January 2010 Doc ID 2143 Rev 20 1/58
58
L78xx - L78xxC
L78xxAB - L78xxAC
Positive voltage regulators
Features
Output current up to 1.5 A
Output voltages of 5; 6; 8; 8.5; 9; 12; 15; 18;
24 V
Thermal overload protection
Short circuit protection
Output transition SOA protection
2 % output voltage tolerance (A version)
Guaranteed in extended temperature range (A
version)
Description
The L78xx series of three-terminal positive
regulators is available in TO-220, TO-220FP, TO-
3, D²PAK and DPAK 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
TO-3
TO-220
D²PAK
DPAK
Table 1. Device summary
Part numbers
L7805 L7806AC L7809AB L7815AB
L7805C L7808C L7809AC L7815AC
L7805AB L7808AB L7812C L7818C
L7805AC L7808AC L7812AB L7824C
L7806C L7885C L7812AC L7824AB
L7806AB L7809C L7815C L7824AC
www.st.com
Contents L78xx, L78xxC, L78xxAB, L78xxAC
2/58 Doc ID 2143 Rev 20
Contents
1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.1 Design consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
9 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
L78xx, L78xxC, L78xxAB, L78xxAC List of tables
Doc ID 2143 Rev 20 3/58
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 3. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 4. Electrical characteristics of L7805 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 5. Electrical characteristics of L7805A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 6. Electrical characteristics of L7806A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 7. Electrical characteristics of L7808A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 8. Electrical characteristics of L7809A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 9. Electrical characteristics of L7812A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 10. Electrical characteristics of L7815A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 11. Electrical characteristics of L7824A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 12. Electrical characteristics of L7805C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 13. Electrical characteristics of L7806C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 14. Electrical characteristics of L7808C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 15. Electrical characteristics of L7885C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 16. Electrical characteristics of L7809C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 17. Electrical characteristics of L7810C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 18. Electrical characteristics of L7812C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 19. Electrical characteristics of L7815C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 20. Electrical characteristics of L7818C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 21. Electrical characteristics of L7820C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 22. Electrical characteristics of L7824C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 23. TO-220 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 24. TO-220FP mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 25. TO-3 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table 26. DPAK mechanical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Table 27. Tape and reel DPAK mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Table 28. D²PAK mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Table 29. D²PAK footprint data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 30. Tape and reel D²PAK mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 31. Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 32. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
List of figures L78xx, L78xxC, L78xxAB, L78xxAC
4/58 Doc ID 2143 Rev 20
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2. Pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 3. Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4. Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5. DC parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 6. Load regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 7. Ripple rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 8. DC parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 9. DC parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 10. DC parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 11. DC parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 12. Fixed output regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 13. Current regulator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 14. Circuit for increasing output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 15. Adjustable output regulator (7 to 30 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 16. 0.5 to 10 V regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 17. High current voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 18. High output current with short circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 19. Tracking voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 20. Split power supply (± 15 V - 1 A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 21. Negative output voltage circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 22. Switching regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 23. High input voltage circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 24. High input voltage circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 25. High output voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 26. High input and output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 27. Reducing power dissipation with dropping resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 28. Remote shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 29. Power AM modulator (unity voltage gain, IO 0.5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 30. Adjustable output voltage with temperature compensation . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 31. Light controllers (VO(min) = VXX + VBE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 32. Protection against input short-circuit with high capacitance loads . . . . . . . . . . . . . . . . . . . 38
