L79XXC

L79xxC Negative voltage regulators Features ■ ■ ■ ■ ■ Output current up to 1.5 A Output voltages of -5; -6; -8; -12; -15; -18; -20; -24V Thermal overload protection Short circuit protection Output transition SOA protection TO-220 TO-220FP Description The L79XXC series of three-terminal negative regulators is available in TO-220, TO-220FP, TO-3 and D2PAK packages and several fixed output voltages, making it useful in a wide range of applications. These regulators can provide local on-card regulation, eliminating the distribution problems associated with single point regulation; furthermore, having the same voltage option as the L78XX 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. D2PAK TO-3 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 Packages Part number TO-220 (A type) L7905CV L7906CV L7908CV L7912CV L7915CV L7918CV L7920CV L7924CV D2PAK L7905CD2T-TR TO-220FP L7905CP TO-3 Out. Volt. -5 V -6 V -8 V L7905C L7906C L7908C L7912C L7915C L7918C L7920C L7924C 1. L7912CD2T-TR L7915CD2T-TR L7912CP L7915CP L7915CT -12 V -15 V -18 V L7920CD2T-TR (1) L7924CP (1) -20 V L7924CT -24 V Available on request. December 2007 Rev 14 1/24 www.st.com 24 Contents L79xxC Contents 1 2 3 4 5 6 7 8 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Test circuit ................................................ 6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2/24 L79xxC Diagram 1 Figure 1. Diagram Schematic diagram 3/24 Pin configuration L79xxC 2 Figure 2. Pin configuration Pin connections (top view) TO-220 TO220FP D2PAK (any type) TO-3 4/24 L79xxC 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 Operating junction temperature range for VO= 5 to 18V for VO= 20, 24V Value -35 V -40 Internally Limited Internally Limited -65 to 150 0 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 D2PAK 3 62.5 TO-220 3 50 TO-220FP 5 60 TO-3 4 35 Unit °C/W °C/W Table 3. Symbol RthJC RthJA 5/24 Test circuit L79xxC 4 Figure 3. Test circuit Test circuit 6/24 L79xxC Electrical characteristics 5 Table 4. Symbol VO VO ΔVO(1) ΔVO(1) Id ΔI d ΔVO/ΔT eN SVR Vd Isc Electrical characteristics Electrical characteristics of L7905C (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) Parameter Output voltage Output voltage TJ = 25°C IO = -5 mA to -1 A, PO ≤15 W VI = -8 to -20 V VI = -7 to -25 V, TJ = 25°C VI = -8 to -12 V, TJ = 25°C Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Dropout voltage Short circuit current IO = 5 mA to 1.5 A, TJ = 25°C IO = 250 to 750 mA, TJ = 25°C TJ = 25°C IO = 5 mA to 1 A VI = -8 to -25 V IO = 5 mA B = 10Hz to 100kHz, TJ = 25°C ΔVI = 10 V, f = 120Hz IO = 1 A, TJ = 25°C, ΔVO = 100 mV 54 -0.4 100 60 1.4 2.1 Test conditions Min. -4.8 -4.75 Typ. -5 -5 Max. -5.2 -5.25 100 mV 50 100 mV 50 3 0.5 mA 1.3 mV/°C µV dB V A mA Unit V V Line regulation 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. 