L7900AC SERIES 2% NEGATIVE VOLTAGE REGULATORS ■ ■ ■ ■ ■ 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 Parameter DC Input Voltage Value for VO = -5 to -18V -35 for VO = -20, -24V -40 Unit V Output Current Internally Limited Ptot Power Dissipation Internally Limited Tstg Storage Temperature Range Top Operating Junction Temperature Range IO -65 to 150 °C 0 to 125 °C 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 Unit Rthj-case Thermal Resistance Junction-case Max 3 3 °C/W Rthj-amb Thermal Resistance Junction-ambient Max 62.5 50 °C/W Figure 1: Connection Diagram (top view) D2PAK TO-220 Table 3: Ordering Codes TYPE TO-220 D2PAK (*) OUTPUT VOLTAGE L7905AC L7906AC L7908AC L7912AC L7915AC L7918AC L7920AC L7924AC L7905ACV L7906ACV (**) L7908ACV L7912ACV L7915ACV L7918ACV (**) L7920ACV L7924ACV L7905ACD2T L7906ACD2T (**) L7908ACD2T L7912ACD2T L7915ACD2T (**) L7918ACD2T (**) L7920ACD2T (**) L7924ACD2T (**) -5 V -6 V -8 V -12 V -15 V -18 V -20 V -24 V (*) Available in Tape & Reel with the suffix "-TR". (**) Available on Request. 2/13 L7900AC SERIES Figure 2: Application Circuits Table 4: Electrical Characteristics Of L7905A (refer to the test circuits, TJ = 0 to 125°C, VI = -10V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified). Symbol Parameter Test Conditions Min. Typ. Max. Unit -4.9 -5 -5.1 V -4.8 -5 -5.2 V 100 mV VO Output Voltage TJ = 25°C VO Output Voltage IO = -5 mA to -1 A VI = 8 to 20 V ∆VO(*) Line Regulation VI = -7 to -25 V TJ = 25°C VI = -8 to -12 V TJ = 25°C 50 ∆VO(*) Load Regulation IO = 5 mA to 1.5 A TJ = 25°C 100 IO = 250 to 750 mA TJ = 25°C 50 Quiescent Current TJ = 25°C Quiescent Current Change IO = 5 mA to 1 A Id ∆Id PO ≤ 15W VI = -8 to -25 V ∆VO/∆T Output Voltage Drift eN B = 10Hz to 100KHz Supply Voltage Rejection ∆VI = 10 V f = 120Hz Vd Dropout Voltage IO = 1 A mV Isc Short Circuit Current Iscp Short Circuit Peak Current TJ = 25°C TJ = 25°C 3 mA 0.5 mA 1.3 IO = 5 mA Output Noise Voltage SVR mV TJ = 25°C 54 ∆VO = 100 -0.4 mV/°C 100 µV 60 dB 1.4 V 2.1 A 2.5 A (*) 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 125°C, VI = -11V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified). Symbol Parameter Test Conditions Min. Typ. Max. VO Output Voltage TJ = 25°C VO Output Voltage IO = -5 mA to -1 A VI = -9.5 to -21.5 V ∆VO(*) Line Regulation VI = -8.5 to -25 V VI = -9 to -15 V IO = 5 mA to 1.5 A TJ = 25°C 120 IO = 250 to 750 mA TJ = 25°C 60 ∆VO(*) Id ∆Id Load Regulation -6 -6.12 V -6 -6.24 V TJ = 25°C 120 mV TJ = 25°C 60 mV TJ = 25°C 3 mA Quiescent Current Change IO = 5 mA to 1 A 0.5 mA VI = -9.5 to -25 V 1.3 Output Noise Voltage IO = 5 mA B = 10Hz to 100KHz Supply Voltage Rejection ∆VI = 10 V f = 120Hz Vd Dropout Voltage IO = 1 A mV Isc Short Circuit Current Iscp Short Circuit Peak Current SVR -5.88 -5.76 PO ≤ 15W Quiescent Current ∆VO/∆T Output Voltage Drift eN Unit TJ = 25°C 54 ∆VO = 100 TJ = 25°C TJ = 25°C -0.6 mV/°C 144 µV 60 dB 1.4 V 2 A 2.5 A (*) 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 125°C, VI = -14V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified). Symbol Parameter Test Conditions VO Output Voltage TJ = 25°C VO Output Voltage IO = -5 mA to -1 A VI = -11.5 to -23 V ∆VO(*) Line Regulation VI = -10.5 to -25 V VI = -11 to -17 V ∆VO(*) Id ∆Id Load Regulation Min. Typ. -7.84 -8 -8.16 V -8 -8.32 