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 TO-220 TO-3 The L78Sxx series of three-terminal positive regulators is available in TO-220 and TO-3 packages and with 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. Table 1. Device summary Part numbers L78S05 L78S09 L78S12 L78S18 L78S05C L78S09C L78S12C L78S18C L78S75 L78S10 L78S15 L78S24 L78S75C L78S10C L78S15C L78S24C March 2008 Rev 3 1/31 www.st.com 31 Contents L78Sxx - L78SxxC Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Test circuits 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 8 Order codes 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 2/31 ............................................... 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 L78Sxx - L78SxxC 1 Diagram Figure 1. Block diagram Diagram 3/31 Pin configuration L78Sxx - L78SxxC 2 Pin configuration Figure 2. Pin connections (top view) TO-220 Figure 3. 4/31 Schematic diagram TO-3 L78Sxx - L78SxxC Maximum ratings 3 Maximum ratings Table 2. Absolute maximum ratings Symbol Parameter Value for VO= 5 to 18V 35 for VO= 24V 40 VI DC input voltage IO Output current Internally limited PD Power dissipation Internally limited TSTG Storage temperature range TOP Operating junction temperature range Unit V -65 to 150 for L78Sxx °C -55 to 150 °C for L78SxxC 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 TO-220 TO-3 Unit RthJC Thermal resistance junction-case 5 4 °C/W RthJA Thermal resistance junction-ambient 50 35 °C/W Figure 4. Application circuits 5/31 Test circuits 4 Test circuits Figure 5. DC parameter Figure 6. Load regulation Figure 7. Ripple rejection 6/31 L78Sxx - L78SxxC L78Sxx - L78SxxC Electrical characteristics 5 Electrical characteristics Table 4. Electrical characteristics of L78S05 (refer to the test circuits, TJ = 25 °C, VI = 10 V, IO = 500 mA, unless otherwise specified) Symbol Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation IQ ΔIQ ΔVO/ΔT Test conditions IO = 1A, VI = 7V Min. Typ. Max. Unit 4.8 5 5.2 V 4.75 5 5.25 V VI = 7 to 25V 100 VI = 8 to 25V 50 IO = 20 mA to 2A 100 mV 8 mA mV Quiescent current Quiescent current change IO = 20mA to 1A 0.5 VI = 7 to 25 V, IO = 20mA 1.3 mA Output voltage drift IO = 5mA, TJ = -55°C to 150°C -1.1 mV/°C Output noise voltage B =10Hz to 100kHz 40 µV SVR Supply voltage rejection f = 120Hz 60 dB VI Operating input voltage IO ≤1A 8 V RO Output resistance f = 1 kHz 17 mΩ Isc Short circuit current VI = 27V 500 mA Iscp Short circuit peak current 3 A eN 7/31 Electrical characteristics Table 5. Symbol Electrical characteristics of L78S75 (refer to the test circuits, TJ = 25 °C, VI = 12.5 V, IO = 500 mA, unless otherwise specified) Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation IQ ΔIQ ΔVO/ΔT L78Sxx - L78SxxC Test conditions IO = 1A, VI = 9.5V Min. Typ. Max. Unit 7.15 7.5 7.9 V 7.1 7.5 7.95 V VI = 9.5 to 25V 120 VI = 10.5 to 20V 60 IO = 20 mA to 2A 120 mV 8 mA mV Quiescent current Quiescent current change IO = 20mA to 1A 0.5 IO = 20mA, VI = 9.5 to 25V 1.3 mA Output voltage drift IO = 5mA, TJ = -55°C to 150°C -0.8 mV/°C Output noise voltage B =10Hz to 100kHz 52 µV SVR Supply voltage rejection f = 120Hz VI Operating input voltage IO ≤1.5A RO Output resistance f = 1 kHz 16 mΩ Isc Short circuit current VI =27V 500 mA Iscp Short circuit peak current 3 A eN Table 6. Symbol Parameter Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation ΔIQ ΔVO/ΔT dB 10.5 V Electrical characteristics of L78S09 (refer to the test circuits, TJ = 25 °C, VI = 14 V, IO = 500 