L7905ACD2T-TR

L79xxAC 2 % negative voltage regulators Features ■ ■ ■ ■ ■ Output current to 1.5 A Output voltages of -5; -12; -15 V Thermal overload protection Short circuit protection Output transition SOA protection TO-220 D2PAK Description The L79xxAC series of three-terminal negative regulators is available in TO-220 and D2PAK packages and several fixed output voltages. 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 L78xxA 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. Table 1. Device summary Order codes Output voltages -5 V -12 V -15 V Part numbers TO-220 L7905AC L7912AC L7915AC L7905ACV L7912ACV L7915ACV D2PAK L7905ACD2T-TR L7912ACD2T-TR February 2008 Rev 9 1/20 www.st.com 20 Contents L79xxAC Contents 1 2 3 4 5 6 7 8 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2/20 L79xxAC Diagram 1 Figure 1. Diagram Schematic diagram 3/20 Pin configuration L79xxAC 2 Figure 2. Pin configuration Pin connections (top view) TO-220 D2PAK 4/20 L79xxAC 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 125 °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 Unit °C/W °C/W Table 3. Symbol RthJC RthJA 5/20 Application L79xxAC 4 Figure 3. Application Application circuit 6/20 L79xxAC Electrical characteristics 5 Table 4. Symbol VO VO ΔVO(1) ΔVO(1) Id ΔI d ΔVO/ΔT eN SVR Vd Isc Iscp Electrical characteristics Electrical characteristics of L7905AC (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 Short circuit peak current TJ = 25°C 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 2.5 Test conditions Min. -4.9 -4.8 Typ. -5 -5 Max. -5.1 -5.2 100 mV 50 100 mV 50 3 0.5 mA 1.3 mV/°C µV dB V A 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. 7/20 Electrical characteristics L79xxAC Table 5. Symbol VO VO ΔVO(1) ΔVO(1) Id ΔI d ΔVO/ΔT eN SVR Vd Isc Iscp Electrical characteristics of L7912AC (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 Short circuit peak current TJ = 25°C 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 2.5 Test conditions Min. -11.75 -11.5 Typ. -12 -12 Max. -12.25 -12.5 240 mV 120 240 mV 120 3 0.5 mA 1 mV/°C µV dB V A 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. 8/20 L79xxAC Electrical characteristics Table 6. Symbol VO VO ΔVO(1) ΔVO(1) Id ΔI d ΔVO/ΔT eN SVR Vd Isc Iscp Electrical characteristics of L7915AC (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 Short circuit peak current TJ = 25°C 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 2.5 Test conditions Min. -14.7 -14.4 Typ. -15 -15 Max. -15.3 -15.6 300 mV 150 300 mV 150 3 0.5 mA 1 mV/°C µV dB V A 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. 9/20 Application information L79xxAC 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. 10/20 L79xxAC 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 11/20 Package mechanical data L79xxAC 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. 12/20 L79xxAC Package mechanical data TO-220 mechanical data Dim. A C D D1 E F F1 F2 G G1 H2 L2 L4 L5 L6 L7 L9 DIA. 13.0 2.65 15.25 6.2 3.5 3.75 0.49 0.61 1.14 1.14 4.95 2.4 10.0 16.4 14.0 2.95 15.75 6.6 3.93 3.85 0.511 0.104 0.600 0.244 0.137 0.147 mm. Min. 4.40 1.23 2.40 1.27 0.70 0.88 1.70 1.70 5.15 2.7 10.40 0.019 0.024 0.044 0.044 0.194 0.094 0.393 0.645 0.551 0.116 0.620 0.260 0.154 0.151 Typ. Max. 4.60 1.32 2.72 Min. 0.173 0.048 0.094 0.050 0.027 0.034 0.067 0.067 0.203 0.106 0.409 inch. Typ. Max. 0.181 0.051 0.107 P011C 13/20 Package mechanical data L79xxAC Figure 8. Drawing dimension D2PAK (type STD-ST) 0079457/L 14/20 L79xxAC Package mechanical data Figure 9. Drawing dimension D2PAK (type WOOSEOK-subcon.) 0079457/L 15/20 Package mechanical data L79xxAC Table 7. 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. 16/20 L79xxAC Package mechanical data Figure 10. D2PAK footprint recommended data Table 8. Footprint data Values Dim. A B C D E F G mm. 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 17/20 Package mechanical data L79xxAC 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. 18/20 L79xxAC Revision history 8 Table 9. Date Revision history Document revision history Revision 7 8 9 Order codes updated. Added: Table 1. Modified: Table 1 on page 1. Changes 22-Jun-2004 12-Dec-2007 18-Feb-2008 19/20 L79xxAC 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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