L79 Datasheet Negative voltage regulators Features • Output current up to 1.5 A 3 • Output voltages: -5, -8, -12, and -5 V 1 D2PAK 3 • Thermal overload protection 2 1 • Short-circuit protection TO-220FP • Output SOA protection • Output tolerance 2% (AC version) or 4% (C version) at 25 °C 3 2 1 Description TO-220 The L79 series of three-terminal negative regulators is available in TO-220, TO-220FP 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; furthermore, having the same voltage option as the L78 positive standard series, they are particularly suited for split power supplies. If adequate heat sinking is provided, they can deliver over 1.5 A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents. Maturity status link L79 DS0428 - Rev 24 - January 2019 www.st.com For further information contact your local STMicroelectronics sales office.

L79 Diagram 1 Diagram Figure 1. Schematic diagram R7 Q9 R18 R19 Q8 R6 D1 D2 Q10 Q18 R5 Q11 Q17 R17 Q7 Q2 Q19 OUT Q16 Q20 Q3 Q21 R10 D3 R15 R11 Q1 Q4 Q6 Q12 R20 Q5 R12 R14 R1 R2 R3 R4 R8 R9 R13 R21 Q13 Q14 Q15 Q22 R16 IN DS0428 - Rev 24 page 2/29

L79 Pin configuration 2 Pin configuration Figure 2. Pin connections (top view) OUT OUT IN IN IN GND GND TO-220 TO220FP TO-220 D²PAK (any type) DS0428 - Rev 24 page 3/29

L79 Maximum ratings 3 Maximum ratings Table 1. Absolute maximum ratings Symbol Parameter Value Unit VI DC input voltage -35 V IO Output current Internally limited PD Power dissipation Internally limited TSTG Storage temperature range -65 to 150 °C for L79xxC 0 to 150 TOP Operating junction temperature range °C for L79xxAC 0 to 125 Note: Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Table 2. Thermal data Symbol Parameter D²PAK TO-220 TO-220FP Unit RthJC Thermal resistance junction-case 3 5 5 °C/W RthJA Thermal resistance junction-ambient 62.5 50 60 °C/W DS0428 - Rev 24 page 4/29

L79 Test circuit 4 Test circuit Figure 3. Test circuit C = 2.2 µF C = 1 µF I O GND -V -V I IN L79 OUT I DS0428 - Rev 24 page 5/29

L79 Electrical characteristics 5 Electrical characteristics Refer to the test circuits, T = 0 to 125 °C, V = -10 V, I = 500 mA, C = 2.2 µF, C = 1 µF unless otherwise J I O I O specified. Table 3. Electrical characteristics of L7905AC Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25 °C -4.9 -5 -5.1 V IO = -5 mA to -1 A, PO ≤ 15 W VO Output voltage -4.8 -5 -5.2 V VI = -8 to -20 V VI = -7 to -25 V, TJ = 25 °C 100 ΔVO (1) Line regulation mV VI = -8 to -12 V, TJ = 25 °C 50 IO = 5 mA to 1.5 A, TJ = 25 °C 100 ΔVO (1) Load regulation mV IO = 250 to 750 mA, TJ = 25 °C 50 Id Quiescent current TJ = 25 °C 3 mA IO = 5 mA to 1 A 0.5 ΔId Quiescent current change mA VI = -8 to -25 V 1.3 ΔVO/ΔVT Output voltage drift IO = 5 mA -0.4 mV/°C eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C 100 µV SVR Supply voltage rejection ΔVI = 10 V, f = 120 Hz 54 60 dB Vd Dropout voltage IO = 1 A, TJ = 25 °C, ΔVO = 100 1.4 V mV Isc Short circuit current 1.8 A Iscp Short circuit peak current TJ = 25 °C 1.8 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. Refer to the test circuits, T = 0 to 125 °C, V = -10 V, I = 500 mA, C = 2.2 µF, C = 1 µF unless otherwise J I O I O specified. Table 4. Electrical characteristics of L7905C Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25 °C -4.8 -5 -5.2 V IO = -5 mA to -1 A, PO ≤ 15 W VO Output voltage -4.75 -5 -5.25 V VI = -8 to -20 V VI = -7 to -25 V, TJ = 25 °C 100 ΔVO (1) Line regulation mV VI = -8 to -12 V, TJ = 25 °C 50 IO = 5 mA to 1.5 A, TJ = 25 °C 100 ΔVO (1) Load regulation mV IO = 250 to 750 mA, TJ = 25 °C 50 Id Quiescent current TJ = 25 °C 3 mA DS0428 - Rev 24 page 6/29