mA, unless otherwise specified) VO IQ 54 Test conditions IO = 1A, VI = 11V Min. Typ. Max. Unit 8.65 9 9.35 V 8.6 9 9.4 V VI = 11 to 25V 130 VI = 11 to 20V 65 IO = 20 mA to 2A 130 mV 8 mA mV Quiescent current Quiescent current change IO = 20mA to 1A 0.5 VI = 11 to 25 V, IO = 20mA 1.3 mA Output voltage drift IO = 5mA, TJ = -55°C to 150°C -1 mV/°C Output noise voltage B =10Hz to 100kHz 60 µV SVR Supply voltage rejection f = 120Hz 53 dB VI Operating input voltage IO ≤1.5A 12 V RO Output resistance f = 1 kHz 17 mΩ Isc Short circuit current VI = 27V 500 mA Iscp Short circuit peak current 3 A eN 8/31 L78Sxx - L78SxxC Table 7. Symbol Electrical characteristics of L78S10 (refer to the test circuits, TJ = 25 °C, VI = 15 V, IO = 500 mA, unless otherwise specified) Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation IQ ΔIQ ΔVO/ΔT Electrical characteristics Test conditions IO = 1A, VI = 12.5V Min. Typ. Max. Unit 9.5 10 10.5 V 9.4 10 10.6 V VI = 12.5 to 30V 200 VI = 14 to 22V 100 IO = 20 mA to 2A 150 mV 8 mA mV Quiescent current Quiescent current change IO = 20mA to 1A 0.5 mA VI = 12.5 to 30 V, IO = 20mA 1 Output voltage drift IO = 5mA, TJ = -55°C to 150°C -1 mV/°C Output noise voltage B =10Hz to 100kHz 65 µV SVR Supply voltage rejection f = 120Hz 53 dB VI Operating input voltage IO ≤1.5A 13 V RO Output resistance f = 1 kHz 17 mΩ Isc Short circuit current VI = 27V 500 mA Iscp Short circuit peak current 3 A eN Table 8. Symbol Electrical characteristics of L78S12 (refer to the test circuits, TJ = 25 °C, VI = 19 V, IO = 500 mA, unless otherwise specified) Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation IQ ΔIQ ΔVO/ΔT Test conditions IO = 1A, VI = 14.5V Min. Typ. Max. Unit 11.5 12 12.5 V 11.4 12 12.6 V VI = 14.5 to 30V 240 VI = 16 to 22V 120 IO = 20 mA to 2A 160 mV 8 mA mV Quiescent current Quiescent current change IO = 20mA to 1A 0.5 mA VI = 14.5 to 30 V, IO = 20mA 1 Output voltage drift IO = 5mA, TJ = -55°C to 150°C -1 mV/°C Output noise voltage B =10Hz to 100kHz 75 µV SVR Supply voltage rejection f = 120Hz 53 dB VI Operating input voltage IO ≤1.5A 15 V RO Output resistance f = 1 kHz 18 mΩ Isc Short circuit current VI = 27V 500 mA Iscp Short circuit peak current 3 A eN 9/31 Electrical characteristics Table 9. Symbol Electrical characteristics of L78S15 (refer to the test circuits, TJ = 25 °C, VI = 23 V, IO = 500 mA, unless otherwise specified) Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation IQ ΔIQ ΔVO/ΔT L78Sxx - L78SxxC Test conditions IO = 1A, VI = 17.5V Min. Typ. Max. Unit 14.4 15 15.6 V 14.25 15 15.75 V VI = 17.5 to 30V 300 VI = 20 to 26V 150 IO = 20 mA to 2A 180 mV 8 mA mV Quiescent current Quiescent current change IO = 20mA to 1A 0.5 mA VI = 17.5 to 30 V, IO = 20mA 1 Output voltage drift IO = 5mA, TJ = -55°C to 150°C -1 mV/°C Output noise voltage B =10Hz to 100kHz 90 µV SVR Supply voltage rejection f = 120Hz 52 dB VI Operating input voltage IO ≤1.5A 18 V RO Output resistance f = 1 kHz 19 mΩ Isc Short circuit current VI = 27V 500 mA Iscp Short circuit peak current 3 A eN Table 10. Symbol Electrical characteristics of L78S18 (refer to the test circuits, TJ = 25 °C, VI = 26 V, IO = 500 mA, unless otherwise specified) Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation IQ ΔIQ ΔVO/ΔT Test conditions IO = 1A, VI = 20.5V Min. Typ. Max. Unit 17.1 18 18.9 V 17 18 19 V VI = 20.5 to 30V 360 VI = 22 to 28V 180 IO = 20 mA to 2A 200 mV 8 mA mV Quiescent current Quiescent current change IO = 20mA to 1A 0.5 mA VI = 20.5 to 30 V, IO = 20mA 1 Output voltage