V TJ = 25°C 160 mV 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 Quiescent Current Change IO = 5 mA to 1 A PO ≤ 15W VI = -11.5 to -25 V eN B = 10Hz to 100KHz Supply Voltage Rejection ∆VI = 10 V f = 120Hz Vd Dropout Voltage IO = 1 A mV Isc Short Circuit Current Iscp Short Circuit Peak Current TJ = 25°C TJ = 25°C mV 3 mA 0.5 mA 1 IO = 5 mA Output Noise Voltage SVR Unit -7.68 Quiescent Current ∆VO/∆T Output Voltage Drift Max. TJ = 25°C 54 ∆VO = 100 -0.6 mV/°C 175 µV 60 dB 1.1 V 1.5 A 2.5 A (*) 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 125°C, VI = -19V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified). Symbol Parameter Test Conditions Min. Typ. Max. -11.75 -12 -12.25 V -11.5 -12 -12.5 V mV VO Output Voltage TJ = 25°C VO Output Voltage IO = -5 mA to -1 A VI = -15.5 to -27 V ∆VO(*) Line Regulation 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 ∆VO(*) Id ∆Id Load Regulation TJ = 25°C 3 mA Quiescent Current Change IO = 5 mA to 1 A 0.5 mA VI = -15 to -25 V 1 Output Noise Voltage IO = 5 mA B = 10Hz to 100KHz Supply Voltage Rejection ∆VI = 10 V f = 120Hz Vd Dropout Voltage IO = 1 A mV Isc Short Circuit Current Iscp Short Circuit Peak Current SVR mV Quiescent Current ∆VO/∆T Output Voltage Drift eN PO ≤ 15W Unit TJ = 25°C 54 ∆VO = 100 TJ = 25°C TJ = 25°C -0.8 mV/°C 200 µV 60 dB 1.1 V 1.5 A 2.5 A (*) 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 125°C, VI = -23V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified). Symbol Parameter Test Conditions Min. Typ. Max. Unit -14.7 -15 -15.3 V -14.4 -15 -15.6 V mV VO Output Voltage TJ = 25°C VO Output Voltage IO = -5 mA to -1 A VI = -18.5 to -30 V ∆VO(*) Line Regulation VI = -17.5 to -30 V TJ = 25°C 300 VI = -20 to -26 V TJ = 25°C 150 Load Regulation IO = 5 mA to 1.5 A TJ = 25°C 300 IO = 250 to 750 mA TJ = 25°C 150 Quiescent Current TJ = 25°C ∆VO(*) Id ∆Id Quiescent Current Change PO ≤ 15W IO = 5 mA to 1 A VI = -18.5 to -30 V ∆VO/∆T Output Voltage Drift eN Output Noise Voltage Supply Voltage Rejection ∆VI = 10 V f = 120Hz Vd Dropout Voltage IO = 1 A mV Isc Short Circuit Current Iscp Short Circuit Peak Current SVR TJ = 25°C TJ = 25°C 3 mA 0.5 mA 1 IO = 5 mA B = 10Hz to 100KHz mV TJ = 25°C 54 ∆VO = 100 -0.9 mV/°C 250 µV 60 dB 1.1 V 1.3 A 2.3 A (*) 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 125°C, VI = -27V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified). Symbol Parameter Test Conditions Min. Typ. Max. Unit -17.64 -18 -18.36 V -17.3 -18 -18.7 V mV VO Output Voltage TJ = 25°C VO Output Voltage IO = -5 mA to -1 A VI = -22 to -33 V ∆VO(*) Line Regulation VI = -21 to -33 V TJ = 25°C 360 VI = -24 to -30 V TJ = 25°C 180 IO = 5 mA to 1.5 A TJ = 25°C 360 IO = 250 to 750 mA TJ = 25°C 180 ∆VO(*) Id ∆Id Load Regulation TJ = 25°C 3 mA Quiescent Current Change IO = 5 mA to 1 A 0.5 mA VI = -22 to -33 V 1 Output Noise Voltage IO = 5 mA B = 10Hz to 100KHz Supply Voltage Rejection ∆VI = 10 V f = 120Hz Vd Dropout Voltage IO = 1 A mV Isc Short Circuit Current Iscp Short Circuit Peak Current SVR mV Quiescent Current ∆VO/∆T Output Voltage Drift eN PO ≤ 15W TJ = 25°C 54 ∆VO = 100 TJ = 25°C TJ = 25°C -1 mV/°C 300 µV 60 dB 1.1 V 1.1 A 2.2 A (*) 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 125°C, VI = -29V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified). Symbol Parameter