L7805C

Manufacturer Part NumberL7805C
DescriptionPositive voltage regulators
ManufacturerSTMicroelectronics
L7805C datasheet
 


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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.
Table 1.
Device summary
L7805
L7805C
L7805AB
L7805AC
L7806C
L7806AB
February 2012
L78xxAB - L78xxAC
Positive voltage regulator ICs
TO-220
TO-3
Part numbers
L7806AC
L7809AB
L7808C
L7809AC
L7808AB
L7812C
L7808AC
L7812AB
L7885C
L7812AC
L7809C
L7815C
Doc ID 2143 Rev 26
L78xx - L78xxC
TO-220FP
DPAK
D²PAK
L7815AB
L7815AC
L7818C
L7824C
L7824AB
L7824AC
1/57
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L7805C Summary of contents

  • Page 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 L7805 L7805C L7805AB L7805AC L7806C L7806AB February 2012 L78xxAB - L78xxAC Positive voltage regulator ICs ...

  • Page 2

    Contents Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Page 3

    ... Electrical characteristics of L7808A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 8. Electrical characteristics of L7809A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Table 9. Electrical characteristics of L7812A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 10. Electrical characteristics of L7815A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table 11. Electrical characteristics of L7824A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table 12. Electrical characteristics of L7805C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Table 13. Electrical characteristics of L7806C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Table 14. Electrical characteristics of L7808C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Table 15. Electrical characteristics of L7885C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Table 16. Electrical characteristics of L7809C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Table 17. ...

  • Page 4

    List of figures List of figures Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Page 5

    L78xx, L78xxC, L78xxAB, L78xxAC 1 Diagram Figure 1. Block diagram Doc ID 2143 Rev 26 Diagram 5/57 ...

  • Page 6

    Pin configuration 2 Pin configuration Figure 2. Pin connections (top view) TO-220 D²PAK (Any Type) Figure 3. Schematic diagram 6/57 L78xx, L78xxC, L78xxAB, L78xxAC DPAK Doc ID 2143 Rev 26 TO-220FP TO-3 ...

  • Page 7

    L78xx, L78xxC, L78xxAB, L78xxAC 3 Maximum ratings Table 2. Absolute maximum ratings Symbol V DC input voltage I I Output current O P Power dissipation D T Storage temperature range STG T Operating junction temperature range OP Note: Absolute maximum ...

  • Page 8

    Test circuits 4 Test circuits Figure 5. DC parameter Figure 6. Load regulation Figure 7. Ripple rejection 8/57 L78xx, L78xxC, L78xxAB, L78xxAC Doc ID 2143 Rev 26 ...

  • Page 9

    L78xx, L78xxC, L78xxAB, L78xxAC 5 Electrical characteristics Refer to the test circuits 0.1 µF unless otherwise specified. O Table 4. Electrical characteristics of L7805 Symbol Parameter V Output voltage O V Output voltage O (1) ΔV Line ...

  • Page 10

    Electrical characteristics otherwise specified. Table 5. Electrical characteristics of L7805A Symbol Parameter V Output voltage O V Output voltage O V Output voltage O ΔV (1) Line regulation O ...

  • Page 11

    L78xx, L78xxC, L78xxAB, L78xxAC 125 °C (L7806AC otherwise specified. Table 6. Electrical characteristics of L7806A Symbol Parameter V Output voltage O V Output voltage O ...

  • Page 12

    Electrical characteristics 125 °C (L7808AC otherwise specified. Table 7. Electrical characteristics of L7808A Symbol Parameter V Output voltage O V Output voltage O V Output ...

  • Page 13

    L78xx, L78xxC, L78xxAB, L78xxAC 125 °C (L7809AC otherwise specified. Table 8. Electrical characteristics of L7809A Symbol Parameter V Output voltage O V Output voltage O ...

  • Page 14

    Electrical characteristics 125 °C (L7812AC otherwise specified. Table 9. Electrical characteristics of L7812A Symbol Parameter V Output voltage O V Output voltage O V Output ...

