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| L7900AC SERIES 2% NEGATIVE VOLTAGE REGULATORS s s s s s OUTPUT CURRENT TO 1.5A OUTPUT VOLTAGES OF -5; -6; -8; -12; -15; -18; -20; -24V THERMAL OVERLOAD PROTECTION SHORT CIRCUIT PROTECTION OUTPUT TRANSITION SOA PROTECTION DESCRIPTION The L7900AC 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 L7800A positive standard series, they are particularly suited for split power supplies. If adequate heat sinking is provided, they can deliver over 1.5A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents. TO-220 D2PAK SCHEMATIC DIAGRAM June 2004 Rev. 7 1/13 L7900AC SERIES Table 1: Absolute Maximum Ratings Symbol VI IO Ptot Tstg Top DC Input Voltage Output Current Power Dissipation Storage Temperature Range Operating Junction Temperature Range Parameter for VO = -5 to -18V for VO = -20, -24V Value -35 -40 Internally Limited Internally Limited -65 to 150 0 to 125 C C Unit V 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 Rthj-case Rthj-amb Parameter Thermal Resistance Junction-case Thermal Resistance Junction-ambient Max Max D2PAK 3 62.5 TO-220 3 50 Unit C/W C/W Figure 1: Connection Diagram (top view) TO-220 Table 3: Ordering Codes TYPE L7905AC L7906AC L7908AC L7912AC L7915AC L7918AC L7920AC L7924AC (**) Available on Request. D2PAK TO-220 L7905ACV L7906ACV (**) L7908ACV L7912ACV L7915ACV L7918ACV (**) L7920ACV L7924ACV D2PAK (*) L7905ACD2T L7906ACD2T (**) L7908ACD2T L7912ACD2T L7915ACD2T (**) L7918ACD2T (**) L7920ACD2T (**) L7924ACD2T (**) OUTPUT VOLTAGE -5 V -6 V -8 V -12 V -15 V -18 V -20 V -24 V (*) Available in Tape & Reel with the suffix "-TR". 2/13 L7900AC SERIES Figure 2: Application Circuits Table 4: Electrical Characteristics Of L7905A (refer to the test circuits, TJ = 0 to 125C, VI = -10V, IO = 500 mA, CI = 2.2 F, CO = 1 F unless otherwise specified). Symbol VO VO VO(*) VO(*) Id Id Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change TJ = 25C IO = -5 mA to -1 A VI = 8 to 20 V VI = -7 to -25 V VI = -8 to -12 V IO = 5 mA to 1.5 A IO = 250 to 750 mA TJ = 25C IO = 5 mA to 1 A VI = -8 to -25 V VO/T Output Voltage Drift eN SVR Vd Isc Iscp Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current TJ = 25C IO = 5 mA B = 10Hz to 100KHz VI = 10 V f = 120Hz IO = 1 A mV TJ = 25C VO = 100 TJ = 25C 54 -0.4 100 60 1.4 2.1 2.5 PO 15W TJ = 25C TJ = 25C TJ = 25C TJ = 25C Test Conditions Min. -4.9 -4.8 Typ. -5 -5 Max. -5.1 -5.2 100 50 100 50 3 0.5 1.3 mV/C V dB V A A mA mA mV Unit V V mV (*) 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. 3/13 L7900AC SERIES Table 5: Electrical Characteristics Of L7906A (refer to the test circuits, TJ = 0 to 125C, VI = -11V, IO = 500 mA, CI = 2.2 F, CO = 1 F unless otherwise specified). Symbol VO VO VO(*) VO(*) Id Id Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change TJ = 25C IO = -5 mA to -1 A VI = -9.5 to -21.5 V VI = -8.5 to -25 V VI = -9 to -15 V IO = 5 mA to 1.5 A IO = 250 to 750 mA TJ = 25C IO = 5 mA to 1 A VI = -9.5 to -25 V VO/T Output Voltage Drift eN SVR Vd Isc Iscp Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current TJ = 25C IO = 5 mA B = 10Hz to 100KHz VI = 10 V f = 120Hz IO = 1 A mV TJ = 25C VO = 100 TJ = 25C 54 -0.6 144 60 1.4 2 2.5 PO 15W TJ = 25C TJ = 25C TJ = 25C TJ = 25C Test Conditions Min. -5.88 -5.76 Typ. -6 -6 Max. -6.12 -6.24 120 60 120 60 3 0.5 1.3 mV/C V dB V A A mA mA mV Unit V V mV (*) 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: Electrical