L78xx L78xxC Positive voltage regulators Features Output current to 1.5 A Output voltages of 5; 5.2; 6; 8; 8.5; 9; 10; 12; 15; 18; 20; 24 V Thermal overload protection Short circuit protection Output transition SOA protection TO-220FP TO-220 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. Table 1. D2PAK TO-3 Device summary Order codes L7805 L7810C L7805C L7812C L7852C L7815C L7806C L7818C L7808C L7820C L7885C L7824C L7809C August 2007 Rev. 16 1/52 www.st.com 52 L78xx - L78xxC Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 Test circuits 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 6 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 8 Order code 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 2/52 ............................................... 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 L78xx - L78xxC List of figures List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Figure 20. Figure 21. Figure 22. Figure 23. Figure 24. Figure 25. Figure 26. Figure 27. Figure 28. Figure 29. Figure 30. Figure 31. Figure 32. Figure 33. Figure 34. Figure 35. Figure 36. Figure 37. Figure 38. Figure 39. Figure 40. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 DC Parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Load regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Ripple rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Dropout voltage vs junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Peak output current vs input/output differential voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Supply voltage rejection vs frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Output voltage vs junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Output impedance vs frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Quiescent current vs junction temp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Load transient response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Line transient response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Quiescent current vs input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Fixed output regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Current regulator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Circuit for increasing output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Adjustable output regulator (7 to 30 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 0.5 to 10 V Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 High current voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 High output current with short circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Tracking voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Split power supply ( 15 V - 1 A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Negative output voltage circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Switching regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 High input voltage circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 High input voltage circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 High output voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 High input and output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Reducing power dissipation with dropping resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Remote shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Power AM modulator (unity voltage gain, IO 0.5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Adjustable output voltage with temperature compensation . . . . . . . . . . . . . . . . . . . . . . . . 39 Light controllers (VOmin = VXX + VBE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Protection against input short-circuit with high capacitance loads . . . . . . . . . . . . . . . . . . . 40 Drawing dimension D2PAK (type STD-ST). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Drawing dimension D2PAK (type WOOSEOK-SUBCON.) . . . . . . . . . . . . . . . . . . . . . . . . . 46 D2PAK footprint recommended data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 3/52 List of tables L78xx - L78xxC List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Table 12. Table 13. Table 14. Table 15. Table 16. Table 17. Table 18. Table 19. Table 20. Table 21. Table 22. Table 23. Table 24. Table 25. Table 26. Table 27. 