  • Page 15

    L78xx, L78xxC, L78xxAB, L78xxAC 125 °C (L7815AC otherwise specified. Table 10. Electrical characteristics of L7815A Symbol Parameter V Output voltage O V Output voltage O ...

  • Page 16

    Electrical characteristics 125 °C (L7824AC otherwise specified. Table 11. Electrical characteristics of L7824A Symbol Parameter V Output voltage O V Output voltage O V Output ...

  • Page 17

    ... L78xx, L78xxC, L78xxAB, L78xxAC Refer to the test circuits, T unless otherwise specified. Table 12. Electrical characteristics of L7805C Symbol Parameter V Output voltage O V Output voltage O V Output voltage O ΔV (1) Line regulation O (1) ΔV Load regulation O I Quiescent current d ΔI Quiescent current change d ΔV /ΔT ...

  • Page 18

    Electrical characteristics Refer to the test circuits, T unless otherwise specified. Table 13. Electrical characteristics of L7806C Symbol Parameter V Output voltage O V Output voltage O V Output voltage O ΔV (1) Line regulation O (1) ΔV Load regulation ...

  • Page 19

    L78xx, L78xxC, L78xxAB, L78xxAC Refer to the test circuits, T unless otherwise specified. Table 14. Electrical characteristics of L7808C Symbol Parameter V Output voltage O V Output voltage O V Output voltage O ΔV (1) Line regulation O (1) ΔV ...

  • Page 20

    Electrical characteristics Refer to the test circuits 0.1 µF unless otherwise specified. O Table 15. Electrical characteristics of L7885C Symbol Parameter V Output voltage O V Output voltage O V Output voltage O ΔV (1) Line regulation ...

  • Page 21

    L78xx, L78xxC, L78xxAB, L78xxAC Refer to the test circuits, T unless otherwise specified. Table 16. Electrical characteristics of L7809C Symbol Parameter V Output voltage O V Output voltage O V Output voltage O ΔV (1) Line regulation O (1) ΔV ...

  • Page 22

    Electrical characteristics Refer to the test circuits, T unless otherwise specified. Table 17. Electrical characteristics of L7810C Symbol Parameter V Output voltage O V Output voltage O V Output voltage O ΔV (1) Line regulation O (1) ΔV Load regulation ...

  • Page 23

    L78xx, L78xxC, L78xxAB, L78xxAC Refer to the test circuits, T unless otherwise specified. Table 18. Electrical characteristics of L7812C Symbol Parameter V Output voltage O V Output voltage O V Output voltage O ΔV (1) Line regulation O (1) ΔV ...

  • Page 24

    Electrical characteristics Refer to the test circuits, T unless otherwise specified. Table 19. Electrical characteristics of L7815C Symbol Parameter V Output voltage O V Output voltage O V Output voltage O ΔV (1) Line regulation O (1) ΔV Load regulation ...

  • Page 25

    L78xx, L78xxC, L78xxAB, L78xxAC Refer to the test circuits, T unless otherwise specified. Table 20. Electrical characteristics of L7818C Symbol Parameter V Output voltage O V Output voltage O V Output voltage O ΔV (1) Line regulation O (1) ΔV ...

  • Page 26

    Electrical characteristics Refer to the test circuits, T unless otherwise specified. Table 21. Electrical characteristics of L7820C Symbol Parameter V Output voltage O V Output voltage O V Output voltage O ΔV (1) Line regulation O (1) ΔV Load regulation ...

  • Page 27

    L78xx, L78xxC, L78xxAB, L78xxAC Refer to the test circuits, T unless otherwise specified. Table 22. Electrical characteristics of L7824C Symbol Parameter V Output voltage O V Output voltage O V Output voltage O ΔV (1) Line regulation O (1) ΔV ...

  • Page 28

    Application information 6 Application information 6.1 Design consideration The L78xx Series of fixed voltage regulators are designed with thermal overload protection that shuts down the circuit when subjected to an excessive power overload condition, internal short-circuit protection that limits the ...