Characteristics Of L7908A (refer to the test circuits, TJ = 0 to 125C, VI = -14V, IO = 500 mA, CI = 2.2 F, CO = 1 F unless otherwise specified). Symbol VO VO VO(*) VO(*) Id Id Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change TJ = 25C IO = -5 mA to -1 A VI = -11.5 to -23 V VI = -10.5 to -25 V VI = -11 to -17 V IO = 5 mA to 1.5 A IO = 250 to 750 mA TJ = 25C IO = 5 mA to 1 A VI = -11.5 to -25 V VO/T Output Voltage Drift eN SVR Vd Isc Iscp Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current TJ = 25C IO = 5 mA B = 10Hz to 100KHz VI = 10 V f = 120Hz IO = 1 A mV TJ = 25C VO = 100 TJ = 25C 54 -0.6 175 60 1.1 1.5 2.5 PO 15W TJ = 25C TJ = 25C TJ = 25C TJ = 25C Test Conditions Min. -7.84 -7.68 Typ. -8 -8 Max. -8.16 -8.32 160 80 160 80 3 0.5 1 mV/C V dB V A A mA mA mV Unit V V mV (*) 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. 4/13 L7900AC SERIES Table 7: Electrical Characteristics Of L7912A (refer to the test circuits, TJ = 0 to 125C, VI = -19V, IO = 500 mA, CI = 2.2 F, CO = 1 F unless otherwise specified). Symbol VO VO VO(*) VO(*) Id Id Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change TJ = 25C IO = -5 mA to -1 A VI = -15.5 to -27 V VI = -14.5 to -30 V VI = -16 to -22 V IO = 5 mA to 1.5 A IO = 250 to 750 mA TJ = 25C IO = 5 mA to 1 A VI = -15 to -25 V VO/T Output Voltage Drift eN SVR Vd Isc Iscp Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current TJ = 25C IO = 5 mA B = 10Hz to 100KHz VI = 10 V f = 120Hz IO = 1 A mV TJ = 25C VO = 100 TJ = 25C 54 -0.8 200 60 1.1 1.5 2.5 PO 15W TJ = 25C TJ = 25C TJ = 25C TJ = 25C Test Conditions Min. -11.75 -11.5 Typ. -12 -12 Max. -12.25 -12.5 240 120 240 120 3 0.5 1 mV/C V dB V A A mA mA mV Unit V V mV (*) 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: Electrical Characteristics Of L7915A (refer to the test circuits, TJ = 0 to 125C, VI = -23V, IO = 500 mA, CI = 2.2 F, CO = 1 F unless otherwise specified). Symbol VO VO VO(*) VO(*) Id Id Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change TJ = 25C IO = -5 mA to -1 A VI = -18.5 to -30 V VI = -17.5 to -30 V VI = -20 to -26 V IO = 5 mA to 1.5 A IO = 250 to 750 mA TJ = 25C IO = 5 mA to 1 A VI = -18.5 to -30 V VO/T Output Voltage Drift eN SVR Vd Isc Iscp Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current TJ = 25C IO = 5 mA B = 10Hz to 100KHz VI = 10 V f = 120Hz IO = 1 A mV TJ = 25C VO = 100 TJ = 25C 54 -0.9 250 60 1.1 1.3 2.3 PO 15W TJ = 25C TJ = 25C TJ = 25C TJ = 25C Test Conditions Min. -14.7 -14.4 Typ. -15 -15 Max. -15.3 -15.6 300 150 300 150 3 0.5 1 mV/C V dB V A A mA mA mV Unit V V mV (*) 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. 5/13 L7900AC SERIES Table 9: Electrical Characteristics Of L7918A (refer to the test circuits, TJ = 0 to 125C, VI = -27V, IO = 500 mA, CI = 2.2 F, CO = 1 F unless otherwise specified). Symbol VO VO VO(*) VO(*) Id Id Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change TJ = 25C IO = -5 mA to -1 A VI = -22 to -33 V VI = -21 to -33 V VI = -24 to -30 V IO = 5 mA to 1.5 A IO = 250 to 750 mA TJ = 25C IO = 5 mA to 1 A VI = -22 to -33 V VO/T Output Voltage Drift eN SVR Vd Isc Iscp Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current TJ = 25C IO = 5 mA B = 10Hz to 100KHz VI = 10 V f = 120Hz IO = 1 A mV TJ = 25C VO = 100 TJ = 25C 54 -1 300 60 1.1 1.1 2.2 PO 15W TJ = 25C TJ = 25C TJ = 25C TJ = 25C Test Conditions Min. -17.64 -17.3 Typ. -18 -18 Max. -18.36 -18.7 360 180 360 180 3 0.5 1 mV/C V dB V A A mA mA mV Unit