L78SXX_10

L78Sxx L78SxxC 2 A positive voltage regulators Features ■ ■ ■ ■ ■ Output current to 2 A Output voltages of 5; 7.5; 9; 10; 12; 15; 18; 24 V Thermal overload protection Short circuit protection Output transition SOA protection Description The L78Sxx series of three-terminal positive regulators is available in TO-220 and TO-3 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 shutdown and safe area protection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 2 A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents. TO-220 TO-3 Table 1. Device summary Part numbers L78S05 L78S05C L78S75 L78S75C L78S09 L78S09C L78S10 L78S10C L78S12 L78S12C L78S15 L78S15C L78S18 L78S18C L78S24 L78S24C March 2010 Doc ID 2148 Rev 4 1/39 www.st.com 39 Contents L78Sxx, L78SxxC Contents 1 2 3 4 5 6 7 8 9 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 2/39 Doc ID 2148 Rev 4 L78Sxx, L78SxxC List of tables 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. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Electrical characteristics of L78S05 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Electrical characteristics of L78S75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Electrical characteristics of L78S09 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Electrical characteristics of L78S10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Electrical characteristics of L78S12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Electrical characteristics of L78S15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Electrical characteristics of L78S18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Electrical characteristics of L78S24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Electrical characteristics of L78S05C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Electrical characteristics of L78S75C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Electrical characteristics of L78S09C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Electrical characteristics of L78S10C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Electrical characteristics of L78S12C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Electrical characteristics of L78S15C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Electrical characteristics of L78S18C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Electrical characteristics of L78S24C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 TO-220 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Doc ID 2148 Rev 4 3/39 List of figures L78Sxx, L78SxxC 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. Figure 41. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 DC parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Load regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Ripple rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Dropout voltage vs. junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Peak output current vs. input/output differential voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Output impedance vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Output voltage vs. junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Quiescent current vs. junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Load transient response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Line transient response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Quiescent current vs. input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Fixed output regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Constant current regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Circuit for increasing output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Adjustable output regulator (7 to 30 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 0.5 to 10 V regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 High current voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 High output current with short circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Tracking voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Positive and negative regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Negative output voltage circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Switching regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 High input voltage circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 High input voltage circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 High output voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 High input and output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Reducing power dissipation with dropping resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Remote shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Power AM modulator (unity voltage gain, IO ≤ 1 A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Adjustable output voltage with temperature compensation . . . . . . . . . . . . . . . . . . . . . . . . 30 Light controllers (VOmin = VXX + VBE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Protection against input short-circuit with high capacitance loads . . . . . . . . . . . . . . . . . . . 31 Drawing dimension TO-220 (type STD-ST Dual Gauge) . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Drawing dimension TO-220 (type STD-ST Single Gauge) . . . . . . . . . . . . . . . . . . . . . . . . . 34 Drawing dimension tube for TO-220 Dual Gauge (mm.) . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Drawing dimension tube for TO-220 Single Gauge (mm.) . . . . . . . . . . . . . . . . . . . . . . . . . 35 4/39 Doc ID 2148 Rev 4 L78Sxx, L78SxxC Diagram 1 Figure 1. Diagram Block diagram Doc ID 2148 Rev 4 5/39 Pin configuration L78Sxx, L78SxxC 2 Figure 2. Pin configuration Pin connections (top view) TO-220 TO-3 Figure 3. Schematic diagram 6/39 Doc ID 2148 Rev 4 L78Sxx, L78SxxC Maximum ratings 3 Table 2. Symbol VI IO PD TSTG TOP Maximum ratings Absolute maximum ratings Parameter DC input voltage Output current Power dissipation Storage temperature range for L78Sxx Operating junction temperature range for L78SxxC 0 to 150 for VO= 5 to 18V for VO= 24V Value 35 V 40 Internally limited Internally limited -65 to 150 -55 to 150 °C °C Unit Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Thermal data Parameter Thermal resistance junction-case Thermal resistance junction-ambient TO-220 5 50 TO-3 4 35 Unit °C/W °C/W Table 3. Symbol RthJC RthJA Figure 4. Application circuits Doc ID 2148 Rev 4 7/39 Test circuits L78Sxx, L78SxxC 4 Figure 5. Test circuits DC parameter Figure 6. Load regulation Figure 7. Ripple rejection 8/39 Doc ID 2148 Rev 4 L78Sxx, L78SxxC Electrical characteristics 5 Electrical characteristics Refer to the test circuits, TJ = 25 °C, VI = 10 V, IO = 500 mA, unless otherwise specified. Table 4. Symbol VO VO ΔVO ΔVO IQ ΔIQ ΔVO/ΔT eN SVR VI RO Isc Iscp Electrical characteristics of L78S05 Parameter Output voltage Output voltage Line regulation Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Operating input voltage Output resistance Short circuit