4/52 Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Electrical characteristics of L7805 (refer to the test circuits, TJ = -55 to 150C, VI = 10 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . 11 Electrical characteristics of L7806 (refer to the test circuits, TJ = -55 to 150C, VI = 11 V,IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . . 12 Electrical characteristics of L7808 (refer to the test circuits, TJ = -55 to 150C, VI = 14V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . . 13 Electrical characteristics of L7812 (refer to the test circuits, TJ = -55 to 150C, VI = 19 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . 14 Electrical characteristics of L7815 (refer to the test circuits, TJ = -55 to 150C, VI = 23 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . 15 Electrical characteristics of L7818 (refer to the test circuits, TJ = -55 to 150C, VI = 26 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . 16 Electrical characteristics of L7820 (refer to the test circuits, TJ = -55 to 150C, VI = 28 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . 17 Electrical characteristics of L7824 (refer to the test circuits, TJ = -55 to 150C, VI = 33 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . 18 Electrical characteristics of L7805C (refer to the test circuits, TJ = 0 to 150C, VI = 10 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . 19 Electrical characteristics of L7852C (refer to the test circuits, TJ = 0 to 150C, VI = 10 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . 20 Electrical characteristics of L7806C (refer to the test circuits, TJ = 0 to 150C, VI = 11 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . 21 Electrical characteristics of L7808C (refer to the test circuits, TJ = 0 to 150C, VI = 14 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . 22 Electrical characteristics of L7885C (refer to the test circuits, TJ = 0 to 150C, VI = 14.5 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . 23 Electrical characteristics of L7809C (refer to the test circuits, TJ = 0 to 150C, VI = 15 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . 24 Electrical characteristics of L7810C (refer to the test circuits, TJ = 0 to 150C, VI = 15 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . 25 Electrical characteristics of L7812C (refer to the test circuits, TJ = 0 to 150C, VI = 19 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . 26 Electrical characteristics of L7815C (refer to the test circuits, TJ = 0 to 150C, VI = 23 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . 27 Electrical characteristics of L7818C (refer to the test circuits, TJ = 0 to 150C, VI = 26 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . 28 Electrical characteristics of L7820C (refer to the test circuits, TJ = 0 to 150C, VI = 28 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . 29 Electrical characteristics of L7824C (refer to the test circuits, TJ = 0 to 150C, VI = 33 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) . . . . . . . . 30 D2PAK mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Footprint data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 L78xx - L78xxC 1 Diagram Figure 1. Block diagram Diagram 5/52 Pin configuration L78xx - L78xxC 2 Pin configuration Figure 2. Pin connections (top view) TO-220 D2PAK (Any Type) Figure 3. 6/52 Schematic diagram TO220FP TO-3 L78xx - L78xxC Maximum ratings 3 Maximum ratings Table 2. Absolute maximum ratings Symbol Parameter Value for VO= 5 to 18 V 35 for VO= 20, 24 V 40 Unit VI DC Input voltage IO Output current Internally Limited PD Power dissipation Internally Limited TSTG Storage temperature range TOP Operating junction temperature range V -65 to 150 for L7800 C -55 to 150 C for L7800C 0 to 150 Note: Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied Table 3. Thermal data Symbol Parameter RthJC Thermal resistance junction-case RthJA Thermal resistance junction-ambient D2PAK TO-220 TO-220FP TO-3 Unit 3 5 5 4 C/W 62.5 50 60 35 C/W 7/52 Maximum ratings Figure 4. 8/52 Application circuits L78xx - L78xxC L78xx - L78xxC 4 Test circuits Figure 5. DC Parameter Figure 6. Load regulation Test circuits 9/52 Test circuits Figure 7. 