7/24 Electrical characteristics Table 5. Symbol VO VO ΔVO(1) ΔVO(1) Id ΔI d ΔVO/ΔT eN SVR Vd Isc L79xxC Electrical characteristics of L7906C (refer to the test circuits, TJ = 0 to 125 °C, VI = -11 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified) Parameter Output voltage Output voltage TJ = 25°C IO = -5 mA to -1 A, PO ≤15 W VI = -9.5 to -21.5 V VI = -8.5 to -25 V, TJ = 25°C VI = -9 to -15 V, TJ = 25°C Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Dropout voltage Short circuit current IO = 5 mA to 1.5 A, TJ = 25°C IO = 250 to 750 mA, TJ = 25°C TJ = 25°C IO = 5 mA to 1 A VI = -9.5 to -25 V IO = 5 mA B = 10Hz to 100kHz, TJ = 25°C ΔVI = 10 V, f = 120Hz IO = 1 A, TJ = 25°C, ΔVO = 100 mV 54 -0.6 144 60 1.4 2 Test conditions Min. -5.75 -5.7 Typ. -6 -6 Max. -6.25 -6.3 120 mV 60 120 mV 60 3 0.5 mA 1.3 mV/°C µV dB V A mA Unit V V Line regulation 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. Table 6. Symbol VO VO ΔVO(1) ΔVO(1) Id ΔI d ΔVO/ΔT eN SVR Vd Isc Electrical characteristics of L7908C (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) Parameter Output voltage Output voltage TJ = 25°C IO = -5 mA to -1 A, PO ≤15 W VI = -11.5 to -23 V VI = -10.5 to -25 V, TJ = 25°C VI = -11 to -17 V, TJ = 25°C Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Dropout voltage Short circuit current IO = 5 mA to 1.5 A, TJ = 25°C IO = 250 to 750 mA, TJ = 25°C TJ = 25°C IO = 5 mA to 1 A VI = -11.5 to -25 V IO = 5 mA B = 10Hz to 100kHz, TJ = 25°C ΔVI = 10 V, f = 120Hz IO = 1 A, TJ = 25°C, ΔVO = 100 mV 54 -0.6 175 60 1.1 1.5 Test conditions Min. -7.7 -7.6 Typ. -8 -8 Max. -8.3 -8.4 160 mV 80 160 mV 80 3 0.5 mA 1 mV/°C µV dB V A mA Unit V V Line regulation 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. 8/24 L79xxC Table 7. Symbol VO VO ΔVO(1) ΔVO(1) Id ΔI d ΔVO/ΔT eN SVR Vd Isc Electrical characteristics Electrical characteristics of L7912C (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) Parameter Output voltage Output voltage TJ = 25°C IO = -5 mA to -1 A, PO ≤15 W VI = -15.5 to -27 V VI = -14.5 to -30 V, TJ = 25°C VI = -16 to -22 V, TJ = 25°C Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Dropout voltage Short circuit current IO = 5 mA to 1.5 A, TJ = 25°C IO = 250 to 750 mA, TJ = 25°C TJ = 25°C IO = 5 mA to 1 A VI = -15 to -30 V IO = 5 mA B = 10Hz to 100kHz, TJ = 25°C ΔVI = 10 V, f = 120Hz IO = 1 A, TJ = 25°C, ΔVO = 100 mV 54 -0.8 200 60 1.1 1.5 Test conditions Min. -11.5 -11.4 Typ. -12 -12 Max. -12.5 -12.6 240 mV 120 240 mV 120 3 0.5 mA 1 mV/°C µV dB V A mA Unit V V Line regulation 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. Table 8. Symbol VO VO ΔVO(1) ΔVO(1) Id ΔI d ΔVO/ΔT eN SVR Vd Isc Electrical characteristics of L7915C (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) Parameter Output voltage Output voltage TJ = 25°C IO = -5 mA to -1 A, PO ≤15 W VI = -18.5 to -30 V VI = -17.5 to -30 V, TJ = 25°C VI = -20 to -26 V, TJ = 25°C Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Dropout voltage Short circuit current IO = 5 mA to 1.5 A, TJ = 25°C IO = 250 to 750 mA, TJ = 25°C TJ = 25°C IO = 5 mA to 1 A VI = -18.5 to -30 V IO = 5 mA B = 10Hz to 100kHz, TJ = 25°C ΔVI = 10 V, f = 120Hz IO = 1 A, TJ = 25°C, ΔVO = 100 mV 54 -0.9 250 60 1.1 1.3 Test conditions Min. -14.4 -14.3 Typ. -15 -15 Max. -15.6 -15.7 300 mV 150 300 mV 150 3 0.5 mA 1 mV/°C µV dB V A mA Unit V V Line regulation 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. 