Figure 33. Dropout voltage vs. junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 34. Peak output current vs. input/output differential voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 35. Supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 36. Output voltage vs. junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 37. Output impedance vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 38. Quiescent current vs. junction temp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 39. Load transient response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 40. Line transient response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 41. Quiescent current vs. input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 42. Drawing dimension TO-220 (type STD-ST Dual Gauge) . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 43. Drawing dimension TO-220 (type STD-ST Single Gauge) . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 44. Drawing dimension tube for TO-220 Dual Gauge (mm.) . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 45. Drawing dimension tube for TO-220 Single Gauge (mm.) . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 46. Drawing dimension TO-220FP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 47. Drawing dimension TO-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 48. Drawing dimension DPAK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 49. Drawing dimension tape and reel for DPAK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Figure 50. Drawing dimension D²PAK (type STD-ST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
L78xx, L78xxC, L78xxAB, L78xxAC List of figures
Doc ID 2143 Rev 20 5/58
Figure 51. Drawing dimension D²PAK (type WOOSEOK-Subcon.). . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Figure 52. D²PAK footprint recommended data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Figure 53. Drawing dimension tape and reel for D²PAK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Diagram L78xx, L78xxC, L78xxAB, L78xxAC
6/58 Doc ID 2143 Rev 20
1 Diagram
Figure 1. Block diagram
L78xx, L78xxC, L78xxAB, L78xxAC Pin configuration
Doc ID 2143 Rev 20 7/58
2 Pin configuration
Figure 2. Pin connections (top view)
TO-220FP
TO-3
TO-220
D²PAK (Any Type) DPAK
Figure 3. Schematic diagram
Maximum ratings L78xx, L78xxC, L78xxAB, L78xxAC
8/58 Doc ID 2143 Rev 20
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 L78xx -55 to 150
°Cfor L78xxC, L78xxAC 0 to 125
for L78xxAB -40 to 125
Table 3. Thermal data
Symbol Parameter D²PAK DPAK TO-220 TO-220FP TO-3 Unit
RthJC Thermal resistance junction-case 3 8 5 5 4 °C/W
RthJA Thermal resistance junction-ambient 62.5 100 50 60 35 °C/W
Figure 4. Application circuits
L78xx, L78xxC, L78xxAB, L78xxAC Test circuits
Doc ID 2143 Rev 20 9/58
4 Test circuits
Figure 5. DC parameter
Figure 6. Load regulation
Figure 7. Ripple rejection
Electrical characteristics L78xx, L78xxC, L78xxAB, L78xxAC
10/58 Doc ID 2143 Rev 20
5 Electrical characteristics
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.
Table 4. Electrical characteristics of L7805
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, VI = 8 to 20 V 4.65 5 5.35 V
ΔVO(1) 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
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, L78xxAB, L78xxAC Electrical characteristics
Doc ID 2143 Rev 20 11/58
VI = 10 V, IO = 1 A, TJ = 0 to 125 °C (L7805AC), TJ = -40 to 125 °C (L7805AB), unless
otherwise specified.
Table 5. Electrical characteristics of L7805A
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25°C 4.9 5 5.1 V
VOOutput voltage IO = 5 mA to 1 A, VI = 7.5 to 18 V 4.8 5 5.2 V
VOOutput voltage IO = 1 A, VI = 18 to 20 V, TJ = 25°C 4.8 5 5.2 V
ΔVO (1) Line regulation
VI = 7.5 to 25 V, IO = 500 mA 7 50 mV
VI = 8 to 12 V 10 50 mV
VI = 8 to 12 V, TJ = 25°C 2 25 mV
VI = 7.3 to 20 V, TJ = 25°C 7 50 mV
ΔVO (1) Load regulation
IO = 5 mA to 1 A 25 100 mV
IO = 5 mA to 1.5 A, TJ = 25°C 30 100 V
IO = 250 to 750 mA 8 50 V
IqQuiescent current TJ = 25°C 4.3 6 mA
6mA
ΔIqQuiescent current change
VI = 8 to 23 V, IO = 500 mA 0.8 mA
VI = 7.5 to 20 V, TJ = 25°C 0.8 mA
IO = 5 mA to 1 A 0.5 mA
SVR Supply voltage rejection VI = 8 to 18 V, f = 120 Hz, IO = 500 mA 68 dB
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
eN Output noise voltage TA = 25°C, B =10 Hz to 100 kHz 10 µV/VO
ROOutput resistance f = 1 kHz 17 mΩ
Isc Short circuit current VI = 35 V, TA = 25°C 0.2 A
Iscp Short circuit peak current TJ = 25°C 2.2 A
ΔVO/ΔT Output voltage drift -1.1 mV/°C
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, L78xxAB, L78xxAC
12/58 Doc ID 2143 Rev 20
VI = 11 V, IO = 1 A, TJ = 0 to 125 °C (L7806AC), TJ = -40 to 125 °C (L7806AB), unless
otherwise specified.