current Short circuit peak current IO = 20 mA to 1 A VI = 7 to 25 V, IO = 20 mA IO = 5 mA, TJ = -55 °C to 150 °C B =10 Hz to 100 kHz f = 120 Hz IO ≤ 1 A f = 1 kHz VI = 27 V 60 8 17 500 3 -1.1 40 IO = 1 A, VI = 7 V VI = 7 to 25 V VI = 8 to 25 V IO = 20 mA to 2 A Test conditions Min. 4.8 4.75 Typ. 5 5 Max. 5.2 5.25 100 mV 50 100 8 0.5 mA 1.3 mV/°C µV dB V mΩ mA A mV mA Unit V V Doc ID 2148 Rev 4 9/39 Electrical characteristics L78Sxx, L78SxxC Refer to the test circuits, TJ = 25 °C, VI = 12.5 V, IO = 500 mA, unless otherwise specified. Table 5. Symbol VO VO ΔVO ΔVO IQ ΔIQ ΔVO/ΔT eN SVR VI RO Isc Iscp Electrical characteristics of L78S75 Parameter Output voltage Output voltage Line regulation Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Operating input voltage Output resistance Short circuit current Short circuit peak current IO = 20 mA to 1 A IO = 20 mA, VI = 9.5 to 25 V IO = 5 mA, TJ = -55 °C to 150 °C B =10 Hz to 100 kHz f = 120 Hz IO ≤ 1.5 A f = 1 kHz VI = 27 V 54 10.5 16 500 3 -0.8 52 IO = 1 A, VI = 9.5 V VI = 9.5 to 25 V VI = 10.5 to 20 V IO = 20 mA to 2 A Test conditions Min. 7.15 7.1 Typ. 7.5 7.5 Max. 7.9 7.95 120 mV 60 120 8 0.5 mA 1.3 mV/°C µV dB V mΩ mA A mV mA Unit V V Refer to the test circuits, TJ = 25 °C, VI = 14 V, IO = 500 mA, unless otherwise specified. Table 6. Symbol VO VO ΔVO ΔVO IQ ΔIQ ΔVO/ΔT eN SVR VI RO Isc Iscp 10/39 Electrical characteristics of L78S09 Parameter Output voltage Output voltage Line regulation Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Operating input voltage Output resistance Short circuit current Short circuit peak current Doc ID 2148 Rev 4 IO = 20mA to 1A VI = 11 to 25 V, IO = 20 mA IO = 5 mA, TJ = -55 °C to 150 °C B =10 Hz to 100 kHz f = 120 Hz IO ≤ 1.5 A f = 1 kHz VI = 27 V 53 12 17 500 3 -1 60 IO = 1 A, VI = 11 V VI = 11 to 25 V VI = 11 to 20 V IO = 20 mA to 2 A Test conditions Min. 8.65 8.6 Typ. 9 9 Max. 9.35 9.4 130 mV 65 130 8 0.5 mA 1.3 mV/°C µV dB V mΩ mA A mV mA Unit V V L78Sxx, L78SxxC Electrical characteristics Refer to the test circuits, TJ = 25 °C, VI = 15 V, IO = 500 mA, unless otherwise specified. Table 7. Symbol VO VO ΔVO ΔVO IQ ΔIQ ΔVO/ΔT eN SVR VI RO Isc Iscp Electrical characteristics of L78S10 Parameter Output voltage Output voltage Line regulation Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Operating input voltage Output resistance Short circuit current Short circuit peak current IO = 20 mA to 1A VI = 12.5 to 30 V, IO = 20 mA IO = 5 mA, TJ = -55 °C to 150 °C B =10 Hz to 100 kHz f = 120 Hz IO ≤ 1.5 A f = 1 kHz VI = 27 V 53 13 17 500 3 -1 65 IO = 1 A, VI = 12.5 V VI = 12.5 to 30 V VI = 14 to 22 V IO = 20 mA to 2 A Test conditions Min. 9.5 9.4 Typ. 10 10 Max. 10.5 10.6 200 mV 100 150 8 0.5 mA 1 mV/°C µV dB V mΩ mA A mV mA Unit V V Refer to the test circuits, TJ = 25 °C, VI = 19 V, IO = 500 mA, unless otherwise specified. Table 8. Symbol VO VO ΔVO ΔVO IQ ΔIQ ΔVO/ΔT eN SVR VI RO Isc Iscp Electrical characteristics of L78S12 Parameter Output voltage Output voltage Line regulation Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Operating input voltage Output resistance Short circuit current Short circuit peak current Doc ID 2148 Rev 4 IO = 20 mA to 1 A VI = 14.5 to 30 V, IO = 20 mA IO = 5 mA, TJ = -55 °C to 150 °C B =10 Hz to 100 kHz f = 120 Hz IO ≤ 1.5 A f = 1 kHz VI = 27 V 53 15 18 500 3 -1 75 IO = 1 A, VI = 14.5 V VI = 14.5 to 30 V VI = 16 to 22 V IO = 20 mA to 2 A Test conditions Min. 11.5 11.4 Typ. 12 12 Max. 12.5 12.6 240 mV 120 160 8 0.5 mA 1 mV/°C µV dB V mΩ mA A 11/39 mV mA Unit V V Electrical