10/52 Ripple rejection L78xx - L78xxC L78xx - L78xxC Electrical characteristics 5 Electrical characteristics Table 4. Electrical characteristics of L7805 (refer to the test circuits, TJ = -55 to 150C, VI = 10 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25C 4.8 5 5.2 V VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 8 to 20 V 4.65 5 5.35 V VO(1) VI = 7 to 25 V, TJ = 25C 3 50 Line regulation VI = 8 to 12 V, TJ = 25C 1 25 VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change mV IO = 5 mA to 1.5 A, TJ = 25C 100 IO = 250 to 750 mA, TJ = 25C 25 TJ = 25C 6 mV IO = 5 mA to 1 A 0.5 VI = 8 to 25 V 0.8 mA Output voltage drift IO = 5 mA Output noise voltage B =10 Hz to 100 KHz, TJ = 25C Supply voltage rejection VI = 8 to 18 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 RO Output resistance f = 1 KHz 17 Isc Short circuit current VI = 35 V, TJ = 25C Iscp Short circuit peak current TJ = 25C eN SVR mA 0.6 mV/C 40 68 1.3 V/VO dB 2.5 V m 0.75 1.2 A 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. 11/52 Electrical characteristics Table 5. Symbol L78xx - L78xxC Electrical characteristics of L7806 (refer to the test circuits, TJ = -55 to 150C, VI = 11 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25C 5.75 6 6.25 V VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 9 to 21 V 5.65 6 6.35 V VO(1) Line regulation VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change VI = 8 to 25 V, TJ = 25C 60 VI = 9 to 13 V, TJ = 25C 30 IO = 5 mA to 1.5 A, TJ = 25C 100 IO = 250 to 750 mA, TJ = 25C 30 TJ = 25C 6 mV mV IO = 5 mA to 1 A 0.5 VI = 9 to 25 V 0.8 mA Output voltage drift IO = 5 mA Output noise voltage B =10 Hz to 100 KHz, TJ = 25C Supply voltage rejection VI = 9 to 19 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 RO Output resistance f = 1 KHz 19 Isc Short circuit current VI = 35 V, TJ = 25C Iscp Short circuit peak current TJ = 25C eN SVR mA 0.7 mV/C 40 65 1.3 dB 2.5 V m 0.75 1.2 A 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. 12/52 V/VO L78xx - L78xxC Table 6. Symbol Electrical characteristics Electrical characteristics of L7808 (refer to the test circuits, TJ = -55 to 150C, VI = 14V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25C 7.7 8 8.3 V VO Output voltage IO = 5 mA to 1A, PO 15 W VI = 11.5 to 23 V 7.6 8 8.4 V VO(1) Line regulation VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change VI = 10.5 to 25 V, TJ = 25C 80 VI = 11 to 17 V, TJ = 25C 40 IO = 5 mA to 1.5 A, TJ = 25C 100 IO = 250 to 750 mA, TJ = 25C 40 TJ = 25C 6 mV mV IO = 5 mA to 1 A 0.5 VI = 11.5 to 25 V 0.8 mA Output voltage drift IO = 5 mA Output noise voltage B =10 Hz to 100 KHz, TJ = 25C Supply voltage rejection VI = 11.5 to 21.5 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 RO Output resistance f = 1 KHz 16 Isc Short circuit current VI = 35 V, TJ = 25C Iscp Short circuit peak current TJ = 25C eN SVR mA 1 mV/C 40 62 1.3 V/VO dB 2.5 V m 0.75 1.2 A 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. 13/52 Electrical characteristics Table 7. Symbol L78xx - L78xxC Electrical characteristics of L7812 (refer to the test circuits, TJ = -55 to 150C, VI = 19 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25C 11.5 12 12.5 V VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 15.5 to 27 V 11.4 12 12.6 V VO(1) Line regulation VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change VI = 14.5 to 30 V, TJ = 25C 120 VI = 16 to 22 V, TJ = 25C 60 IO = 5 mA to 1.5 A, TJ = 25C 100 IO = 250 to 750 mA, TJ = 25C 60 TJ = 25C 6 mV mV IO = 5 mA to 1 A 0.5 VI = 15 to 30 V 0.8 mA Output voltage drift IO = 5 mA Output noise voltage B =10 Hz to 100 KHz, TJ = 25C Supply voltage rejection VI = 15 to 25 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 RO Output resistance f = 1 KHz 18 Isc Short circuit current VI = 35 V, TJ = 25C Iscp Short circuit peak current TJ = 25C eN SVR mA 1.5 mV/C 40 61 1.3 dB 2.5 V m 0.75 1.2 A 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. 14/52 V/VO L78xx - L78xxC Table 8. Symbol Electrical characteristics Electrical characteristics of L7815 (refer to the test circuits, TJ = -55 to 150C, VI = 23 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25C 14.4 15 15.6 V VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 18.5 to 30 V 14.25 15 15.75 V VO(1) Line regulation VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change VI = 17.5 to 30 V, TJ = 25C 150 VI = 20 to 26 V, TJ = 25C 75 IO = 5 mA to 1.5 A, TJ = 25C 150 IO = 250 to 750 mA, TJ = 25C 75 TJ = 25C 6 mV mV IO = 5 mA to 1 A 0.5 VI = 18.5 to 30 V 0.8 mA Output voltage drift IO = 5 mA Output noise voltage B =10 Hz to 100 KHz, TJ = 25C Supply voltage rejection VI = 18.5 to 28.5 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 RO Output resistance f = 1 KHz 19 Isc Short circuit current VI = 35 V, TJ = 25C Iscp Short circuit peak current TJ = 25C eN SVR mA 1.8 mV/C 40 60 1.3 V/VO dB 2.5 V m 0.75 1.2 A 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. 