L79 Negative voltage regulators Datasheet - production data 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. TO-220FP D²PAK Features • Output current up to 1.5 A • Output voltages of - 5; - 8; - 12; - 15 V • Thermal overload protection • Short circuit protection • Output transition SOA protection • Output tolerance 2% (AC version) or 4% (C version) at 25°C Table 1. Device summary Order codes Output voltages TO-220 TO-220 (single gauge) (dual gauge) L7905ACV L7905ACV-DG L7905ACD2T-TR L7905CV L7905CV-DG L7905CD2T-TR L7908CV L7908CV-DG -8V L7912ACV L7912ACV-DG - 12 V L7912CV L7912CV-DG L7915ACV L7915ACV-DG L7915CV L7915CV-DG June 2014 This is information on a product in full production. D²PAK L7912CD2T-TR TO-220FP -5V L7905CP L7912CP -5V - 12 V - 15 V L7915CP DocID2149 Rev 22 - 15 V 1/28 www.st.com Contents L79 Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 8 Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 2/28 DocID2149 Rev 22 L79 1 Diagram Diagram Figure 1. Schematic diagram DocID2149 Rev 22 3/28 28 Pin configuration 2 L79 Pin configuration Figure 2. Pin connections (top view) IN TO-220 TO220FP D²PAK (any type) 4/28 DocID2149 Rev 22 L79 Maximum ratings 3 Maximum ratings Table 2. Absolute maximum ratings Symbol Parameter Value Unit -35 V VI DC input voltage IO Output current Internally limited PD Power dissipation Internally limited TSTG Storage temperature range TOP Operating junction temperature range Note: -65 to 150 for L79xxC 0 to 150 for L79xxAC 0 to 125 °C °C 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 Unit 3 5 5 °C/W 62.5 50 60 °C/W DocID2149 Rev 22 5/28 28 Test circuit 4 L79 Test circuit Figure 3. Test circuit 6/28 DocID2149 Rev 22 L79 Electrical characteristics 5 Electrical characteristics Refer to the test circuits, TJ = 0 to 125 °C, VI = -10 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified. Table 4. Electrical characteristics of L7905AC Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C -4.9 -5 -5.1 V VO Output voltage IO = -5 mA to -1 A, PO ≤ 15 W VI = -8 to -20 V -4.8 -5 -5.2 V ΔVO(1) Line regulation ΔVO(1) Load regulation Id ΔId ΔVO/ΔT Quiescent current Quiescent current change VI = -7 to -25 V, TJ = 25°C 100 VI = -8 to -12 V, TJ = 25°C 50 IO = 5 mA to 1.5 A, TJ = 25°C 100 IO = 250 to 750 mA, TJ = 25°C 50 TJ = 25°C 3 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 -0.4 mV/°C Output noise voltage B = 10 Hz to 100 kHz, TJ = 25°C 100 µV Supply voltage rejection ΔVI = 10 V, f = 120 Hz 60 dB Vd Dropout voltage IO = 1 A, TJ = 25°C, ΔVO = 100 mV 1.4 V Isc Short circuit current 2.1 A Iscp Short circuit peak current 2.5 A eN SVR TJ = 25°C 54 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. DocID2149 Rev 22 7/28 28 Electrical characteristics L79 Refer to the test circuits, TJ = 0 to 125 °C, VI = -10 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified. Table 5. Electrical characteristics of L7905C Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C -4.8 -5 -5.2 V VO Output voltage IO = -5 mA to -1 A, PO ≤ 15 W VI = -8 to -20 V -4.75 -5 -5.25 V ΔVO(1) Line regulation ΔVO(1) Load regulation Id ΔId ΔVO/ΔT Quiescent current Quiescent current change VI = -7 to -25 V, TJ = 25°C 100 VI = -8 to -12 V, TJ = 25°C 50 IO = 5 mA to 1.5 A, TJ = 25°C 100 IO = 250 to 750 mA, TJ = 25°C 50 TJ = 25°C 3 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 -0.4 mV/°C Output noise voltage B = 10 Hz to 100 kHz, TJ = 25°C 100 µV Supply voltage rejection ΔVI = 10 V, f = 120 Hz 60 dB Vd Dropout voltage IO = 1 A, TJ = 25°C, ΔVO = 100 mV 1.4 V Isc Short circuit current 2.1 A eN SVR 54 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. 