L79 Electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. Unit IO = 5 mA to 1 A 0.5 ΔId Quiescent current change mA VI = -8 to -25 V 1.3 ΔVO/ΔT Output voltage drift IO = 5 mA -0.4 mV/°C eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C 100 µV SVR Supply voltage rejection ΔVI = 10 V, f = 120 Hz 54 60 dB Vd Dropout voltage IO = 1 A, TJ = 25 °C, ΔVO = 100 1.4 V mV Isc Short circuit current 1.8 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. Refer to the test circuits, T = 0 to 125 °C, V = -14 V, I = 500 mA, C = 2.2 µF, C = 1 µF unless otherwise J I O I O specified. Table 5. Electrical characteristics of L7908C Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25 °C -7.7 -8 -8.3 V IO = -5 mA to -1 A, PO ≤ 15 W VO Output voltage -7.6 -8 -8.4 V VI = -11.5 to -23 V VI = -10.5 to -25 V, TJ = 25 °C 160 ΔVO (1) Line regulation mV VI = -11 to -17 V, TJ = 25 °C 80 IO = 5 mA to 1.5 A, TJ = 25 °C 160 ΔVO (1) Load regulation mV IO = 250 to 750 mA, TJ = 25 °C 80 Id Quiescent current TJ = 25 °C 3 mA IO = 5 mA to 1 A 0.5 ΔId Quiescent current change mA VI = -11.5 to -25 V 1 ΔVO/ΔT Output voltage drift IO = 5 mA -0.6 mV/°C eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C 175 µV SVR Supply voltage rejection ΔVI = 10 V, f = 120 Hz 54 60 dB Vd Dropout voltage IO = 1 A, TJ = 25 °C, ΔVO = 100 1.1 V mV Isc Short circuit current 1.5 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. DS0428 - Rev 24 page 7/29

L79 Electrical characteristics Refer to the test circuits, T = 0 to 125 °C, V = -19 V, I = 500 mA, C = 2.2 µF, C = 1 µF unless otherwise J I O I O specified. Table 6. Electrical characteristics of L7912AC Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25 °C -11.75 -12 -12.25 V IO = -5 mA to -1 A, PO ≤ 15 W VO Output voltage -11.5 -12 -12.5 V VI = -15.5 to -27 V VI = -14.5 to -30 V, TJ = 25 °C 240 ΔVO (1) Line regulation mV VI = -16 to -22 V, TJ = 25 °C 120 IO = 5 mA to 1.5 A, TJ = 25 °C 240 ΔVO (1) Load regulation mV IO = 250 to 750 mA, TJ = 25 °C 120 Id Quiescent current TJ = 25 °C 3 mA IO = 5 mA to 1 A 0.5 ΔId Quiescent current change mA VI = -15 to -30 V 1 ΔVO/ΔT Output voltage drift IO = 5 mA -0.8 mV/°C eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C 200 µV SVR Supply voltage rejection ΔVI = 10 V, f = 120 Hz 54 60 dB IO = 1 A, TJ = 25 °C, Vd Dropout voltage 1.1 V ΔVO = 100 mV Isc Short circuit current 1.0 A Iscp Short circuit peak current TJ = 25 °C, VI = -10 V 1.8 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. Refer to the test circuits, T = 0 to 125 °C, V = -19 V, I = 500 mA, C = 2.2 µF, C = 1 µF unless otherwise J I O I O specified. Table 7. Electrical characteristics of L7912C Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25 °C -11.5 -12 -12.5 V IO = -5 mA to -1 A, PO ≤ 15 W VO Output voltage -11.4 -12 -12.6 V VI = -15.5 to -27 V VI = -14.5 to -30 V, TJ = 25 °C 240 ΔVO (1) Line regulation mV VI = -16 to -22 V, TJ = 25 °C 120 IO = 5 mA to 1.5 A, TJ = 25 °C 240 ΔVO (1) Load regulation mV IO = 250 to 750 mA, TJ = 25 °C 120 Id Quiescent current TJ = 25 °C 3 mA DS0428 - Rev 24 page 8/29