drift IO = 5mA, TJ = -55°C to 150°C Output noise voltage B =10Hz to 100kHz SVR Supply voltage rejection f = 120Hz 49 dB VI Operating input voltage IO ≤1.5A 21 V RO Output resistance f = 1 kHz 22 mΩ Isc Short circuit current VI = 27V 500 mA Iscp Short circuit peak current 3 A eN 10/31 -1 mV/°C 110 µV L78Sxx - L78SxxC Table 11. Symbol Electrical characteristics of L78S24 (refer to the test circuits, TJ = 25 °C, VI = 33 V, IO = 500 mA, unless otherwise specified) Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation IQ ΔIQ ΔVO/ΔT Electrical characteristics Test conditions IO = 1A, VI = 27V Min. Typ. Max. Unit 23 24 25 V 22.8 24 25.2 V VI = 27 to 38V 480 VI = 30 to 36V 240 IO = 20 mA to 2A 250 mV 8 mA mV Quiescent current Quiescent current change IO = 20mA to 1A 0.5 mA VI = 27 to 38 V, IO = 20mA 1 Output voltage drift IO = 5mA, TJ = -55°C to 150°C -1.5 mV/°C Output noise voltage B =10Hz to 100kHz 170 µV SVR Supply voltage rejection f = 120Hz 48 dB VI Operating input voltage IO ≤1.5A 27 V RO Output resistance f = 1 kHz 23 mΩ Isc Short circuit current VI = 27V 500 mA Iscp Short circuit peak current 3 A eN Table 12. Symbol Electrical characteristics of L78S05C (refer to the test circuits, TJ = 25 °C, VI = 10 V, IO = 500 mA, unless otherwise specified) Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation IQ ΔIQ ΔVO/ΔT Test conditions IO = 1A, VI = 7V Min. Typ. Max. Unit 4.8 5 5.2 V 4.75 5 5.25 V VI = 7 to 25V 100 VI = 8 to 25V 50 IO = 20 mA to 1.5A 100 mV mV IO = 2A 80 Quiescent current Quiescent current change 8 IO = 20mA to 1A 0.5 VI = 7 to 25 V, IO = 20mA 1.3 mA mA Output voltage drift IO = 5mA, TJ = 0°C to 70°C Output noise voltage B =10Hz to 100kHz SVR Supply voltage rejection f = 120Hz 54 dB VI Operating input voltage IO ≤1A 8 V RO Output resistance f = 1 kHz 17 mΩ Isc Short circuit current VI = 27V 500 mA Iscp Short circuit peak current 3 A eN -1.1 mV/°C 40 µV 11/31 Electrical characteristics Table 13. Symbol Electrical characteristics of L78S75C (refer to the test circuits, TJ = 25 °C, VI = 12.5 V, IO = 500 mA, unless otherwise specified) Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation IQ ΔIQ ΔVO/ΔT L78Sxx - L78SxxC Test conditions IO = 1A, VI = 9.5V Min. Typ. Max. Unit 7.15 7.5 7.9 V 7.1 7.5 7.95 V VI = 9.5 to 25V 120 VI = 10.5 to 20V 60 IO = 20 mA to 1.5A 140 mV mV IO = 2A 100 Quiescent current Quiescent current change 8 IO = 20mA to 1A 0.5 VI = 9.5 to 25 V, IO = 20mA 1.3 mA mA Output voltage drift IO = 5mA, TJ = 0°C to 70°C Output noise voltage B =10Hz to 100kHz SVR Supply voltage rejection f = 120Hz VI Operating input voltage IO ≤1A RO Output resistance f = 1 kHz 16 mΩ Isc Short circuit current VI = 27V 500 mA Iscp Short circuit peak current 3 A eN Table 14. Symbol Parameter Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation ΔIQ ΔVO/ΔT mV/°C 52 µV 48 dB 10.5 V Electrical characteristics of L78S09C (refer to the test circuits, TJ = 25 °C, VI = 14 V, IO = 500 mA, unless otherwise specified) VO IQ -0.8 Test conditions IO = 1A, VI = 11V Min. Typ. Max. Unit 8.65 9 9.35 V 8.6 9 9.4 V VI = 11 to 25V 130 VI = 11 to 20V 65 IO = 20 mA to 1.5A 170 mV mV IO = 2A 100 Quiescent current Quiescent current change 8 IO = 20mA to 1A 0.5 VI = 11 to 25 V, IO = 20mA 1.3 mA mA Output voltage drift IO = 5mA, TJ = 0°C to 70°C -1 mV/°C Output noise voltage B =10Hz to 100kHz 60 µV SVR Supply voltage rejection f = 120Hz 47 dB VI Operating input voltage IO ≤1A 12 V RO Output resistance f = 1 kHz 17 mΩ Isc Short circuit current VI = 27V 500 mA Iscp