9/24 Electrical characteristics Table 9. Symbol VO VO ΔVO(1) ΔVO(1) Id ΔI d ΔVO/ΔT eN SVR Vd Isc L79xxC Electrical characteristics of L7918C (refer to the test circuits, TJ = 0 to 125 °C, VI = -27 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified) Parameter Output voltage Output voltage TJ = 25°C IO = -5 mA to -1 A, PO ≤15 W VI = -22 to -33 V VI = -21 to -33 V, TJ = 25°C VI = -24 to -30 V, TJ = 25°C Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Dropout voltage Short circuit current IO = 5 mA to 1.5 A, TJ = 25°C IO = 250 to 750 mA, TJ = 25°C TJ = 25°C IO = 5 mA to 1 A VI = -22 to -33 V I O = 5 mA B = 10Hz to 100kHz, TJ = 25°C ΔVI = 10 V, f = 120Hz IO = 1 A, TJ = 25°C, ΔVO = 100 mV 54 -1 300 60 1.1 1.1 Test conditions Min. -17.3 -17.1 Typ. -18 -18 Max. -18.7 -18.9 360 mV 180 360 mV 180 3 0.5 mA 1 mV/°C µV dB V A mA Unit V V Line regulation 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. Table 10. Symbol VO VO ΔVO(1) ΔVO(1) Id ΔI d ΔVO/ΔT eN SVR Vd Isc Electrical characteristics of L7920C (refer to the test circuits, TJ = 0 to 125 °C, VI = -29 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified) Parameter Output voltage Output voltage TJ = 25°C IO = -5 mA to -1 A, PO ≤15 W VI = -24 to -35 V VI = -23 to -35 V, TJ = 25°C VI = -26 to -32 V, TJ = 25°C Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Dropout voltage Short circuit current IO = 5 mA to 1.5 A, TJ = 25°C IO = 250 to 750 mA, TJ = 25°C TJ = 25°C IO = 5 mA to 1 A VI = -24 to -35 V IO = 5 mA B = 10Hz to 100kHz, TJ = 25°C ΔVI = 10 V, f = 120Hz IO = 1 A, TJ = 25°C, ΔVO = 100 mV 54 -1.1 350 60 1.1 0.9 Test conditions Min. -19.2 -19 Typ. -20 -20 Max. -20.8 -21 400 mV 200 400 mV 200 3 0.5 mA 1 mV/°C µV dB V A mA Unit V V Line regulation 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. 10/24 L79xxC Table 11. Symbol VO VO ΔVO(1) ΔVO(1) Id ΔI d ΔVO/ΔT eN SVR Vd Isc Electrical characteristics Electrical characteristics of L7924C (refer to the test circuits, TJ = 0 to 125 °C, VI = -33 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified) Parameter Output voltage Output voltage TJ = 25°C IO = -5 mA to -1 A, PO ≤15 W VI = -27 to -38 V VI = -27 to -38 V, TJ = 25°C VI = -30 to -36 V, TJ = 25°C Load regulation Quiescent current Quiescent current change Output voltage drift Output noise voltage Supply voltage rejection Dropout voltage Short circuit current IO = 5 mA to 1.5 A, TJ = 25°C IO = 250 to 750 mA, TJ = 25°C TJ = 25°C IO = 5 mA to 1 A VI = -27 to -38 V I O = 5 mA B = 10Hz to 100kHz, TJ = 25°C ΔVI = 10 V, f = 120Hz IO = 1 A, TJ = 25°C, ΔVO = 100 mV 54 -1 400 60 1.1 1.1 Test conditions Min. -23 -22.8 Typ. -24 -24 Max. -24.5 -25.2 480 mV 240 480 mV 240 3 0.5 mA 1 mV/°C µV dB V A mA Unit V V Line regulation 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 11/24 Application information L79xxC 6 Figure 4. Application information Fixed output regulator 1. To specify an output voltage, substitute voltage value for "XX". 2. Required for stability. For value given, capacitor must be solid tantalum. If aluminium electrolytic are used, at least ten times value should be selected. C1 is required if regulator is located an appreciable distance from power supply filter. 3. 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. 12/24 L79xxC Application information Figure 6. Circuit for increasing output voltage VO=VXX(R1+R2)/R2 VXX/R2 > 3Id GND IN OUT 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 13/24 Package mechanical data L79xxC 7 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. 