15/52 Electrical characteristics Table 9. Symbol L78xx - L78xxC Electrical characteristics of L7818 (refer to the test circuits, TJ = -55 to 150C, VI = 26 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25C 17.3 18 18.7 V VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 22 to 33 V 17.1 18 18.9 V VO(1) Line regulation VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change VI = 21 to 33 V, TJ = 25C 180 VI = 24 to 30 V, TJ = 25C 90 IO = 5 mA to 1.5 A, TJ = 25C 180 IO = 250 to 750 mA, TJ = 25C 90 TJ = 25C 6 mV mV IO = 5 mA to 1 A 0.5 VI = 22 to 33 V 0.8 mA Output voltage drift IO = 5 mA Output noise voltage B =10 Hz to 100 KHz, TJ = 25C Supply voltage rejection VI = 22 to 32 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 RO Output resistance f = 1 KHz 22 Isc Short circuit current VI = 35 V, TJ = 25C Iscp Short circuit peak current TJ = 25C eN SVR mA 2.3 mV/C 40 59 1.3 dB 2.5 V m 0.75 1.2 A 2.2 3.3 A 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 16/52 V/VO L78xx - L78xxC Table 10. Symbol Electrical characteristics Electrical characteristics of L7820 (refer to the test circuits, TJ = -55 to 150C, VI = 28 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions VO Output voltage TJ = 25C VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 24 to 35 V VO(1) Line regulation VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change Min. Typ. Max. Unit 19.2 20 20.8 V 19 20 21 V VI = 22.5 to 35 V, TJ = 25C 200 VI = 26 to 32 V, TJ = 25C 100 IO = 5 mA to 1.5 A, TJ = 25C 200 IO = 250 to 750 mA, TJ = 25C 100 mV mV TJ = 25C 6 IO = 5 mA to 1 A 0.5 VI = 24 to 35 V 0.8 mA Output voltage drift IO = 5 mA Output noise voltage B =10 Hz to 100 KHz, TJ = 25C Supply voltage rejection VI = 24 to 35 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 RO Output resistance f = 1 KHz 24 Isc Short circuit current VI = 35 V, TJ = 25C Iscp Short circuit peak current TJ = 25C eN SVR mA 2.5 mV/C 40 58 1.3 V/VO dB 2.5 V m 0.75 1.2 A 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. 17/52 Electrical characteristics Table 11. Symbol L78xx - L78xxC Electrical characteristics of L7824 (refer to the test circuits, TJ = -55 to 150C, VI = 33 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions VO Output voltage TJ = 25C VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 28 to 38 V VO(1) Line regulation VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change Min. Typ. Max. Unit 23 24 25 V 22.8 24 25.2 V VI = 27 to 38 V, TJ = 25C 240 VI = 30 to 36 V, TJ = 25C 120 IO = 5 mA to 1.5 A, TJ = 25C 240 IO = 250 to 750 mA, TJ = 25C 120 mV mV TJ = 25C 6 IO = 5 mA to 1 A 0.5 VI = 28 to 38 V 0.8 mA Output voltage drift IO = 5 mA Output noise voltage B =10 Hz to 100 KHz, TJ = 25C Supply voltage rejection VI = 28 to 38 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 RO Output resistance f = 1 KHz 28 Isc Short circuit current VI = 35 V, TJ = 25C Iscp Short circuit peak current TJ = 25C eN SVR mA 3 mV/C 40 56 1.3 dB 2.5 V m 0.75 1.2 A 2.2 3.3 A 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 18/52 V/VO L78xx - L78xxC Table 12. Symbol Electrical characteristics Electrical characteristics of L7805C (refer to the test circuits, TJ = 0 to 150C, VI = 10 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25C 4.8 5 5.2 V VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 7 to 20 V 4.75 5 5.25 V VO(1) VI = 7 to 25 V, TJ = 25C 3 100 Line regulation VI = 8 to 12 V, TJ = 25C 1 50 VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change mV IO = 5 mA to 1.5 A, TJ = 25C 100 IO = 250 to 750 mA, TJ = 25C 50 TJ = 25C 8 mV IO = 5 mA to 1 A 0.5 VI = 7 to 25 V 0.8 mA mA Output voltage drift IO = 5 mA Output noise voltage B =10 Hz to 100 KHz, TJ = 25C Supply voltage rejection VI = 8 to 18 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 V RO Output resistance f = 1 KHz 17 m Isc Short circuit current VI = 35 V, TJ = 25C 0.75 A Iscp Short circuit peak current TJ = 25C 2.2 A eN SVR -1.1 mV/C 40 V/VO 62 dB 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 19/52 Electrical characteristics Table 13. Symbol L78xx - L78xxC Electrical characteristics of L7852C (refer to the test circuits, TJ = 0 to 150C, VI = 10 