L79 Electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. Unit IO = 5 mA to 1 A 0.5 ΔId Quiescent current change mA VI = -15 to -30 V 1 ΔVO/ΔT Output voltage drift IO = 5 mA -0.8 mV/°C eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C 200 µV SVR Supply voltage rejection ΔVI = 10 V, f = 120Hz 54 60 dB Vd Dropout voltage IO = 1 A, TJ = 25 °C, ΔVO = 100 1.1 V mV Isc Short circuit current 1.0 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. Refer to the test circuits, T = 0 to 125 °C, V = -23 V, I = 500 mA, C = 2.2 µF, C = 1 µF unless otherwise J I O I O specified. Table 8. Electrical characteristics of L7915AC Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25 °C -14.7 -15 -15.3 V IO = -5 mA to -1 A, PO ≤ 15 W VO Output voltage -14.4 -15 -15.6 V VI = -18.5 to -30 V VI = -17.5 to -30 V, TJ = 25 °C 300 ΔVO (1) Line regulation mV VI = -20 to -26 V, TJ = 25 °C 150 IO = 5 mA to 1.5 A, TJ = 25 °C 300 ΔVO (1) Load regulation mV IO = 250 to 750 mA, TJ = 25 °C 150 Id Quiescent current TJ = 25 °C 3 mA IO = 5 mA to 1 A 0.5 ΔId Quiescent current change mA VI = -18.5 to -30 V 1 ΔVO/ΔT Output voltage drift IO = 5 mA -0.9 mV/°C eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C 250 µV SVR Supply voltage rejection ΔVI = 10 V, f = 120 Hz 54 60 dB IO = 1 A, TJ = 25 °C, Vd Dropout voltage 1.1 V ΔVO = 100 mV Isc Short circuit current 0.7 A Iscp Short circuit peak current TJ = 25 °C, VI = -10 V 1.8 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. DS0428 - Rev 24 page 9/29

L79 Electrical characteristics Refer to the test circuits, T = 0 to 125 °C, V = -23 V, I = 500 mA, C = 2.2 µF, C = 1 µF unless otherwise J I O I O specified. Table 9. Electrical characteristics of L7915C Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25 °C -14.4 -15 -15.6 V IO = -5 mA to -1 A, PO ≤ 15 W VO Output voltage -14.3 -15 -15.7 V VI = -18.5 to -30 V VI = -17.5 to -30 V, TJ = 25 °C 300 ΔVO (1) Line regulation mV VI = -20 to -26 V, TJ = 25 °C 150 IO = 5 mA to 1.5 A, TJ = 25 °C 300 ΔVO (1) Load regulation mV IO = 250 to 750 mA, TJ = 25 °C 150 Id Quiescent current TJ = 25 °C 3 mA IO = 5 mA to 1 A 0.5 ΔId Quiescent current change mA VI = -18.5 to -30 V 1 ΔVO/ΔT Output voltage drift IO = 5 mA -0.9 mV/°C eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C 250 µV SVR Supply voltage rejection ΔVI = 10 V, f = 120 Hz 54 60 dB Vd Dropout voltage IO = 1 A, TJ = 25 °C, ΔVO = 100 1.1 V mV Isc Short circuit current 0.7 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. DS0428 - Rev 24 page 10/29

L79 Application information 6 Application information Figure 4. Fixed output regulator C = 2.2 µF C = 1 µF I O GND -V -V I IN L79 OUT I Note: C is required for stability. For value given, capacitor must be solid tantalum. If aluminium electrolytic are used, at I least ten times value should be selected. C is required if regulator is located an appreciable distance from O power supply filter. To improve transient response. If large capacitors are used, a high current diode from input to output (1N4001 or similar) should be introduced to protect the device from momentary input short circuit. Figure 5. Split power supply (±15 V - 1 A) +20V L7815 +15V 1N4001 0.33µF 0.1µF 2.2µF 1µF 1N4001 -20V L7915 -15V * Against potential latch-up problems DS0428 - Rev 24 page 11/29

L79 Application information Figure 6. Circuit for increasing output voltage Figure 7. High current negative regulator (-5 V / 4 A with 5 A current limiting) 0.2Ω 2N3055 -10V Q1 -5V Q2 IN OUT L7905 BD175 5.6Ω GND 1µF 2.2µF DS0428 - Rev 24 page 12/29

L79 Package information 7 Package information 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. 7.1 TO-220 (single gauge) package information Figure 8. TO-220 (single gauge) package outline 8174627 Rev 6 DS0428 - Rev 24 page 13/29

L79 TO-220 (single gauge) package information Table 10. TO-220 (single gauge) package mechanical data mm Dim. Min. Typ. Max. A 4.40 4.60 b 0.61 0.88 b1 1.14 1.70 c 0.48 0.70 D 15.25 15.75 E 10.00 10.40 e 2.40 2.70 e1 4.95 5.15 F 0.51 0.60 H1 6.20 6.60 J1 2.40 2.72 L 13.00 14.00 L1 3.50 3.93 L20 16.40 L30 28.90 ΦP 3.75 3.85 Q 2.65 2.95 DS0428 - Rev 24 page 14/29

