787
G 10.90.429
N 16.90.665
P 26.2 1.031
R3.88 4.090.152 0.161
U39.5 1.555
V30.10 1.185
TO-3 mechanical data
P003C/C
E
B
R
C
D
A
P
G
N
V
U
O
L78xx - L78xxC Package mechanical data
43/52
Dim. mm. inch.
Min. Typ. Max. Min. Typ. Max.
A 4.40 4.60 0.1730.181
b0.61 0.88 0.024 0.035
b1 1.15 1.70 0.045 0.067
c0.490.70 0.0190.028
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
F1.231.32 0.0480.052
H1 6.2 6.6 0.244 0.260
J1 2.40 2.72 0.094 0.107
L13.0 14.0 0.512 0.551
L1 3.5 3.93 0.138 0.155
L20 16.4 0.646
L3028.91.138
φP3.75 3.85 0.1480.152
Q 2.65 2.95 0.104 0.116
TO-220 (A type) mechanical data
0015988/N
Package mechanical data L78xx - L78xxC
44/52
Dim. mm. inch.
Min. Typ Max. Min. Typ. Max.
A 4.40 4.60 0.1730.181
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 0.0300.039
F1 1.15 1.50 0.045 0.059
F2 1.15 1.50 0.045 0.059
G4.95 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
L328.6 30.6 1.126 1.204
L4 9.810.6 0.3850.417
L5 2.93.6 0.114 0.142
L6 15.916.4 0.626 0.645
L7 99.30.354 0.366
DIA. 33.2 0.1180.126
TO-220FP mechanical data
7012510A-
H
L78xx - L78xxC Package mechanical data
45/52
Figure 38. Drawing dimension D2PAK (type STD-ST)
0079457/L
Package mechanical data L78xx - L78xxC
46/52
Figure 39. Drawing dimension D2PAK (type WOOSEOK-SUBCON.)
0079457/L
L78xx - L78xxC Package mechanical data
47/52
Note: The D2PAK package coming from the subcontractor Wooseok is fully compatible with the
ST's package suggested footprint.
Table 24. D2PAK mechanical data
DIM.
TYPE STD-ST TYPE WOOSEOK-SUBCON.
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
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
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°
Package mechanical data L78xx - L78xxC
48/52
Figure 40. D2PAK footprint recommended data
Table 25. Footprint data
VALUES
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
L78xx - L78xxC Package mechanical data
49/52
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A180 7.086
C 12.813.0 13.2 0.504 0.512 0.519
D 20.2 0.795
N60 2.362
T 14.4 0.567
Ao 10.50 10.6 10.70 0.4130.417 0.421
Bo 15.70 15.80 15.90 0.6180.622 0.626
Ko 4.80 4.90 5.00 0.189 0.193 0.197
Po 3.94.0 4.1 0.1530.157 0.161
P 11.912.0 12.1 0.4680.472 0.476
Tape & reel D2PAK-P2PAK-D2PAK/A-P2PAK/A mechanical data
Order code L78xx - L78xxC
50/52
8 Order code
Table 26. Order code
Part numbers
Packaging
TO-220
(A Type) D2PAK TO-220FP TO-3
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
L7885C L7885CV L7885CD2T-TR(1) L7885CP(1) L7885CT(1)
L7809C L7809CV L7809CD2T-TR L7809CP L7809CT
L7810C L7810CV L7810CD2T-TR(1)
1. Available on request.
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
L78xx - L78xxC Revision history
51/52
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.
L78xx - L78xxC
52/52
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