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25C 5.0 5.2 5.4 V VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 8 to 20 V 4.95 5.2 5.45 V VO(1) VI = 7 to 25 V, TJ = 25C 3 105 Line regulation VI = 8 to 12 V, TJ = 25C 1 52 VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change mV IO = 5 mA to 1.5 A, TJ = 25C 105 IO = 250 to 750 mA, TJ = 25C 52 TJ = 25C 8 mV IO = 5 mA to 1 A 0.5 VI = 7 to 25 V 1.3 mA mA Output voltage drift IO = 5 mA -1 mV/C Output noise voltage B =10 Hz to 100 KHz, TJ = 25C 42 V/VO Supply voltage rejection VI = 8 to 18 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 V RO Output resistance f = 1 KHz 17 m Isc Short circuit current VI = 35 V, TJ = 25C 0.75 A Iscp Short circuit peak current TJ = 25C 2.2 A eN SVR 61 dB 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 20/52 L78xx - L78xxC Table 14. Symbol Electrical characteristics Electrical characteristics of L7806C (refer to the test circuits, TJ = 0 to 150C, VI = 11 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25C 5.75 6 6.25 V VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 8 to 21 V 5.7 6 6.3 V VO(1) Line regulation VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change VI = 8 to 25 V, TJ = 25C 120 VI = 9 to 13 V, TJ = 25C 60 IO = 5 mA to 1.5 A, TJ = 25C 120 IO = 250 to 750 mA, TJ = 25C 60 TJ = 25C 8 mV mV IO = 5 mA to 1 A 0.5 VI = 8 to 25 V 1.3 mA mA Output voltage drift IO = 5 mA Output noise voltage B =10 Hz to 100 KHz, TJ = 25C Supply voltage rejection VI = 9 to 19 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 V RO Output resistance f = 1 KHz 19 m Isc Short circuit current VI = 35 V, TJ = 25C 0.55 A Iscp Short circuit peak current TJ = 25C 2.2 A eN SVR -0.8 mV/C 45 V/VO 59 dB 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 21/52 Electrical characteristics Table 15. Symbol L78xx - L78xxC Electrical characteristics of L7808C (refer to the test circuits, TJ = 0 to 150C, VI = 14 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25C 7.7 8 8.3 V VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 10.5 to 25 V 7.6 8 8.4 V VO(1) Line regulation VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change VI = 10.5 to 25 V, TJ = 25C 160 VI = 11 to 17 V, TJ = 25C 80 IO = 5 mA to 1.5 A, TJ = 25C 160 IO = 250 to 750 mA, TJ = 25C 80 TJ = 25C 8 mV mV IO = 5 mA to 1 A 0.5 VI = 10.5 to 25 V 1 mA mA Output voltage drift IO = 5 mA Output noise voltage B =10 Hz to 100 KHz, TJ = 25C Supply voltage rejection VI = 11.5 to 21.5 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 V RO Output resistance f = 1 KHz 16 m Isc Short circuit current VI = 35 V, TJ = 25C 0.45 A Iscp Short circuit peak current TJ = 25C 2.2 A eN SVR -0.8 mV/C 52 V/VO 56 dB 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 22/52 L78xx - L78xxC Table 16. Symbol Electrical characteristics Electrical characteristics of L7885C (refer to the test circuits, TJ = 0 to 150C, VI = 14.5 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25C 8.2 8.5 8.8 V VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 11 to 26 V 8.1 8.5 8.9 V VO(1) Line regulation VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change VI = 11 to 27 V, TJ = 25C 160 VI = 11.5 to 17.5 V, TJ = 25C 80 IO = 5 mA to 1.5 A, TJ = 25C 160 IO = 250 to 750 mA, TJ = 25C 80 TJ = 25C 8 mV mV IO = 5 mA to 1 A mA 0.5 mA VI = 11 to 27 V 1 Output voltage drift IO = 5 mA Output noise voltage B =10 Hz to 100 KHz, TJ = 25C Supply voltage rejection VI = 12 to 22V, f = 120Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 V RO Output resistance f = 1 KHz 16 m Isc Short circuit current VI = 35 V, TJ = 25C 0.45 A Iscp Short circuit peak current TJ = 25C 2.2 A eN SVR -0.8 mV/C 55 V/VO 56 dB 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 23/52 Electrical characteristics Table 17. Symbol L78xx - L78xxC Electrical characteristics of L7809C (refer to the test circuits, TJ = 0 to 150C, VI = 15 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25C 8.64 9 9.36 V VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 11.5 to 26 V 8.55 9 9.45 V VO(1) Line regulation VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change VI = 11.5 to 26 V, TJ = 25C 180 VI = 12 to 18 V, TJ = 25C 90 IO = 5 mA to 1.5 A, TJ = 25C 180 IO = 250 to 750 mA, TJ = 25C 90 TJ = 25C 8 mV mV IO = 5 mA to 1 A 0.5 VI = 11.5 to 26 V 1 mA mA Output voltage drift IO = 5 mA -1 mV/C Output noise voltage B =10 Hz to 100 KHz, TJ = 25C 70 V/VO Supply voltage rejection