L79 TO-220 type A package information 7.2 TO-220 (dual gauge) package information Figure 9. TO-220 type A package outline 0015988_typeA_Rev_22 DS0428 - Rev 24 page 15/29

L79 TO-220 type A package information Table 11. TO-220 type A package mechanical data mm Dim. Min. Typ. Max. A 4.40 4.60 b 0.61 0.88 b1 1.14 1.55 c 0.48 0.70 D 15.25 15.75 D1 1.27 E 10.00 10.40 e 2.40 2.70 e1 4.95 5.15 F 1.23 1.32 H1 6.20 6.60 J1 2.40 2.72 L 13.00 14.00 L1 3.50 3.93 L20 16.40 L30 28.90 øP 3.75 3.85 Q 2.65 2.95 DS0428 - Rev 24 page 16/29

L79 TO-220FP package information 7.3 TO-220FP package information Figure 10. TO-220FP package outline 7012510_Rev_12_B DS0428 - Rev 24 page 17/29

L79 TO-220FP package information Table 12. TO-220FP package mechanical data mm Dim. Min. Typ. Max. A 4.4 4.6 B 2.5 2.7 D 2.5 2.75 E 0.45 0.7 F 0.75 1 F1 1.15 1.70 F2 1.15 1.70 G 4.95 5.2 G1 2.4 2.7 H 10 10.4 L2 16 L3 28.6 30.6 L4 9.8 10.6 L5 2.9 3.6 L6 15.9 16.4 L7 9 9.3 Dia 3 3.2 DS0428 - Rev 24 page 18/29

L79 D²PAK (TO-263) type A package information 7.4 D²PAK (TO-263) type A package information Figure 11. D²PAK (TO-263) type A package outline 0079457_25 DS0428 - Rev 24 page 19/29

L79 D²PAK (TO-263) type A package information Table 13. D²PAK (TO-263) type A package mechanical data mm Dim. Min. Typ. Max. A 4.40 4.60 A1 0.03 0.23 b 0.70 0.93 b2 1.14 1.70 c 0.45 0.60 c2 1.23 1.36 D 8.95 9.35 D1 7.50 7.75 8.00 D2 1.10 1.30 1.50 E 10.00 10.40 E1 8.30 8.50 8.70 E2 6.85 7.05 7.25 e 2.54 e1 4.88 5.28 H 15.00 15.85 J1 2.49 2.69 L 2.29 2.79 L1 1.27 1.40 L2 1.30 1.75 R 0.40 V2 0° 8° DS0428 - Rev 24 page 20/29

L79 D²PAK (TO-263) type A package information Figure 12. D²PAK (TO-263) recommended footprint (dimensions are in mm) Footprint DS0428 - Rev 24 page 21/29

L79 D²PAK packing information 7.5 D²PAK packing information Figure 13. D²PAK tape outline DS0428 - Rev 24 page 22/29

L79 D²PAK packing information Figure 14. D²PAK reel outline T 40mm min. access hole at slot location B D C N A Tape slot G measured in core for at hub Full radius tape start 2.5mm min.width AM06038v1 Table 14. D²PAK tape and reel mechanical data Tape Reel mm mm Dim. Dim. Min. Max. Min. Max. A0 10.5 10.7 A 330 B0 15.7 15.9 B 1.5 D 1.5 1.6 C 12.8 13.2 D1 1.59 1.61 D 20.2 E 1.65 1.85 G 24.4 26.4 F 11.4 11.6 N 100 K0 4.8 5.0 T 30.4 P0 3.9 4.1 P1 11.9 12.1 Base quantity 1000 P2 1.9 2.1 Bulk quantity 1000 R 50 T 0.25 0.35 W 23.7 24.3 DS0428 - Rev 24 page 23/29

L79 Device summary 8 Device summary Table 15. Order codes TO-220 TO-220 D²PAK TO-220FP Output voltages (single gauge) (dual gauge) L7905ACV L7905ACV-DG L7905ACD2T-TR -5 V L7905CV L7905CV-DG L7905CD2T-TR L7905CP -5 V L7908CV L7908CV-DG -8 V L7912ACV L7912ACV-DG -12 V L7912CV L7912CV-DG L7912CD2T-TR L7912CP -12 V L7915ACV L7915ACV-DG -15 V L7915CV L7915CV-DG L7915CP -15 V DS0428 - Rev 24 page 24/29