Short circuit peak current 3 A eN 12/31 L78Sxx - L78SxxC Table 15. Symbol Electrical characteristics of L78S10C (refer to the test circuits, TJ = 25 °C, VI = 15 V, IO = 500 mA, unless otherwise specified) Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation IQ ΔIQ ΔVO/ΔT Electrical characteristics Test conditions IO = 1A, VI = 12.5V Min. Typ. Max. Unit 9.5 10 10.5 V 9.4 10 10.6 V VI = 12.5 to 30V 200 VI = 14 to 22V 100 IO = 20 mA to 1.5A 240 mV mV IO = 2A 150 Quiescent current Quiescent current change 8 IO = 20mA to 1A mA 0.5 mA VI = 12.5 to 30 V, IO = 20mA 1 Output voltage drift IO = 5mA, TJ = 0°C to 70°C -1 mV/°C Output noise voltage B =10Hz to 100kHz 65 µV SVR Supply voltage rejection f = 120Hz 47 dB VI Operating input voltage IO ≤1A 13 V RO Output resistance f = 1 kHz 17 mΩ Isc Short circuit current VI = 27V 500 mA Iscp Short circuit peak current 3 A eN Table 16. Symbol Electrical characteristics of L78S12C (refer to the test circuits, TJ = 25 °C, VI = 19 V, IO = 500 mA, unless otherwise specified) Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation IQ ΔIQ ΔVO/ΔT Test conditions IO = 1A, VI = 14.5V Min. Typ. Max. Unit 11.5 12 12.5 V 11.4 12 12.6 V VI = 14.5 to 30V 240 VI = 16 to 22V 120 IO = 20 mA to 1.5A 240 mV mV IO = 2A 150 Quiescent current Quiescent current change 8 IO = 20mA to 1A mA 0.5 mA VI = 14.5 to 30 V, IO = 20mA 1 Output voltage drift IO = 5mA, TJ = 0°C to 70°C -1 mV/°C Output noise voltage B =10Hz to 100kHz 75 µV SVR Supply voltage rejection f = 120Hz 47 dB VI Operating input voltage IO ≤1A 15 V RO Output resistance f = 1 kHz 18 mΩ Isc Short circuit current VI = 27V 500 mA Iscp Short circuit peak current 3 A eN 13/31 Electrical characteristics Table 17. Symbol Electrical characteristics of L78S15C (refer to the test circuits, TJ = 25 °C, VI = 23 V, IO = 500 mA, unless otherwise specified) Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation IQ ΔIQ ΔVO/ΔT L78Sxx - L78SxxC Test conditions IO = 1A, VI = 17.5V Min. Typ. Max. Unit 14.4 15 15.6 V 14.25 15 15.75 V VI = 17.5 to 30V 300 VI = 20 to 26V 150 IO = 20 mA to 1.5A 300 mV mV IO = 2A 150 Quiescent current Quiescent current change 8 IO = 20mA to 1A mA 0.5 mA VI = 17.5 to 30 V, IO = 20mA 1 Output voltage drift IO = 5mA, TJ = 0°C to 70°C -1 mV/°C Output noise voltage B =10Hz to 100kHz 90 µV SVR Supply voltage rejection f = 120Hz 46 dB VI Operating input voltage IO ≤1A 18 V RO Output resistance f = 1 kHz 19 mΩ Isc Short circuit current VI = 27V 500 mA Iscp Short circuit peak current 3 A eN Table 18. Symbol Electrical characteristics of L78S18C (refer to the test circuits, TJ = 25 °C, VI = 26 V, IO = 500 mA, unless otherwise specified) Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation IQ ΔIQ ΔVO/ΔT Test conditions IO = 1A, VI = 20.5V Min. Typ. Max. Unit 17.1 18 18.9 V 17 18 19 V VI = 20.5 to 30V 360 VI = 22 to 28V 180 IO = 20 mA to 1.5A 360 mV mV IO = 2A 200 Quiescent current Quiescent current change 8 IO = 20mA to 1A mA 0.5 mA VI = 20.5 to 30 V, IO = 20mA 1 Output voltage drift IO = 5mA, TJ = 0°C to 70°C Output noise voltage B =10Hz to 100kHz SVR Supply voltage rejection f = 120Hz 43 dB VI Operating input voltage IO ≤1A 21 V RO Output resistance f = 1 kHz 22 mΩ Isc Short circuit current VI = 27V 500 mA Iscp Short circuit peak current 3 A eN 14/31 -1 mV/°C 110 µV L78Sxx - L78SxxC Table 19. Symbol Electrical characteristics of L78S24C (refer to the test circuits, TJ = 25 °C, VI = 33 V, IO = 500 mA, unless otherwise specified) Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation IQ ΔIQ ΔVO/ΔT Electrical characteristics Test conditions IO = 1A, VI = 27V Min. Typ. Max. Unit 23 24 25 V 22.8 24 25.2 V VI = 27 to 38V 480 VI = 30 to 36V 240 IO = 20 mA to 1.5A 480 mV mV IO = 2A 300 Quiescent current Quiescent current change 8 IO = 20mA to 1A mA 0.5 mA VI = 27 to 38 V, IO = 20mA 1 Output voltage drift IO = 5mA, TJ = 0°C to 70°C -1.5 mV/°C Output noise voltage B =10Hz to 100kHz 170 µV SVR Supply voltage rejection f = 120Hz 42 dB VI Operating input voltage IO ≤1A 27 V RO Output resistance f = 1 kHz 28 mΩ Isc Short circuit current VI = 27V 500 mA Iscp Short circuit peak current 3 A eN 15/31 Typical performance 6 Typical performance Figure 8. Dropout voltage vs junction temperature L78Sxx - L78SxxC 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 16/31 L78Sxx - L78SxxC Figure 14. Load transient response Typical performance 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. 17/31 Typical performance 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) 18/31 L78Sxx - L78SxxC 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 19/31 Typical performance Figure 24. Tracking voltage regulator Figure 25. Positive and negative regulator 20/31 L78Sxx - L78SxxC L78Sxx - L78SxxC Typical performance Figure 26. Negative output voltage circuit Figure 27. Switching regulator Figure 28. High input voltage circuit VIN = VI - (VZ + VBE) 21/31 Typical performance Figure 29. High input voltage circuit Figure 30. High output voltage regulator Figure 31. High input and output voltage VO = VXX + VZ1 22/31 L78Sxx - L78SxxC 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. 23/31 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 24/31 VO rises when the light goes up 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 22) 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. 25/31 Package mechanical data 7 L78Sxx - L78SxxC Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. 26/31 L78Sxx - L78SxxC Package mechanical data 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 27/31 Package mechanical data L78Sxx - L78SxxC TO-220 mechanical data Dim. mm. Min. Max. Min. A 4.40 4.60 0.173 0.181 C 1.23 1.32 0.048 0.051 D 2.40 2.72 0.094 D1 Typ. inch. 1.27 Typ. Max. 0.107 0.050 E 0.49 0.70 0.019 0.027 F 0.61 0.88 0.024 0.034 F1 1.14 1.70 0.044 0.067 F2 1.14 1.70 0.044 0.067 G 4.95 5.15 0.194 0.203 G1 2.4 2.7 0.094 0.106 H2 10.0 10.40 0.393 L2 L4 16.4 13.0 0.409 0.645 14.0 0.511 0.551 L5 2.65 2.95 0.104 0.116 L6 15.25 15.75 0.600 0.620 L7 6.2 6.6 0.244 0.260 L9 3.5 3.93 0.137 0.154 DIA. 3.75 3.85 0.147 0.151 P011C 28/31 L78Sxx - L78SxxC Order codes 8 Order codes Table 20. Order codes Packages Part numbers Output voltage TO-220 L78S05 L78S05C L78S05CV L78S75 L78S75C L78S75CV L78S10CV L78S12 L78S12C L78S12CV L78S75CT (1) L78S09T (1) L78S10T (1) L78S24CV 7.5 V 7.5 V 9V 9V L78S10CT (1) (1) L78S12CT L78S15T (1) L78S18T (1) L78S24T (1) 10 V 10 V 12 V 12 V 15 V 15 V L78S18CV L78S24 L78S24C 5V (1) L78S15CV L78S18 L78S18C L78S05CT (1) L78S12T L78S15 L78S15C 5V L78S09CV L78S10 L78S10C L78S05T (1) L78S75T L78S09 L78S09C T0-3 18 V 18 V L78S24CT (1) 24 V 24 V 1. Available on request. 29/31 Revision history L78Sxx - L78SxxC 9 Revision history Table 21. Document revision history Date Revision 07-Sep-2006 2 Order codes updated. 20-Mar-2008 3 Added: Table 1 on page 1. 30/31 Changes L78Sxx - L78SxxC Please Read Carefully: Information in this document is provided solely in connection with ST products. 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