characteristics L78Sxx, L78SxxC Refer to the test circuits, TJ = 25 °C, VI = 23 V, IO = 500 mA, unless otherwise specified. Table 9. Symbol VO VO ΔVO ΔVO IQ ΔIQ ΔVO/ΔT eN SVR VI RO Isc Iscp Electrical characteristics of L78S15 Parameter Output voltage Output voltage Line regulation Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Operating input voltage Output resistance Short circuit current Short circuit peak current IO = 20 mA to 1 A VI = 17.5 to 30 V, IO = 20 mA IO = 5 mA, TJ = -55 °C to 150 °C B =10 Hz to 100 kHz f = 120 Hz IO ≤ 1.5 A f = 1 kHz VI = 27 V 52 18 19 500 3 -1 90 IO = 1 A, VI = 17.5 V VI = 17.5 to 30 V VI = 20 to 26 V IO = 20 mA to 2 A Test conditions Min. 14.4 14.25 Typ. 15 15 Max. 15.6 15.75 300 mV 150 180 8 0.5 mA 1 mV/°C µV dB V mΩ mA A mV mA Unit V V Refer to the test circuits, TJ = 25 °C, VI = 26 V, IO = 500 mA, unless otherwise specified. Table 10. Symbol VO VO ΔVO ΔVO IQ ΔIQ ΔVO/ΔT eN SVR VI RO Isc Iscp 12/39 Electrical characteristics of L78S18 Parameter Output voltage Output voltage Line regulation Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Operating input voltage Output resistance Short circuit current Short circuit peak current Doc ID 2148 Rev 4 IO = 20 mA to 1 A VI = 20.5 to 30 V, IO = 20 mA IO = 5 mA, TJ = -55 °C to 150 °C B =10 Hz to 100 kHz f = 120 Hz IO ≤ 1.5 A f = 1 kHz VI = 27 V 49 21 22 500 3 -1 110 IO = 1 A, VI = 20.5 V VI = 20.5 to 30 V VI = 22 to 28 V IO = 20 mA to 2 A Test conditions Min. 17.1 17 Typ. 18 18 Max. 18.9 19 360 mV 180 200 8 0.5 mA 1 mV/°C µV dB V mΩ mA A mV mA Unit V V L78Sxx, L78SxxC Electrical characteristics Refer to the test circuits, TJ = 25 °C, VI = 33 V, IO = 500 mA, unless otherwise specified. Table 11. Symbol VO VO ΔVO ΔVO IQ ΔIQ ΔVO/ΔT eN SVR VI RO Isc Iscp Electrical characteristics of L78S24 Parameter Output voltage Output voltage Line regulation Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Operating input voltage Output resistance Short circuit current Short circuit peak current IO = 20 mA to 1 A VI = 27 to 38 V, IO = 20 mA IO = 5 mA, TJ = -55 °C to 150 °C B =10 Hz to 100 kHz f = 120 Hz IO ≤ 1.5 A f = 1 kHz VI = 27 V 48 27 23 500 3 -1.5 170 IO = 1 A, VI = 27 V VI = 27 to 38 V VI = 30 to 36 V IO = 20 mA to 2 A Test conditions Min. 23 22.8 Typ. 24 24 Max. 25 25.2 480 mV 240 250 8 0.5 mA 1 mV/°C µV dB V mΩ mA A mV mA Unit V V Doc ID 2148 Rev 4 13/39 Electrical characteristics L78Sxx, L78SxxC Refer to the test circuits, TJ = 25 °C, VI = 10 V, IO = 500 mA, unless otherwise specified. Table 12. Symbol VO VO ΔVO ΔVO IQ ΔIQ ΔVO/ΔT eN SVR VI RO Isc Iscp Electrical characteristics of L78S05C Parameter Output voltage Output voltage Line regulation IO = 1 A, VI = 7 V VI = 7 to 25 V VI = 8 to 25 V Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Operating input voltage Output resistance Short circuit current Short circuit peak current IO = 20 mA to 1 A VI = 7 to 25 V, IO = 20 mA IO = 5 mA, TJ = 0 °C to 70 °C B = 10 Hz to 100 kHz f = 120 Hz IO ≤ 1 A f = 1 kHz VI = 27 V 54 8 17 500 3 -1.1 40 IO = 20 mA to 1.5 A IO = 2 A 80 8 0.5 mA 1.3 mV/°C µV dB V mΩ mA A mA Test conditions Min. 4.8 4.75 Typ. 5 5 Max. 5.2 5.25 100 mV 50 100 mV Unit V V 14/39 Doc ID 2148 Rev 4 L78Sxx, L78SxxC Electrical characteristics Refer to the test circuits, TJ = 25 °C, VI = 12.5 V, IO = 500 mA, unless otherwise specified. Table 13. Symbol VO VO ΔVO ΔVO IQ ΔIQ ΔVO/ΔT eN SVR VI RO Isc Iscp Electrical characteristics of L78S75C Parameter Output voltage Output voltage Line regulation IO = 1 A, VI = 9.5 V VI = 9.5 to 25 V VI = 10.5 to 20 V Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Operating input voltage Output resistance Short circuit current Short circuit peak current IO = 20 mA to 1 A VI = 9.5 to 25 V, IO = 20 mA IO = 5 mA, TJ = 0 °C to 70 °C B = 10 Hz to 100 kHz f = 120 Hz IO ≤ 1 A f = 1 kHz VI = 27 V 48 10.5 16 500 3 -0.8 52 IO = 20 mA to 1.5 A IO = 2 A 100 8 0.5 mA 1.3 mV/°C µV dB V mΩ mA A mA Test conditions Min. 7.15 7.1 Typ. 7.5 7.5 Max. 7.9 7.95 120 mV 60 140 mV Unit V V Doc ID 2148 Rev 4 15/39 Electrical characteristics L78Sxx, L78SxxC Refer to the test circuits, TJ = 25 °C, VI = 14 V, IO = 500 mA, unless otherwise specified. Table 14. Symbol VO VO ΔVO ΔVO IQ ΔIQ ΔVO/ΔT eN SVR VI RO Isc Iscp Electrical characteristics of L78S09C Parameter Output voltage Output voltage Line regulation IO = 1 A, VI = 11 V VI = 11 to 25 V VI = 11 to 20 V Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Operating input voltage Output resistance Short circuit current Short circuit peak current IO = 20 mA to 1 A VI = 11 to 25 V, IO = 20 mA IO = 5 mA, TJ = 0 °C to 70 °C B = 10 Hz to 100 kHz f = 120 Hz IO ≤ 1 A f = 1 kHz VI = 27 V 47 12 17 500 3 -1 60 IO = 20 mA to 1.5 A IO = 2 A 100 8 0.5 mA 1.3 mV/°C µV dB V mΩ mA A mA Test conditions Min. 8.65 8.6 Typ. 9 9 Max. 9.35 9.4 130 mV 65 170 mV Unit V V 16/39 Doc ID 2148 Rev 4 L78Sxx, L78SxxC Electrical characteristics Refer to the test circuits, TJ = 25 °C, VI = 15 V, IO = 500 mA, unless otherwise specified. Table 15. Symbol VO VO ΔVO ΔVO IQ ΔIQ ΔVO/ΔT eN SVR VI RO Isc Iscp Electrical characteristics of L78S10C Parameter Output voltage Output voltage Line regulation IO = 1 A, VI = 12.5 V VI = 12.5 to 30 V VI = 14 to 22 V Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Operating input voltage Output resistance Short circuit current Short circuit peak current IO = 20 mA to 1 A VI = 12.5 to 30 V, IO = 20 mA IO = 5 mA, TJ = 0 °C to 70 °C B = 10 Hz to 100 kHz f = 120 Hz IO ≤ 1 A f = 1 kHz VI = 27 V 47 13 17 500 3 -1 65 IO = 20 mA to 1.5 A IO = 2 A 150 8 0.5 mA 1 mV/°C µV dB V mΩ mA A mA Test conditions Min. 9.5 9.4 Typ. 10 10 Max. 10.5 10.6 200 mV 100 240 mV Unit V V Doc ID 2148 Rev 4 17/39 Electrical characteristics L78Sxx, L78SxxC Refer to the test circuits, TJ = 25 °C, VI = 19 V, IO = 500 mA, unless otherwise specified. Table 16. Symbol VO VO ΔVO ΔVO IQ ΔIQ ΔVO/ΔT eN SVR VI RO Isc Iscp Electrical characteristics of L78S12C Parameter Output voltage Output voltage Line regulation IO = 1 A, VI = 14.5 V VI = 14.5 to 30 V VI = 16 to 22 V Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Operating input voltage Output resistance Short circuit current Short circuit peak current IO = 20 mA to 1 A VI = 14.5 to 30 V, IO = 20 mA IO = 5 mA, TJ = 0 °C to 70 °C B =10 Hz to 100 kHz f = 120 Hz IO ≤ 1 A f = 1 kHz VI = 27 V 47 15 18 500 3 -1 75 IO = 20 mA to 1.5 A IO = 2 A 150 8 0.5 mA 1 mV/°C µV dB V mΩ mA A mA Test conditions Min. 11.5 11.4 Typ. 12 12 Max. 12.5 12.6 240 mV 120 240 mV Unit V V 18/39 Doc ID 2148 Rev 4 L78Sxx, L78SxxC Electrical characteristics Refer to the test circuits, TJ = 25 °C, VI = 23 V, IO = 500 mA, unless otherwise specified. Table 17. Symbol VO VO ΔVO ΔVO IQ ΔIQ ΔVO/ΔT eN SVR VI RO Isc Iscp Electrical characteristics of L78S15C Parameter Output voltage Output voltage Line regulation IO = 1 A, VI = 17.5 V VI = 17.5 to 30 V VI = 20 to 26 V Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Operating input voltage Output resistance Short circuit current Short circuit peak current IO = 20 mA to 1 A VI = 17.5 to 30 V, IO = 20 mA IO = 5 mA, TJ = 0 °C to 70 °C B =10 Hz to 100 