L79 Revision history Table 16. Document revision history Date Revision Changes 22-Jun-2004 9 Order codes updated Table 3. 31-Aug-2005 10 Add new order codes (TO-220 E Type) on Table 3. 19-Jan-2007 11 D²PAK mechanical data updated and add footprint data. 06-Jun-2007 12 Order codes updated. 25-Oct-2007 13 Modified: Figure 3, Figure 4, Figure 6 and Figure 7. 05-Dec-2007 14 Modified: Table 1. 18-Feb-2008 15 Modified: Table 1 on page 1. 15-Jul-2008 16 Modified: Table 1 on page 1. Modified: Table 11 on page 14, added: Figure 8 on page 16, Figure 9 on page 17, 19-Jan-2010 17 Figure 10 and Figure 11 on page 18. 26-May-2010 18 Modified: VI parameter Table 2 on page 5. 12-Nov-2010 19 Modified: RthJC value for TO-220 Table 3 on page 5. Added: order codes L7905CV-DG, L7912CV-DG and L7915CV-DG Table 1 on 18-Nov-2011 20 page 1. 15-May-2012 21 Added: order codes L7908CV-DG Table 1 on page 1. Part numbers L79xxC and L79xxAC changed to L79. Updated the features and the description in cover page. Updated Table 1: Device summary, Section 3: Maximum ratings, Section 4: Test 04-Jun-2014 22 circuit, Section 5: Electrical characteristics, Section 6: Application information, Section 7: Package mechanical data. Added Section 8: Packaging mechanical data. Minor text changes. In Table 4: "Electrical characteristics of L7905AC": - updated Isc and Iscp Typ. Values In Table 5: "Electrical characteristics of L7905C": - updated Isc Typ. Values In Table 7: "Electrical characteristics of L7912AC": - updated Isc Typ. Value - updated Iscp Test conditions and Typ. Value 27-Sep-2017 23 In Table_8._Electrical_characteristics_of_L - updated Isc Typ. Value In Table 9: "Electrical characteristics of L7915AC": - updated Isc Typ. Value - updated Iscp Test conditions and Typ. Value In Table 10: "Electrical characteristics of L7915C" - updated Isc Typ. Value Updated Section 7: "Package information" 15-Jan-2019 24 Updated: Section 5 Electrical characteristics. DS0428 - Rev 24 page 25/29

L79 Contents Contents 1 Diagram ...........................................................................2 2 Pin configuration ..................................................................3 3 Maximum ratings ..................................................................4 4 Test circuit ........................................................................5 5 Electrical characteristics...........................................................6 6 Application information...........................................................11 7 Package information..............................................................13 7.1 TO-220 (single gauge) package information .......................................13 7.2 TO-220 (dual gauge) package information.........................................14 7.3 TO-220FP package information .................................................16 7.4 D²PAK (TO-263) type A package information ......................................18 7.5 D²PAK packing information .....................................................21 8 Ordering information .............................................................24 Revision history .......................................................................25 Contents ..............................................................................26 List of tables ..........................................................................27 List of figures..........................................................................28 DS0428 - Rev 24 page 26/29

L79 List of tables List of tables Table 1. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Table 2. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Table 3. Electrical characteristics of L7905AC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 4. Electrical characteristics of L7905C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 5. Electrical characteristics of L7908C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Table 6. Electrical characteristics of L7912AC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 7. Electrical characteristics of L7912C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 8. Electrical characteristics of L7915AC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Table 9. Electrical characteristics of L7915C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 10. TO-220 (single gauge) package mechanical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 11. TO-220 type A package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table 12. TO-220FP package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Table 13. D²PAK (TO-263) type A package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Table 14. D²PAK tape and reel mechanical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Table 15. Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Table 16. Document revision history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 DS0428 - Rev 24 page 27/29

L79 List of figures List of figures Figure 1. Schematic diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Figure 2. Pin connections (top view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Figure 3. Test circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 4. Fixed output regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 5. Split power supply (±15 V - 1 A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 6. Circuit for increasing output voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 7. High current negative regulator (-5 V / 4 A with 5 A current limiting). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 8. TO-220 (single gauge) package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 9. TO-220 type A package outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 10. TO-220FP package outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 11. D²PAK (TO-263) type A package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 12. D²PAK (TO-263) recommended footprint (dimensions are in mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Figure 13. D²PAK tape outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Figure 14. D²PAK reel outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 DS0428 - Rev 24 page 28/29

L79 IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2019 STMicroelectronics – All rights reserved DS0428 - Rev 24 page 29/29