Table 6. Electrical characteristics of L7806A
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25°C 5.88 6 6.12 V
VOOutput voltage IO = 5 mA to 1 A, VI = 8.6 to 19 V 5.76 6 6.24 V
VOOutput voltage IO = 1 A, VI = 19 to 21 V, TJ = 25°C 5.76 6 6.24 V
ΔVO (1) Line regulation
VI = 8.6 to 25 V, IO = 500 mA 9 60 mV
VI = 9 to 13 V 11 60 mV
VI = 9 to 13 V, TJ = 25°C 3 30 mV
VI = 8.3 to 21 V, TJ = 25°C 9 60 mV
ΔVO (1) Load regulation
IO = 5 mA to 1 A 25 100 mV
IO = 5 mA to 1.5 A, TJ = 25°C 30 100 V
IO = 250 to 750 mA 10 50 V
IqQuiescent current TJ = 25°C 4.3 6 mA
6mA
ΔIqQuiescent current change
VI = 9 to 24 V, IO = 500 mA 0.8 mA
VI = 8.6 to 21 V, TJ = 25°C 0.8 mA
IO = 5 mA to 1 A 0.5 mA
SVR Supply voltage rejection VI = 9 to 19 V, f = 120 Hz, IO = 500 mA 65 dB
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
eN Output noise voltage TA = 25°C, B =10 Hz to 100 kHz 10 µV/VO
ROOutput resistance f = 1 kHz 17 mΩ
Isc Short circuit current VI = 35 V, TA = 25°C 0.2 A
Iscp Short circuit peak current TJ = 25°C 2.2 A
ΔVO/ΔT Output voltage drift -0.8 mV/°C
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, L78xxAB, L78xxAC Electrical characteristics
Doc ID 2143 Rev 20 13/58
VI = 14 V, IO = 1 A, TJ = 0 to 125 °C (L7808AC), TJ = -40 to 125 °C (L7808AB), unless
otherwise specified.
Table 7. Electrical characteristics of L7808A
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25°C 7.84 8 8.16 V
VOOutput voltage IO = 5 mA to 1 A, VI = 10.6 to 21 V 7.7 8 8.3 V
VOOutput voltage IO = 1 A, VI = 21 to 23 V, TJ = 25°C 7.7 8 8.3 V
ΔVO (1) Line regulation
VI = 10.6 to 25 V, IO = 500 mA 12 80 mV
VI = 11 to 17 V 15 80 mV
VI = 11 to 17 V, TJ = 25°C 5 40 mV
VI = 10.4 to 23 V, TJ = 25°C 12 80 mV
ΔVO (1) Load regulation
IO = 5 mA to 1 A 25 100 mV
IO = 5 mA to 1.5 A, TJ = 25°C 30 100 V
IO = 250 to 750 mA 10 50 V
IqQuiescent current TJ = 25°C 4.3 6 mA
6mA
ΔIqQuiescent current change
VI = 11 to 23 V, IO = 500 mA 0.8 mA
VI = 10.6 to 23 V, TJ = 25°C 0.8 mA
IO = 5 mA to 1 A 0.5 mA
SVR Supply voltage rejection VI = 11.5 to 21.5 V, f = 120 Hz,
IO = 500 mA 62 dB
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
eN Output noise voltage TA = 25°C, B =10 Hz to 100 kHz 10 µV/VO
ROOutput resistance f = 1 kHz 18 mΩ
Isc Short circuit current VI = 35 V, TA = 25°C 0.2 A
Iscp Short circuit peak current TJ = 25°C 2.2 A
ΔVO/ΔT Output voltage drift -0.8 mV/°C
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, L78xxAB, L78xxAC
14/58 Doc ID 2143 Rev 20
VI = 15 V, IO = 1 A, TJ = 0 to 125 °C (L7809AC), TJ = -40 to 125 °C (L7809AB), unless
otherwise specified.