14/24 L79xxC Package mechanical data 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 B E 15/24 Package mechanical data L79xxC TO-220 (A type) mechanical data Dim. A b b1 c D E e e1 F H1 J1 L L1 L20 L30 φP Q 3.75 2.65 mm. Min. 4.40 0.61 1.15 0.49 15.25 10.0 2.4 4.95 1.23 6.2 2.40 13.0 3.5 16.4 28.9 3.85 2.95 0.148 0.104 Typ. Max. 4.60 0.88 1.70 0.70 15.75 10.40 2.7 5.15 1.32 6.6 2.72 14.0 3.93 Min. 0.173 0.024 0.045 0.019 0.600 0.394 0.094 0.195 0.048 0.244 0.094 0.512 0.138 0.646 1.138 0.152 0.116 inch. Typ. Max. 0.181 0.035 0.067 0.028 0.620 0.409 0.106 0.203 0.052 0.260 0.107 0.551 0.155 0015988/N 16/24 L79xxC Package mechanical data TO-220FP mechanical data Dim. A B D E F F1 F2 G G1 H L2 L3 L4 L5 L6 L7 DIA. 28.6 9.8 2.9 15.9 9 3 mm. Min. 4.40 2.5 2.5 0.45 0.75 1.15 1.15 4.95 2.4 10.0 16 30.6 10.6 3.6 16.4 9.3 3.2 1.126 0.385 0.114 0.626 0.354 0.118 Typ Max. 4.60 2.7 2.75 0.70 1 1.50 1.50 5.2 2.7 10.40 Min. 0.173 0.098 0.098 0.017 0.030 0.045 0.045 0.194 0.094 0.393 0.630 1.204 0.417 0.142 0.645 0.366 0.126 inch. Typ. Max. 0.181 0.106 0.108 0.027 0.039 0.059 0.059 0.204 0.106 0.409 7012510A-H 17/24 Package mechanical data L79xxC Figure 8. Drawing dimension D2PAK (type STD-ST) 0079457/L 18/24 L79xxC Package mechanical data Figure 9. Drawing dimension D2PAK (type WOOSEOK-subcon.) 0079457/L 19/24 Package mechanical data L79xxC Table 12. D2PAK mechanical data Type STD-ST Type WOOSEOK-subcon. mm. Max. 4.60 0.23 0.93 1.70 0.60 1.36 9.35 Min. 4.30 0 0.70 1.17 0.45 1.25 9 7.50 10.40 9.80 7.50 2.54 4.88 15 2.49 2.29 1.27 1.30 0.4 0° 8° 0° 5.28 15.85 2.69 2.79 1.40 1.75 15 2.20 1.79 1 1.20 0.30 3° 2.54 5.08 15.30 15.60 2.60 2.79 1.40 1.60 10.20 0.50 1.30 9.20 Typ. Max. 4.70 0.20 0.90 1.37 0.60 1.40 9.40 Dim. Min. A A1 b b2 c c2 D D1 E E1 e e1 H J1 L L1 L2 R V2 4.40 0.03 0.70 1.14 0.45 1.23 8.95 7.50 10 8.50 mm. Typ. Note: The D2PAK package coming from the subcontractor WOOSEOK is fully compatible with the ST's package suggested footprint. 20/24 L79xxC Package mechanical data Figure 10. D2PAK footprint recommended data Table 13. Footprint data Values mm. A B C D E F G 12.20 9.75 16.90 3.50 1.60 2.54 5.08 inch. 0.480 0.384 0.665 0.138 0.063 0.100 0.200 21/24 Package mechanical data L79xxC Tape & reel D2PAK-P2PAK-D2PAK/A-P2PAK/A mechanical data mm. Dim. Min. A C D N T Ao Bo Ko Po P 10.50 15.70 4.80 3.9 11.9 10.6 15.80 4.90 4.0 12.0 12.8 20.2 60 14.4 10.70 15.90 5.00 4.1 12.1 0.413 0.618 0.189 0.153 0.468 0.417 0.622 0.193 0.157 0.472 13.0 Typ. Max. 180 13.2 0.504 0.795 2.362 0.567 0.421 0.626 0.197 0.161 0.476 0.512 Min. Typ. Max. 7.086 0.519 inch. 22/24 L79xxC Revision history 8 Table 14. Date Revision history Document revision history Revision 9 10 11 12 13 14 Changes Order Codes updated Table 3, pag. 3. Add new order codes (TO-220 E Type) on Table 3, pag. 3. D2PAK mechanical data has been updated, add footprint data and the document reformatted. Order codes updated. Modified: Figure 3, Figure 4, Figure 6 and Figure 7. Modified: Table 1. 22-Jun-2004 31-Aug-2005 19-Jan-2007 06-Jun-2007 25-Oct-2007 05-Dec-2007 23/24 L79xxC Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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