kHz f = 120 Hz IO ≤ 1 A f = 1 kHz VI = 27 V 46 18 19 500 3 -1 90 IO = 20 mA to 1.5 A IO = 2 A 150 8 0.5 mA 1 mV/°C µV dB V mΩ mA A mA Test conditions Min. 14.4 14.25 Typ. 15 15 Max. 15.6 15.75 300 mV 150 300 mV Unit V V Doc ID 2148 Rev 4 19/39 Electrical characteristics L78Sxx, L78SxxC Refer to the test circuits, TJ = 25 °C, VI = 26 V, IO = 500 mA, unless otherwise specified. Table 18. Symbol VO VO ΔVO ΔVO IQ ΔIQ ΔVO/ΔT eN SVR VI RO Isc Iscp Electrical characteristics of L78S18C Parameter Output voltage Output voltage Line regulation IO = 1 A, VI = 20.5 V VI = 20.5 to 30 V VI = 22 to 28 V Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Operating input voltage Output resistance Short circuit current Short circuit peak current IO = 20 mA to 1 A VI = 20.5 to 30 V, IO = 20 mA IO = 5 mA, TJ = 0 °C to 70 °C B =10 Hz to 100 kHz f = 120 Hz IO ≤ 1 A f = 1 kHz VI = 27 V 43 21 22 500 3 -1 110 IO = 20 mA to 1.5 A IO = 2 A 200 8 0.5 mA 1 mV/°C µV dB V mΩ mA A mA Test conditions Min. 17.1 17 Typ. 18 18 Max. 18.9 19 360 mV 180 360 mV Unit V V 20/39 Doc ID 2148 Rev 4 L78Sxx, L78SxxC Electrical characteristics Refer to the test circuits, TJ = 25 °C, VI = 33 V, IO = 500 mA, unless otherwise specified. Table 19. Symbol VO VO ΔVO ΔVO IQ ΔIQ ΔVO/ΔT eN SVR VI RO Isc Iscp Electrical characteristics of L78S24C Parameter Output voltage Output voltage Line regulation IO = 1 A, VI = 27 V VI = 27 to 38 V VI = 30 to 36 V Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Operating input voltage Output resistance Short circuit current Short circuit peak current IO = 20 mA to 1 A VI = 27 to 38 V, IO = 20 mA IO = 5 mA, TJ = 0 °C to 70 °C B = 10 Hz to 100 kHz f = 120 Hz IO ≤ 1 A f = 1 kHz VI = 27 V 42 27 28 500 3 -1.5 170 IO = 20 mA to 1.5 A IO = 2 A 300 8 0.5 mA 1 mV/°C µV dB V mΩ mA A mA Test conditions Min. 23 22.8 Typ. 24 24 Max. 25 25.2 480 mV 240 480 mV Unit V V Doc ID 2148 Rev 4 21/39 Typical performance L78Sxx, L78SxxC 6 Figure 8. Typical performance Dropout voltage vs. junction temperature Figure 9. Peak output current vs. input/output differential voltage Figure 10. Output impedance vs. frequency Figure 11. Output voltage vs. junction temperature Figure 12. Supply voltage rejection vs. frequency Figure 13. Quiescent current vs. junction temperature 22/39 Doc ID 2148 Rev 4 L78Sxx, L78SxxC Typical performance Figure 14. Load transient response Figure 15. Line transient response Figure 16. Quiescent current vs. input voltage Figure 17. Fixed output regulator 1. To specify an output voltage, substitute voltage value for "XX". 2. Although no output capacitor is need for stability, it does improve transient response. 3. Required if regulator is locate an appreciable distance from power supply filter. Doc ID 2148 Rev 4 23/39 Typical performance L78Sxx, L78SxxC Figure 18. Constant 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 30 V) 24/39 Doc ID 2148 Rev 4 L78Sxx, L78SxxC Typical performance Figure 21. 0.5 to 10 V regulator VO=VXXR4/R1 Figure 22. High current voltage regulator VBEQ1 R1 = ______________ IREQ-(IQ1/bQ1) VBEQ1 IO = IREG + Q1 (IREG ______) R1 Figure 23. High output current with short circuit protection RSC=VBEQ2/ISC Doc ID 2148 Rev 4 25/39 Typical performance L78Sxx, L78SxxC Figure 24. Tracking voltage regulator Figure 25. Positive and negative regulator 26/39 Doc ID 2148 Rev 4 L78Sxx, L78SxxC Typical performance Figure 26. Negative output voltage circuit Figure 27. Switching regulator Figure 28. High input voltage circuit VIN = VI - (VZ + VBE) Doc ID 2148 Rev 4 27/39 Typical performance