  • Page 29

    L78xx, L78xxC, L78xxAB, L78xxAC Figure 9. Current regulator Figure 10. Circuit for increasing output voltage ≥ (1 ...

  • Page 30

    Application information Figure 12. 0 regulator Figure 13. High current voltage regulator V BEQ1 R = ______________ REQ BEQ1 I = ...

  • Page 31

    L78xx, L78xxC, L78xxAB, L78xxAC Figure 15. Tracking voltage regulator Figure 16. Split power supply (± Against potential latch-up problems. Doc ID 2143 Rev 26 Application information 31/57 ...

  • Page 32

    Application information Figure 17. Negative output voltage circuit Figure 18. Switching regulator Figure 19. High input voltage circuit (configuration 32/57 L78xx, L78xxC, L78xxAB, L78xxAC Doc ID 2143 ...

  • Page 33

    L78xx, L78xxC, L78xxAB, L78xxAC Figure 20. High input voltage circuit (configuration 2) Figure 21. High output voltage regulator Figure 22. High input and output voltage Doc ID 2143 Rev 26 Application information ...

  • Page 34

    Application information Figure 23. Reducing power dissipation with dropping resistor I(min) XX DROP(max ____________________ I +I O(max) d(max) Figure 24. Remote shutdown Figure 25. Power AM modulator (unity voltage gain, I Note: The circuit performs ...

  • Page 35

    L78xx, L78xxC, L78xxAB, L78xxAC Figure 26. Adjustable output voltage with temperature compensation (1 Note connected as a diode in order to compensate the variation of the ...

  • Page 36

    Application information Figure 28. Protection against input short-circuit with high capacitance loads Note: Application with high capacitance loads and an output voltage greater than 6 volts need an external diode (see this case the input voltage falls rapidly while the ...

  • Page 37

    L78xx, L78xxC, L78xxAB, L78xxAC 7 Typical performance Figure 29. Dropout voltage vs. junction temperature Figure 31. Supply voltage rejection vs. frequency Figure 33. Output impedance vs. frequency Figure 30. Peak output current vs. input/output differential voltage Figure 32. Output voltage ...

  • Page 38

    Typical performance Figure 35. Load transient response Figure 37. Quiescent current vs. input voltage 38/57 L78xx, L78xxC, L78xxAB, L78xxAC Figure 36. Line transient response Doc ID 2143 Rev 26 ...

  • Page 39

    L78xx, L78xxC, L78xxAB, L78xxAC 8 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are ...

  • Page 40

    Package mechanical data Figure 38. Drawing dimension TO-220 (type STD-ST Dual Gauge) Note: 1 Maximum resin gate protrusion: 0.5 mm. 2 Resin gate position is accepted in each of the two positions shown on the drawing, or their symmetrical. 40/57 ...

  • Page 41

    L78xx, L78xxC, L78xxAB, L78xxAC Figure 39. Drawing dimension TO-220 (type STD-ST Single Gauge) Doc ID 2143 Rev 26 Package mechanical data 8174627_B 41/57 ...

  • Page 42

    Package mechanical data Figure 40. Drawing dimension tube for TO-220 Dual Gauge (mm.) Figure 41. Drawing dimension tube for TO-220 Single Gauge (mm.) 42/57 L78xx, L78xxC, L78xxAB, L78xxAC Doc ID 2143 Rev 26 ...

  • Page 43

    L78xx, L78xxC, L78xxAB, L78xxAC Figure 42. Drawing dimension TO-220FP Doc ID 2143 Rev 26 Package mechanical data 7012510A-H 43/57 ...

  • Page 44

    Package mechanical data Table 24. TO-220FP mechanical data Dim. Min. A 4.40 B 2.5 D 2.5 E 0.45 F 0.75 F1 1.15 F2 1.15 G 4.95 G1 2 28.6 L4 9.8 L5 2.9 L6 15.9 L7 ...

  • Page 45

    L78xx, L78xxC, L78xxAB, L78xxAC Figure 43. Drawing dimension TO-3 Table 25. TO-3 mechanical data Dim. Min 0. 3. mm. Typ. Max. Min. 11.85 1.05 1.10 0.037 ...

  • Page 46

    Package mechanical data Figure 44. Drawing dimension DPAK 46/57 L78xx, L78xxC, L78xxAB, L78xxAC Doc ID 2143 Rev 26 0068772-F ...

  • Page 47

    L78xx, L78xxC, L78xxAB, L78xxAC Table 26. DPAK mechanical data Dim. Min. A 2.2 A1 0.9 A2 0.03 B 0.64 b4 5.2 C 0. 4 (L1) L2 ...

  • Page 48

    Package mechanical data Figure 45. Drawing dimension tape and reel for DPAK Table 27. Tape and reel DPAK mechanical data Dim. Min 12 6.80 Bo 10.40 Ko 2.55 Po 3.9 P 7.9 ...

  • Page 49

    L78xx, L78xxC, L78xxAB, L78xxAC Figure 46. Drawing dimension D²PAK (type STD-ST) Doc ID 2143 Rev 26 Package mechanical data 0079457/L 49/57 ...

  • Page 50

    Package mechanical data Figure 47. Drawing dimension D²PAK (type WOOSEOK-Subcon.) 50/57 L78xx, L78xxC, L78xxAB, L78xxAC Doc ID 2143 Rev 26 0079457/L ...

  • Page 51

    L78xx, L78xxC, L78xxAB, L78xxAC Table 28. D²PAK mechanical data Dim. Min. A 4.40 A1 0.03 b 0.70 b2 1.14 c 0.45 c2 1.23 D 8. 2.49 L 2.29 ...

  • Page 52

    Package mechanical data Figure 48. D²PAK footprint recommended data Table 29. D²PAK footprint data Dim 52/57 L78xx, L78xxC, L78xxAB, L78xxAC Values mm. 12.20 9.75 16.90 3.50 1.60 2.54 5.08 Doc ID 2143 Rev ...

  • Page 53

    L78xx, L78xxC, L78xxAB, L78xxAC Table 30. Tape and reel D²PAK mechanical data Dim. Min 12 10.50 Bo 15.70 Ko 4.80 Po 3.9 P 11.9 Figure 49. Drawing dimension tape and reel for ...

  • Page 54

    ... L7805ABD2T-TR L7805ACD2T-TR L7806CD2T-TR L7806ABD2T-TR L7808CD2T-TR L7808ABD2T-TR L7885CD2T-TR L7809CD2T-TR L7809ABD2T-TR L7812CD2T-TR L7812ABD2T-TR L7812ACD2T-TR L7815CD2T-TR L7815ABD2T-TR L7815ACD2T-TR Doc ID 2143 Rev 26 L78xx, L78xxC, L78xxAB, L78xxAC TO-220FP TO-3 L7805T L7805CP L7805CT L7805ABP L7805ACP L7806CT (2) (2) (2) L7885CP L7885CT L7809CP L7812CP L7812CT L7815CP L7815CT Output voltages ...

  • Page 55

    L78xx, L78xxC, L78xxAB, L78xxAC Table 31. Order codes Part numbers TO-220 L7818CV L7818C (1) L7818CV-DG L7824CV L7824C (1) L7824CV-DG L7824AB L7824ABV L7824AC L7824ACV 1. TO-220 Dual Gauge frame. 2. Available on request. Order codes DPAK D²PAK (2) L7818CD2T-TR L7824CD2T-TR Doc ...

  • Page 56

    ... Modified . = 25 °C test condition in ΔV Added Modified title on page 1 . Added: order codes L7805CV-DG, L7806CV-DG, L7808ABV-DG, L7812CV- DG and L7815CV-DG Table 31 on page 54 Added: order codes L7805ACV-DG, L7805ABV-DG, L7806ABV-DG, L7808CV- DG, L7809CV-DG, L7812ACV-DG, L7818CV-DG, L7824CV-DG page 54 . Doc ID 2143 Rev 26 L78xx, L78xxC, L78xxAB, L78xxAC ...

  • Page 57

    ... L78xx, L78xxC, L78xxAB, L78xxAC Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...