VI = 12 to 23 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 V RO Output resistance f = 1 KHz 17 m Isc Short circuit current VI = 35 V, TJ = 25C 0.40 A Iscp Short circuit peak current TJ = 25C 2.2 A eN SVR 55 dB 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 24/52 L78xx - L78xxC Table 18. Symbol Electrical characteristics Electrical characteristics of L7810C (refer to the test circuits, TJ = 0 to 150C, VI = 15 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25C 9.6 10 10.4 V VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 12.5 to 26 V 9.5 10 10.5 V VO(1) Line regulation VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change VI = 12.5 to 26 V, TJ = 25C 200 VI = 13.5 to 19 V, TJ = 25C 100 IO = 5 mA to 1.5 A, TJ = 25C 200 IO = 250 to 750 mA, TJ = 25C 100 mV mV TJ = 25C 8 IO = 5 mA to 1 A 0.5 VI = 12.5 to 26 V 1 mA mA Output voltage drift IO = 5 mA -1 mV/C Output noise voltage B =10 Hz to 100 KHz, TJ = 25C 70 V/VO Supply voltage rejection VI = 13 to 23 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 V RO Output resistance f = 1 KHz 17 m Isc Short circuit current VI = 35 V, TJ = 25C 0.40 A Iscp Short circuit peak current TJ = 25C 2.2 A eN SVR 55 dB 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 25/52 Electrical characteristics Table 19. Symbol L78xx - L78xxC Electrical characteristics of L7812C (refer to the test circuits, TJ = 0 to 150C, VI = 19 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25C 11.5 12 12.5 V VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 14.5 to 27 V 11.4 12 12.6 V VO(1) Line regulation VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change VI = 14.5 to 30 V, TJ = 25C 240 VI = 16 to 22 V, TJ = 25C 120 IO = 5 mA to 1.5 A, TJ = 25C 240 IO = 250 to 750 mA, TJ = 25C 120 mV mV TJ = 25C 8 IO = 5 mA to 1 A 0.5 VI = 14.5 to 30 V 1 mA mA Output voltage drift IO = 5 mA -1 mV/C Output noise voltage B =10 Hz to 100 KHz, TJ = 25C 75 V/VO Supply voltage rejection VI = 15 to 25 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 V RO Output resistance f = 1 KHz 18 m Isc Short circuit current VI = 35 V, TJ = 25C 0.35 A Iscp Short circuit peak current TJ = 25C 2.2 A eN SVR 55 dB 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 26/52 L78xx - L78xxC Table 20. Symbol Electrical characteristics Electrical characteristics of L7815C (refer to the test circuits, TJ = 0 to 150C, VI = 23 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25C 14.5 15 15.6 V VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 17.5 to 30 V 14.25 15 15.75 V VO(1) Line regulation VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change VI = 17.5 to 30 V, TJ = 25C 300 VI = 20 to 26 V, TJ = 25C 150 IO = 5 mA to 1.5 A, TJ = 25C 300 IO = 250 to 750 mA, TJ = 25C 150 mV mV TJ = 25C 8 IO = 5 mA to 1A 0.5 VI = 17.5 to 30 V 1 mA mA Output voltage drift IO = 5 mA -1 mV/C Output noise voltage B =10 Hz to 100 KHz, TJ = 25C 90 V/VO Supply voltage rejection VI = 18.5 to 28.5 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 V RO Output resistance f = 1 KHz 19 m Isc Short circuit current VI = 35 V, TJ = 25C 0.23 A Iscp Short circuit peak current TJ = 25C 2.2 A eN SVR 54 dB 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 27/52 Electrical characteristics Table 21. Symbol L78xx - L78xxC Electrical characteristics of L7818C (refer to the test circuits, TJ = 0 to 150C, VI = 26 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25C 17.3 18 18.7 V VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 21 to 33 V 17.1 18 18.9 V VO(1) Line regulation VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change VI = 21 to 33 V, TJ = 25C 360 VI = 24 to 30 V, TJ = 25C 180 IO = 5 mA to 1.5 A, TJ = 25C 360 IO = 250 to 750 mA, TJ = 25C 180 mV mV TJ = 25C 8 IO = 5 mA to 1 A mA 0.5 mA VI = 21 to 33 V 1 Output voltage drift IO = 5 mA Output noise voltage B = 10 Hz to 100 KHz, TJ = 25C Supply voltage rejection VI = 22 to 32 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 V RO Output resistance f = 1 KHz 22 m Isc Short circuit current VI = 35 V, TJ = 25C 0.20 A Iscp Short circuit peak current TJ = 25C 2.1 A eN SVR -1 mV/C 110 V/VO 53 dB 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 28/52 L78xx - L78xxC Table 22. Symbol Electrical characteristics Electrical characteristics of L7820C (refer to the test circuits, TJ = 0 to 150C, VI = 28 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions VO Output voltage TJ = 25C VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 23 to 35 V VO(1) Line regulation VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change Min. Typ. Max. Unit 19.2 20 20.8 V 19 20 21 V VI = 22.5 to 35 V, TJ = 25C 400 VI = 26 to 32 V, TJ = 25C 200 IO = 5 mA to 1.5 A, TJ = 25C 400 IO = 250 to 750 mA, TJ = 25C 200 mV mV TJ = 25C 8 IO = 5 mA to 1 A mA 0.5 mA VI = 23 to 35 V 1 Output voltage drift IO = 5 mA Output noise voltage B =10 Hz to 100 KHz, TJ = 25C Supply voltage rejection VI = 24 to 35 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 V RO Output resistance f = 1 KHz 24 m Isc Short circuit current VI = 35 V, TJ = 25C 0.18 A Iscp Short circuit peak current TJ = 25C 2.1 A eN SVR -1 mV/C 150 V/VO 52 dB 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 29/52 Electrical characteristics Table 23. Symbol L78xx - L78xxC Electrical characteristics of L7824C (refer to the test circuits, TJ = 0 to 150C, VI = 33 V, IO = 500 mA, CI = 0.33 F, CO = 0.1 F unless otherwise specified) Parameter Test conditions VO Output voltage TJ = 25C VO Output voltage IO = 5 mA to 1 A, PO 15 W VI = 27 to 38 V VO(1) Line regulation VO(1) Load regulation Id Id VO/T Quiescent current Quiescent current change Min. Typ. Max. Unit 23 24 25 V 22.8 24 25.2 V VI = 27 to 38 V, TJ = 25C 480 VI = 30 to 36 V, TJ = 25C 240 IO = 5 mA to 1.5 A, TJ = 25C 480 IO = 250 to 750 mA, TJ = 25C 240 mV mV TJ = 25C 8 IO = 5 mA to 1 A mA 0.5 mA VI = 27 to 38 V 1 Output voltage drift IO = 5 mA -1.5 mV/C Output noise voltage B = 10 Hz to 100 KHz, TJ = 25C 170 V/VO Supply voltage rejection VI = 28 to 38 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25C 2 V RO Output resistance f = 1 KHz 28 m Isc Short circuit current VI = 35 V, TJ = 25C 0.15 A Iscp Short circuit peak current TJ = 25C 2.1 A eN SVR 50 dB 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 30/52 L78xx - L78xxC 6 Typical performance Figure 8. Dropout voltage vs junction temperature Typical performance 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. 31/52 Typical performance Figure 14. Load transient response L78xx - L78xxC Figure 15. Line transient response Figure 16. Quiescent current vs input voltage Figure 17. Fixed output regulator 1. To specify an output voltage, substitute voltage value for "XX". 2. Although no output capacitor is need for stability, it does improve transient response. 3. Required if regulator is locate an appreciable distance from power supply filter. 32/52 L78xx - L78xxC Typical performance Figure 18. Current regulator IO = VXX/R1+Id Figure 19. Circuit for increasing output voltage IR1 5 Id VO = VXX(1+R2/R1)+IdR2 Figure 20. Adjustable output regulator (7 to 30V) 33/52 Typical performance Figure 21. 0.5 to 10V Regulator VO=VXXR4/R1 Figure 22. High current voltage regulator VBEQ1 R1 = ______________ IREQ-(IQ1/Q1) VBEQ1 IO = IREG + Q1 (IREG ______) R1 Figure 23. High output current with short circuit protection RSC=VBEQ2/ISC 34/52 L78xx - L78xxC L78xx - L78xxC Typical performance Figure 24. Tracking voltage regulator Figure 25. Split power supply ( 15V - 1 A) * Against potential latch-up problems. 35/52 Typical performance Figure 26. Negative output voltage circuit Figure 27. Switching regulator Figure 28. High input voltage circuit VIN = VI - (VZ + VBE) 36/52 L78xx - L78xxC L78xx - L78xxC Typical performance Figure 29. High input voltage circuit Figure 30. High output voltage regulator Figure 31. High input and output voltage VO = VXX + VZ1 37/52 Typical performance Figure 32. Reducing power dissipation with dropping resistor VI(min)-VXX-VDROP(max) R = ____________________ IO(max)+Id(max) Figure 33. Remote shutdown Figure 34. Power AM modulator (unity voltage gain, IO 0.5) Note: 38/52 The circuit performs well up to 100 KHz. L78xx - L78xxC L78xx - L78xxC Typical performance Figure 35. Adjustable output voltage with temperature compensation VO = VXX (1+R2/R1) + VBE Note: Q2 is connected as a diode in order to compensate the variation of the Q1 VBE with the temperature. C allows a slow rise time of the VO. Figure 36. Light controllers (VOmin = VXX + VBE) VO falls when the light goes up VO rises when the light goes up 39/52 Typical performance L78xx - L78xxC Figure 37. Protection against input short-circuit with high capacitance loads 1. Application with high capacitance loads and an output voltage greater than 6 volts need an external diode (see fig. 32) to protect the device against input short circuit. In this case the input voltage falls rapidly while the output voltage decrease slowly. The capacitance discharges by means of the Base-Emitter junction of the series pass transistor in the regulator. If the energy is sufficiently high, the transistor may be destroyed. The external diode by-passes the current from the IC to ground. 