L78Sxx, L78SxxC Figure 29. High input voltage circuit Figure 30. High output voltage regulator Figure 31. High input and output voltage VO = VXX + VZ1 28/39 Doc ID 2148 Rev 4 L78Sxx, L78SxxC 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 ≤ 1 A) Note: The circuit performs well up to 100 kHz. Doc ID 2148 Rev 4 29/39 Typical performance L78Sxx, L78SxxC 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 30/39 Doc ID 2148 Rev 4 L78Sxx, L78SxxC Typical performance 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 Figure 30 on page 28) 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 BaseEmitter 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. Doc ID 2148 Rev 4 31/39 Package mechanical data L78Sxx, L78SxxC 7 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 available at: www.st.com. ECOPACK® is an ST trademark. Table 20. TO-220 mechanical data Type STD - ST Dual Gauge Type STD - ST Single Gauge mm. Max. 4.60 0.88 1.70 0.70 15.75 1.27 10.00 2.40 4.95 1.23 6.20 2.40 13.00 3.50 16.40 28.90 3.75 2.65 3.85 2.95 3.75 2.65 10.40 2.70 5.15 1.32 6.60 2.72 14.00 3.93 10.00 2.40 4.95 0.51 6.20 2.40 13.00 3.50 16.40 28.90 3.85 2.95 10.40 2.70 5.15 0.60 6.60 2.72 14.00 3.93 Min. 4.40 0.61 1.14 0.48 15.25 Typ. Max. 4.60 0.88 1.70 0.70 15.75 Dim. Min. A b b1 c D D1 E e e1 F H1 J1 L L1 L20 L30 ∅P Q 4.40 0.61 1.14 0.48 15.25 mm. Typ. In spite of some difference in tolerances, the packages are compatible. 32/39 Doc ID 2148 Rev 4 L78Sxx, L78SxxC Package mechanical data Figure 38. Drawing dimension TO-220 (type STD-ST Dual Gauge) 0015988_S Note: 1 2 Maximum resin gate protrusion: 0.5 mm. Resin gate position is accepted in each of the two positions shown on the drawing, or their symmetrical. Doc ID 2148 Rev 4 33/39 Package mechanical data L78Sxx, L78SxxC Figure 39. Drawing dimension TO-220 (type STD-ST Single Gauge) 8174627_B 34/39 Doc ID 2148 Rev 4 L78Sxx, L78SxxC 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.) Doc ID 2148 Rev 4 35/39 Package mechanical data L78Sxx, L78SxxC TO-3 mechanical data Dim. A B C D E G N P R U V 30.10 3.88 10.9 16.9 26.2 4.09 39.5 1.185 0.152 0.96 mm. Min. Typ. 11.85 1.05 1.10 1.70 8.7 20.0 0.429 0.665 1.031 0.161 1.555 0.037 Max. Min. inch. Typ. 0.466 0.041 0.043 0.066 0.342 0.787 Max. P G A D C U V O N R P003C/C 36/39 Doc ID 2148 Rev 4 B E L78Sxx, L78SxxC Order codes 8 Table 21. Order codes Order codes Packages Part numbers TO-220 L78S05 L78S05C L78S75 L78S75C L78S09 L78S09C L78S10 L78S10C L78S12 L78S12C L78S15 L78S15C L78S18 L78S18C L78S24 L78S24C L78S24CV L78S18CV L78S24T (1) (1) Output voltage T0-3 L78S05T (1) L78S05CV L78S05CT L78S75T L78S75CV (1) 5V 5V 7.5 V 7.5 V 9V 9V (1) (1) L78S75CT L78S09T (1) L78S09CV L78S10T L78S10CV (1) (1) 10 V 10 V 12 V 12 V 15 V 15 V L78S10CT L78S12T (1) L78S12CV L78S12CT L78S15T L78S15CV L78S18T (1) (1) 18 V 18 V 24 V 24 V L78S24CT 1. Available on request. Doc ID 2148 Rev 4 37/39 Revision history L78Sxx, L78SxxC 9 Table 22. Date Revision history Document revision history Revision 2 3 4 Order codes updated. Added: Table 1 on page 1. Added: Table 20 on page 32, Figure 38 on page 33, Figure 39 on page 34, Figure 40 and Figure 41 on page 35. Changes 07-Sep-2006 20-Mar-2008 22-Mar-2010 38/39 Doc ID 2148 Rev 4 L78Sxx, L78SxxC Please Read Carefully: Information in this document is provided solely in connection with ST products. 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The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. © 2010 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com Doc ID 2148 Rev 4 39/39