8/28 DocID2149 Rev 22 L79 Electrical characteristics Refer to the test circuits, TJ = 0 to 125 °C, VI = -14 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified. Table 6. Electrical characteristics of L7908C Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C -7.7 -8 -8.3 V VO Output voltage IO = -5 mA to -1 A, PO ≤ 15 W VI = -11.5 to -23 V -7.6 -8 -8.4 V ΔVO(1) Line regulation ΔVO(1) Load regulation Id ΔId ΔVO/ΔT Quiescent current Quiescent current change VI = -10.5 to -25 V, TJ = 25°C 160 VI = -11 to -17 V, TJ = 25°C 80 IO = 5 mA to 1.5 A, TJ = 25°C 160 IO = 250 to 750 mA, TJ = 25°C 80 TJ = 25°C 3 mV mV IO = 5 mA to 1 A mA 0.5 mA VI = -11.5 to -25 V 1 Output voltage drift IO = 5 mA -0.6 mV/°C Output noise voltage B = 10 Hz to 100 kHz, TJ = 25°C 175 µV Supply voltage rejection ΔVI = 10 V, f = 120 Hz 60 dB Vd Dropout voltage IO = 1 A, TJ = 25°C, ΔVO = 100 mV 1.1 V Isc Short circuit current 1.5 A eN SVR 54 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. DocID2149 Rev 22 9/28 28 Electrical characteristics L79 Refer to the test circuits, TJ = 0 to 125 °C, VI = -19 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified. Table 7. Electrical characteristics of L7912AC Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C -11.75 -12 -12.25 V VO Output voltage IO = -5 mA to -1 A, PO ≤ 15 W VI = -15.5 to -27 V -11.5 -12 -12.5 V ΔVO(1) Line regulation ΔVO(1) Load regulation Id ΔId ΔVO/ΔT Quiescent current Quiescent current change VI = -14.5 to -30 V, TJ = 25°C 240 VI = -16 to -22 V, TJ = 25°C 120 IO = 5 mA to 1.5 A, TJ = 25°C 240 IO = 250 to 750 mA, TJ = 25°C 120 mV mV TJ = 25°C 3 IO = 5 mA to 1 A 0.5 VI = -15 to -30 V 1 mA mA Output voltage drift IO = 5 mA -0.8 mV/°C Output noise voltage B = 10 Hz to 100 kHz, TJ = 25°C 200 µV Supply voltage rejection ΔVI = 10 V, f = 120 Hz 60 dB Vd Dropout voltage IO = 1 A, TJ = 25°C, ΔVO = 100 mV 1.1 V Isc Short circuit current 1.5 A Iscp Short circuit peak current 2.5 A eN SVR TJ = 25°C 54 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. 10/28 DocID2149 Rev 22 L79 Electrical characteristics Refer to the test circuits, TJ = 0 to 125 °C, VI = -19 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified. Table 8. Electrical characteristics of L7912C Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C -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 ΔVO(1) Line regulation ΔVO(1) Load regulation Id ΔId ΔVO/ΔT Quiescent current Quiescent current change VI = -14.5 to -30 V, TJ = 25°C 240 VI = -16 to -22 V, TJ = 25°C 120 IO = 5 mA to 1.5 A, TJ = 25°C 240 IO = 250 to 750 mA, TJ = 25°C 120 mV mV TJ = 25°C 3 IO = 5 mA to 1 A 0.5 VI = -15 to -30 V 1 mA mA Output voltage drift IO = 5 mA -0.8 mV/°C Output noise voltage B = 10 Hz to 100 kHz, TJ = 25°C 200 µV Supply voltage rejection ΔVI = 10 V, f = 120Hz 60 dB Vd Dropout voltage IO = 1 A, TJ = 25°C, ΔVO = 100 mV 1.1 V Isc Short circuit current 1.5 A eN SVR 54 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. DocID2149 Rev 22 11/28 28 Electrical characteristics L79 Refer to the test circuits, TJ = 0 to 125 °C, VI = -23 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified. Table 9. Electrical characteristics of L7915AC Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C -14.7 -15 -15.3 V VO Output voltage IO = -5 mA to -1 A, PO ≤ 15 W VI = -18.5 to -30 V -14.4 -15 -15.6 V ΔVO(1) Line regulation ΔVO(1) Load regulation Id ΔId ΔVO/ΔT Quiescent current Quiescent current change VI = -17.5 to -30 V, TJ = 25°C 300 VI = -20 to -26 V, TJ = 25°C 150 IO = 5 mA to 1.5 A, TJ = 25°C 300 IO = 250 to 750 mA, TJ = 25°C 150 mV mV TJ = 25°C 3 IO = 5 mA to 1 A mA 0.5 mA VI = -18.5 to -30 V 1 Output voltage drift IO = 5 mA -0.9 mV/°C Output noise voltage B = 10 Hz to 100 kHz, TJ = 25°C 250 µV Supply voltage rejection ΔVI = 10 V, f = 120 Hz 60 dB Vd Dropout voltage IO = 1 A, TJ = 25°C, ΔVO = 100 mV 1.1 V Isc Short circuit current 1.3 A Iscp Short circuit peak current 2.5 A eN SVR TJ = 25°C 54 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. 12/28 DocID2149 Rev 22 L79 Electrical characteristics Refer to the test circuits, TJ = 0 to 125 °C, VI = -23 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified. Table 10. Electrical characteristics of L7915C Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C -14.4 -15 -15.6 V VO Output voltage IO = -5 mA to -1 A, PO ≤ 15 W VI = -18.5 to -30 V -14.3 -15 -15.7 V ΔVO(1) Line regulation ΔVO(1) Load regulation Id ΔId ΔVO/ΔT Quiescent current Quiescent current change VI = -17.5 to -30 V, TJ = 25°C 300 VI = -20 to -26 V, TJ = 25°C 150 IO = 5 mA to 1.5 A, TJ = 25°C 300 IO = 250 to 750 mA, TJ = 25°C 150 mV mV TJ = 25°C 3 IO = 5 mA to 1 A mA 0.5 mA VI = -18.5 to -30 V 1 Output voltage drift IO = 5 mA -0.9 mV/°C Output noise voltage B = 10 Hz to 100 kHz, TJ = 25°C 250 µV Supply voltage rejection ΔVI = 10 V, f = 120 Hz 60 dB Vd Dropout voltage IO = 1 A, TJ = 25°C, ΔVO = 100 mV 1.1 V Isc Short circuit current 1.3 A eN SVR 54 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. DocID2149 Rev 22 13/28 28 Application information 6 L79 Application information Figure 4. Fixed output regulator Note: CI is required for stability. For value given, capacitor must be solid tantalum. If aluminium electrolytic are used, at least ten times value should be selected. CO is required if regulator is located an appreciable distance from 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) (*) Against potential latch-up problems. 