40/52 L78xx - L78xxC 7 Package mechanical data Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK(R) 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. 41/52 Package mechanical data L78xx - L78xxC TO-3 mechanical data mm. Dim. Min. A inch. Typ. Max. Min. Typ. 11.85 B 0.96 Max. 0.466 1.05 1.10 0.037 0.041 0.043 C 1.70 0.066 D 8.7 0.342 E 20.0 0.787 G 10.9 0.429 N 16.9 0.665 P 26.2 R 3.88 1.031 4.09 U 0.152 39.5 V 1.555 30.10 1.185 A P D C O N B V E G U 0.161 R P003C/C 42/52 L78xx - L78xxC Package mechanical data TO-220 (A type) mechanical data Dim. mm. Min. Typ. inch. Max. Min. Typ. Max. A 4.40 4.60 0.173 0.181 b 0.61 0.88 0.024 0.035 b1 1.15 1.70 0.045 0.067 c 0.49 0.70 0.019 0.028 D 15.25 15.75 0.600 0.620 E 10.0 10.40 0.394 0.409 e 2.4 2.7 0.094 0.106 e1 4.95 5.15 0.195 0.203 F 1.23 1.32 0.048 0.052 H1 6.2 6.6 0.244 0.260 J1 2.40 2.72 0.094 0.107 L 13.0 14.0 0.512 0.551 L1 3.5 3.93 0.138 0.155 L20 16.4 0.646 L30 28.9 1.138 P 3.75 3.85 0.148 0.152 Q 2.65 2.95 0.104 0.116 0015988/N 43/52 Package mechanical data L78xx - L78xxC TO-220FP mechanical data Dim. mm. Min. A 4.40 Typ inch. Max. Min. Typ. Max. 4.60 0.173 0.181 B 2.5 2.7 0.098 0.106 D 2.5 2.75 0.098 0.108 E 0.45 0.70 0.017 0.027 F 0.75 1 0.030 0.039 F1 1.15 1.50 0.045 0.059 F2 1.15 1.50 0.045 0.059 G 4.95 5.2 0.194 0.204 G1 2.4 2.7 0.094 0.106 H 10.0 10.40 0.393 0.409 L2 L3 16 0.630 28.6 30.6 1.126 1.204 L4 9.8 10.6 0.385 0.417 L5 2.9 3.6 0.114 0.142 L6 15.9 16.4 0.626 0.645 L7 9 9.3 0.354 0.366 DIA. 3 3.2 0.118 0.126 7012510A-H 44/52 L78xx - L78xxC Package mechanical data Figure 38. Drawing dimension D2PAK (type STD-ST) 0079457/L 45/52 Package mechanical data L78xx - L78xxC Figure 39. Drawing dimension D2PAK (type WOOSEOK-SUBCON.) 0079457/L 46/52 L78xx - L78xxC Table 24. Package mechanical data D2PAK mechanical data DIM. MIN. TYPE WOOSEOK-SUBCON. mm. mm. 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 E 10 E1 8.50 e 7.50 10.40 9.80 10.20 7.50 2.54 2.54 e1 4.88 5.28 H 15 15.85 15 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 V2 Note: TYPE STD-ST 5.08 0.4 0 15.30 15.60 0.30 8 0 3 The D2PAK package coming from the subcontractor Wooseok is fully compatible with the ST's package suggested footprint. 47/52 Package mechanical data L78xx - L78xxC Figure 40. D2PAK footprint recommended data Table 25. Footprint data VALUES 48/52 mm. inch. A 12.20 0.480 B 9.75 0.384 C 16.90 0.665 D 3.50 0.138 E 1.60 0.063 F 2.54 0.100 G 5.08 0.200 L78xx - L78xxC Package mechanical data Tape & reel D2PAK-P2PAK-D2PAK/A-P2PAK/A mechanical data mm. inch. Dim. Min. Typ. A Max. Min. Typ. 180 13.0 7.086 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 Max. 0.504 0.512 14.4 0.519 0.567 Ao 10.50 10.6 10.70 0.413 0.417 0.421 Bo 15.70 15.80 15.90 0.618 0.622 0.626 Ko 4.80 4.90 5.00 0.189 0.193 0.197 Po 3.9 4.0 4.1 0.153 0.157 0.161 P 11.9 12.0 12.1 0.468 0.472 0.476 49/52 Order code L78xx - L78xxC 8 Order code Table 26. Order code Packaging Part numbers TO-220 (A Type) D2PAK TO-220FP L7805 TO-3 L7805T L7805C L7805CV L7805CD2T-TR L7805CP L7805CT L7852C L7852CV L7852CD2T-TR(1) L7852CP(1) L7852CT(1) L7806C L7806CV L7806CD2T-TR L7808C L7808CV L7808CD2T-TR L7885C L7885CV L7809C L7809CV (1) L7885CD2T-TR L7809CD2T-TR L7806CT L7808CP L7885CP (1) L7808CT L7885CT(1) L7809CP L7809CT (1) L7810C L7810CV L7812C L7812CV L7812CD2T-TR L7812CP L7812CT L7815C L7815CV L7815CD2T-TR L7815CP L7815CT L7818C L7818CV L7818CD2T-TR(1) L7820C L7820CV L7820CD2T-TR(1) L7820CP(1) L7820CT(1) L7824C L7824CV L7824CD2T-TR L7824CP L7824CT 1. Available on request. 50/52 L7810CD2T-TR L7818CT L78xx - L78xxC Revision history 9 Revision history Table 27. Revision history Date Revision Changes 21-Jun-2004 12 Document updating. 03-Aug-2006 13 Order codes has been updated and new template. 19-Jan-2007 14 D2PAK mechanical data has been updated and add footprint data. 31-May-2007 15 Order codes has been updated. 29-Aug-2007 16 Added Table 1. in cover page. 51/52 L78xx - L78xxC Please Read Carefully: 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. 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