Table 8. Electrical characteristics of L7809A
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25°C 8.82 9 9.18 V
VOOutput voltage IO = 5 mA to 1 A, VI = 10.6 to 22 V 8.65 9 9.35 V
VOOutput voltage IO = 1 A, VI = 22 to 24 V, TJ = 25°C 8.65 9 9.35 V
ΔVO (1) Line regulation
VI = 10.6 to 25 V, IO = 500 mA 12 90 mV
VI = 11 to 17 V 15 90 mV
VI = 11 to 17 V, TJ = 25°C 5 45 mV
VI = 10.4 to 23 V, TJ = 25°C 12 90 mV
ΔVO (1) Load regulation
IO = 5 mA to 1 A 25 100 mV
IO = 5 mA to 1.5 A, TJ = 25°C 30 100 V
IO = 250 to 750 mA 10 50 V
IqQuiescent current TJ = 25°C 4.3 6 mA
6mA
ΔIqQuiescent current change
VI = 11 to 25 V, IO = 500 mA 0.8 mA
VI = 10.6 to 23 V, TJ = 25°C 0.8 mA
IO = 5 mA to 1 A 0.5 mA
SVR Supply voltage rejection VI = 11.5 to 21.5 V, f = 120 Hz,
IO = 500 mA 61 dB
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
eN Output noise voltage TA = 25°C, B =10 Hz to 100 kHz 10 µV/VO
ROOutput resistance f = 1 kHz 18 mΩ
Isc Short circuit current VI = 35 V, TA = 25°C 0.2 A
Iscp Short circuit peak current TJ = 25°C 2.2 A
ΔVO/ΔT Output voltage drift -0.8 mV/°C
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, L78xxAB, L78xxAC Electrical characteristics
Doc ID 2143 Rev 20 15/58
VI = 19 V, IO = 1 A, TJ = 0 to 125 °C (L7812AC), TJ = -40 to 125 °C (L7812AB), unless
otherwise specified.
Table 9. Electrical characteristics of L7812A
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25°C 11.75 12 12.25 V
VOOutput voltage IO = 5 mA to 1 A, VI = 14.8 to 25 V 11.5 12 12.5 V
VOOutput voltage IO = 1 A, VI = 25 to 27 V, TJ = 25°C 11.5 12 12.5 V
ΔVO (1) Line regulation
VI = 14.8 to 30 V, IO = 500 mA 13 120 mV
VI = 16 to 12 V 16 120 mV
VI = 16 to 12 V, TJ = 25°C 6 60 mV
VI = 14.5 to 27 V, TJ = 25°C 13 120 mV
ΔVO (1) Load regulation
IO = 5 mA to 1 A 25 100 mV
IO = 5 mA to 1.5 A, TJ = 25°C 30 100 V
IO = 250 to 750 mA 10 50 V
IqQuiescent current TJ = 25°C 4.4 6 mA
6mA
ΔIqQuiescent current change
VI = 15 to 30 V, IO = 500 mA 0.8 mA
VI = 14.8 to 27 V, TJ = 25°C 0.8 mA
IO = 5 mA to 1 A 0.5 mA
SVR Supply voltage rejection VI = 15 to 25 V, f = 120 Hz, IO = 500 mA 60 dB
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
eN Output noise voltage TA = 25°C, B = 10 Hz to 100 kHz 10 µV/VO
ROOutput resistance f = 1 kHz 18 mΩ
Isc Short circuit current VI = 35 V, TA = 25°C 0.2 A
Iscp Short circuit peak current TJ = 25°C 2.2 A
ΔVO/ΔT Output voltage drift -1 mV/°C
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, L78xxAB, L78xxAC
16/58 Doc ID 2143 Rev 20
VI = 23 V, IO = 1 A, TJ = 0 to 125 °C (L7815AC), TJ = -40 to 125 °C (L7815AB), unless
otherwise specified.