Test Conditions Min. Typ. Max. VO Output Voltage TJ = 25°C VO Output Voltage IO = -5 mA to -1 A VI = -24 to -35 V ∆VO(*) Line Regulation VI = -23 to -35 V VI = -26 to -32 V IO = 5 mA to 1.5 A TJ = 25°C 400 IO = 250 to 750 mA TJ = 25°C 200 ∆VO(*) Id ∆Id Load Regulation Quiescent Current TJ = 25°C Quiescent Current Change IO = 5 mA to 1 A -19.6 -20 -20.4 V -19.2 -20 -20.8 V TJ = 25°C 400 mV TJ = 25°C 200 PO ≤ 15W VI = -24 to -35 V ∆VO/∆T Output Voltage Drift eN B = 10Hz to 100KHz Supply Voltage Rejection ∆VI = 10 V f = 120Hz Vd Dropout Voltage IO = 1 A mV Isc Short Circuit Current Iscp Short Circuit Peak Current TJ = 25°C TJ = 25°C mV 3 mA 0.5 mA 1 IO = 5 mA Output Noise Voltage SVR Unit TJ = 25°C 54 ∆VO = 100 -1.1 mV/°C 350 µV 60 dB 1.1 V 0.9 A 2.2 A (*) 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 125°C, VI = -33V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified). Symbol Parameter Test Conditions Min. Typ. Max. -23.5 -24 -24.5 V -23 -24 -25 V mV VO Output Voltage TJ = 25°C VO Output Voltage IO = -5 mA to -1 A VI = -27 to -38 V ∆VO(*) Line Regulation VI = -27 to -38 V TJ = 25°C 480 VI = -30 to -36 V TJ = 25°C 240 IO = 5 mA to 1.5 A TJ = 25°C 480 IO = 250 to 750 mA TJ = 25°C 240 ∆VO(*) Id ∆Id Load Regulation TJ = 25°C 3 mA Quiescent Current Change IO = 5 mA to 1 A 0.5 mA VI = -27 to -38 V 1 Output Noise Voltage IO = 5 mA B = 10Hz to 100KHz Supply Voltage Rejection ∆VI = 10 V f = 120Hz Vd Dropout Voltage IO = 1 A mV Isc Short Circuit Current Iscp Short Circuit Peak Current SVR mV Quiescent Current ∆VO/∆T Output Voltage Drift eN PO ≤ 15W Unit TJ = 25°C TJ = 25°C TJ = 25°C 54 ∆VO = 100 -1 mV/°C 400 µV 60 dB 1.1 V 1.1 A 2.2 A (*) 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. mm. MIN. TYP inch MAX. MIN. TYP. MAX. A 4.40 4.60 0.173 0.181 C 1.23 1.32 0.048 0.051 D 2.40 2.72 0.094 0.107 D1 1.27 0.050 E 0.49 0.70 0.019 0.027 F 0.61 0.88 0.024 0.034 F1 1.14 1.70 0.044 0.067 F2 1.14 1.70 0.044 0.067 G 4.95 5.15 0.194 0.203 G1 2.4 2.7 0.094 0.106 H2 10.0 10.40 0.393 0.409 L2 16.4 0.645 L4 13.0 14.0 0.511 0.551 L5 2.65 2.95 0.104 0.116 L6 15.25 15.75 0.600 0.620 L7 6.2 6.6 0.244 0.260 L9 3.5 3.93 0.137 0.154 DIA. 3.75 3.85 0.147 0.151 P011C 9/13 L7900AC SERIES D2PAK MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 4.4 4.6 0.173 0.181 A1 2.49 2.69 0.098 0.106 A2 0.03 0.23 0.001 0.009 B 0.7 0.93 0.027 0.036 B2 1.14 1.7 0.044 0.067 C 0.45 0.6 0.017 0.023 C2 1.23 1.36 0.048 0.053 D 8.95 9.35 0.352 0.368 10.4 0.393 4.88 5.28 0.192 D1 E 8 10 E1 G 0.315 8.5 0.409 0.335 0.208 L 15 15.85 0.590 0.624 L2 1.27 1.4 0.050 0.055 L3 1.4 1.75 0.055 0.068 M 2.4 3.2 0.094 R V2 0.4 0˚ 0.126 0.016 8˚ 0˚ 8˚ P011P6G 10/13 L7900AC SERIES Tape & Reel D2PAK-P 2PAK-D 2PAK/A-P 2PAK/A MECHANICAL DATA mm. inch DIM. MIN. TYP A MAX. MIN. TYP. 180 13.0 7.086 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 MAX. 0.504 0.512 14.4 0.519 0.567 Ao 10.50 10.6 10.70 0.413 0.417 0.421 Bo 15.70 15.80 15.90 0.618 0.622 0.626 Ko 4.80 4.90 5.00 0.189 0.193 0.197 Po 3.9 4.0 4.1 0.153 0.157 0.161 P 11.9 12.0 12.1 0.468 0.472 0.476 11/13 L7900AC SERIES Table 12: Revision History Date Revision 22-Jun-2004 7 12/13 Description of Changes Ordering Codes updated Table 3, pag. 2. 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. 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