14/28 DocID2149 Rev 22 L79 Application information Figure 6. Circuit for increasing output voltage 92 9;; 55 5 9;;5!,G *1' *1 ,1 ,1 / 287 C3 Optional for improved transient response and ripple rejection. Figure 7. High current negative regulator (- 5 V / 4 A with 5 A current limiting) IN OUT GND DocID2149 Rev 22 15/28 28 Package mechanical data 7 L79 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. Figure 8. TO-220 (single gauge) drawing BUHY' 16/28 DocID2149 Rev 22 L79 Package mechanical data Table 11. TO-220 (single gauge) 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 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 14 L1 3.50 3.93 L20 16.40 L30 28.90 ∅P 3.75 3.85 Q 2.65 2.95 DocID2149 Rev 22 17/28 28 Package mechanical data L79 Figure 9. TO-220 (dual gauge) drawing BW\SH$B5HYB7 18/28 DocID2149 Rev 22 L79 Package mechanical data Table 12. TO-220 (dual gauge) 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 D1 1.27 E 10 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 14 L1 3.50 3.93 L20 16.40 L30 28.90 ∅P 3.75 3.85 Q 2.65 2.95 DocID2149 Rev 22 19/28 28 Package mechanical data L79 Figure 10. TO-220FP drawing L7 E A B D Dia L5 L6 F1 F2 F G H G1 L4 L2 L3 7012510_Rev_K 20/28 DocID2149 Rev 22 L79 Package mechanical data Table 13. TO-220FP 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 DocID2149 Rev 22 21/28 28 Package mechanical data L79 Figure 11. D²PAK drawing 0079457_T 22/28 DocID2149 Rev 22 L79 Package mechanical data Table 14. D²PAK 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 E 10 E1 8.50 10.40 e 2.54 e1 4.88 5.28 H 15 15.85 J1 2.49 2.69 L 2.29 2.79 L1 1.27 1.40 L2 1.30 1.75 R V2 0.4 0° 8° DocID2149 Rev 22 23/28 28 Package mechanical data L79 Figure 12. D²PAK footprint(a) 16.90 12.20 5.08 1.60 3.50 9.75 a. All dimensions are in millimeters. 24/28 DocID2149 Rev 22 Footprint L79 8 Packaging mechanical data Packaging mechanical data Figure 13. Tape 10 pitches cumulative tolerance on tape +/- 0.2 mm T P0 Top cover tape P2 D E F B1 K0 For machine ref. only including draft and radii concentric around B0 W B0 A0 P1 D1 User direction of feed R Bending radius User direction of feed AM08852v1 DocID2149 Rev 22 25/28 28 Packaging mechanical data L79 Figure 14. Reel T REEL DIMENSIONS 40mm min. Access hole At slot location B D C N A Full radius G measured at hub Tape slot in core for tape start 25 mm min. width AM08851v2 Table 15. D²PAK tape and reel mechanical data Tape Reel mm mm Dim. 26/28 Dim. Min. Max. A0 10.5 10.7 A B0 15.7 15.9 B 1.5 D 1.5 1.6 C 12.8 D1 1.59 1.61 D 20.2 E 1.65 1.85 G 24.4 F 11.4 11.6 N 100 K0 4.8 5.0 T P0 3.9 4.1 P1 11.9 12.1 Base qty 1000 P2 1.9 2.1 Bulk qty 1000 R 50 T 0.25 0.35 W 23.7 24.3 DocID2149 Rev 22 Min. Max. 330 13.2 26.4 30.4 L79 Revision history 9 Revision history Table 16. Document revision history Date Revision 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. 19-Jan-2010 17 Modified: Table 11 on page 14, added: Figure 8 on page 16, Figure 9 on page 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. 18-Nov-2011 20 Added: order codes L7905CV-DG, L7912CV-DG and L7915CV-DG Table 1 on page 1. 15-May-2012 21 Added: order codes L7908CV-DG Table 1 on page 1. 22 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 circuit, Section 5: Electrical characteristics, Section 6: Application information, Section 7: Package mechanical data. Added Section 8: Packaging mechanical data. Minor text changes. 04-Jun-2014 Changes DocID2149 Rev 22 27/28 28 L79 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. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. 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