Table 10. Electrical characteristics of L7815A
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25°C 14.7 15 15.3 V
VOOutput voltage IO = 5 mA to 1 A, VI = 17.9 to 28 V 14.4 15 15.6 V
VOOutput voltage IO = 1 A, VI = 28 to 30 V, TJ = 25°C 14.4 15 15.6 V
ΔVO (1) Line regulation
VI = 17.9 to 30 V, IO = 500 mA 13 150 mV
VI = 20 to 26 V 16 150 mV
VI = 20 to 26 V, TJ = 25°C 6 75 mV
VI = 17.5 to 30 V, TJ = 25°C 13 150 mV
ΔVO (1) Load regulation
IO = 5 mA to 1 A 25 100 mV
IO = 5 mA to 1.5 A, TJ = 25°C 30 100 V
IO = 250 to 750 mA 10 50 V
IqQuiescent current TJ = 25°C 4.4 6 mA
6mA
ΔIqQuiescent current change
VI = 17.5 to 30 V, IO = 500 mA 0.8 mA
VI = 17.5 to 30 V, TJ = 25°C 0.8 mA
IO = 5 mA to 1 A 0.5 mA
SVR Supply voltage rejection VI = 18.5 to 28.5 V, f = 120 Hz,
IO = 500 mA 58 dB
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
eN Output noise voltage TA = 25°C, B = 10Hz to 100 kHz 10 µV/VO
ROOutput resistance f = 1 kHz 19 mΩ
Isc Short circuit current VI = 35 V, TA = 25°C 0.2 A
Iscp Short circuit peak current TJ = 25°C 2.2 A
ΔVO/ΔT Output voltage drift -1 mV/°C
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, L78xxAB, L78xxAC Electrical characteristics
Doc ID 2143 Rev 20 17/58
VI = 33 V, IO = 1 A, TJ = 0 to 125 °C (L7824AC), TJ = -40 to 125 °C (L7824AB), unless
otherwise specified.
Table 11. Electrical characteristics of L7824A
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25°C 23.5 24 24.5 V
VOOutput voltage IO = 5 mA to 1 A, VI = 27.3 to 37 V 23 24 25 V
VOOutput voltage IO = 1 A, VI = 37 to 38 V, TJ = 25°C 23 24 25 V
ΔVO (1) Line regulation
VI = 27 to 38 V, IO = 500 mA 31 240 mV
VI = 30 to 36 V 35 200 mV
VI = 30 to 36 V, TJ = 25°C 14 120 mV
VI = 26.7 to 38 V, TJ = 25°C 31 240 mV
ΔVO (1) Load regulation
IO = 5 mA to 1 A 25 100 mV
IO = 5 mA to 1.5 A, TJ = 25°C 30 100 V
IO = 250 to 750 mA 10 50 V
IqQuiescent current TJ = 25°C 4.6 6 mA
6mA
ΔIqQuiescent current change
VI = 27.3 to 38 V, IO = 500 mA 0.8 mA
VI = 27.3 to 38 V, TJ = 25°C 0.8 mA
IO = 5 mA to 1 A 0.5 mA
SVR Supply voltage rejection VI = 28 to 38 V, f = 120 Hz, IO = 500 mA 54 dB
VdDropout voltage IO = 1 A, TJ = 25°C 2 V
eN Output noise voltage TA = 25°C, B = 10 Hz to 100 kHz 10 µV/VO
ROOutput resistance f = 1 kHz 20 mΩ
Isc Short circuit current VI = 35 V, TA = 25°C 0.2 A
Iscp Short circuit peak current TJ = 25°C 2.2 A
ΔVO/ΔT Output voltage drift -1.5 mV/°C
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, L78xxAB, L78xxAC
18/58 Doc ID 2143 Rev 20
Refer to the test circuits, TJ = 0 to 125 °C, VI = 10 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
Table 12. Electrical characteristics of L7805C
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, VI = 7 to 18 V 4.75 5 5.25 V
VOOutput voltage IO = 1 A, VI = 18 to 20V, TJ = 25°C 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 23 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.
L78xx, L78xxC, L78xxAB, L78xxAC Electrical characteristics
Doc ID 2143 Rev 20 19/58
Refer to the test circuits, TJ = 0 to 125 °C, VI = 11 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
Table 13. Electrical characteristics of L7806C
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, VI = 8 to 19 V 5.7 6 6.3 V
VOOutput voltage IO = 1 A, VI = 19 to 21 V, TJ = 25°C 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 24 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, L78xxAB, L78xxAC
20/58 Doc ID 2143 Rev 20
Refer to the test circuits, TJ = 0 to 125 °C, VI = 14 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
Table 14. Electrical characteristics of L7808C
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, VI = 10.5 to 21 V 7.6 8 8.4 V
VOOutput voltage IO = 1 A, VI = 21 to 25 V, TJ = 25°C 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.