V V mV (*) 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: electrical characteristics of L7920A (refer to the test circuits, TJ = 0 to 125C, VI = -29V, IO = 500 mA, CI = 2.2 F, CO = 1 F unless otherwise specified). Symbol VO VO VO(*) VO(*) Id Id Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change TJ = 25C IO = -5 mA to -1 A VI = -24 to -35 V VI = -23 to -35 V VI = -26 to -32 V IO = 5 mA to 1.5 A IO = 250 to 750 mA TJ = 25C IO = 5 mA to 1 A VI = -24 to -35 V VO/T Output Voltage Drift eN SVR Vd Isc Iscp Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current TJ = 25C IO = 5 mA B = 10Hz to 100KHz VI = 10 V f = 120Hz IO = 1 A mV TJ = 25C VO = 100 TJ = 25C 54 -1.1 350 60 1.1 0.9 2.2 PO 15W TJ = 25C TJ = 25C TJ = 25C TJ = 25C Test Conditions Min. -19.6 -19.2 Typ. -20 -20 Max. -20.4 -20.8 400 200 400 200 3 0.5 1 mV/C V dB V A A mA mA mV Unit V V mV (*) 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. 6/13 L7900AC SERIES Table 11: Electrical Characteristics Of L7924A (refer to the test circuits, TJ = 0 to 125C, VI = -33V, IO = 500 mA, CI = 2.2 F, CO = 1 F unless otherwise specified). Symbol VO VO VO(*) VO(*) Id Id Parameter Output Voltage Output Voltage Line Regulation Load Regulation Quiescent Current Quiescent Current Change TJ = 25C IO = -5 mA to -1 A VI = -27 to -38 V VI = -27 to -38 V VI = -30 to -36 V IO = 5 mA to 1.5 A IO = 250 to 750 mA TJ = 25C IO = 5 mA to 1 A VI = -27 to -38 V VO/T Output Voltage Drift eN SVR Vd Isc Iscp Output Noise Voltage Supply Voltage Rejection Dropout Voltage Short Circuit Current Short Circuit Peak Current TJ = 25C IO = 5 mA B = 10Hz to 100KHz VI = 10 V f = 120Hz IO = 1 A mV TJ = 25C VO = 100 TJ = 25C 54 -1 400 60 1.1 1.1 2.2 PO 15W TJ = 25C TJ = 25C TJ = 25C TJ = 25C Test Conditions Min. -23.5 -23 Typ. -24 -24 Max. -24.5 -25 480 240 480 240 3 0.5 1 mV/C V dB V A A mA mA mV Unit V V mV (*) 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. APPLICATIONS INFORMATION Figure 3: Fixed Output Regulator NOTE: 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 electrolytics 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. 7/13 L7900AC SERIES Figure 4: Split Power Supply ( 15V/1A) Against potential latch-up problems. Figure 5: Circuit for Increasing Output Voltage R1 + R2 VO = Vxx R2 Vxx > 3Id R2 C3 Optional for improved transient response and ripple rejection. Figure 6: High Current Negative Regulator (-5V/4A with 5A current limiting) 8/13 L7900AC SERIES 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 9/13 L7900AC SERIES D2PAK MECHANICAL DATA mm. DIM. MIN. A A1 A2 B B2 C C2 D D1 E E1 G L L2 L3 M R V2 0 4.88 15 1.27 1.4 2.4 0.4 8 0 10 8.5 5.28 15.85 1.4 1.75 3.2 0.192 0.590 0.050 0.055 0.094 0.016 8 4.4 2.49 0.03 0.7 1.14 0.45 1.23 8.95 8 10.4 0.393 0.335 0.208 0.624 0.055 0.068 0.126 TYP MAX. 4.6 2.69 0.23 0.93 1.7 0.6 1.36 9.35 MIN. 0.173 0.098 0.001 0.027 0.044 0.017 0.048 0.352 0.315 0.409 TYP. MAX. 0.181 0.106 0.009 0.036 0.067 0.023 0.053 0.368 inch P011P6G 10/13 L7900AC SERIES Tape & Reel D2PAK-P 2PAK-D 2PAK/A-P 2PAK/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 11/13 L7900AC SERIES Table 12: Revision History Date 22-Jun-2004 Revision 7 Description of Changes Ordering Codes updated Table 3, pag. 2. 12/13 L7900AC SERIES Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners (c) 2004 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. http://www.st.com 13/13 |
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