L7900 SERIES NEGATIVE VOLTAGE REGULATORS .. .. . OUTPUT CURRENT UP TO 1.5A OUTPUT VOLTAGES OF – 5; – 5.2; -6; – 8; – 12 ; – 15; –18; – 20; – 22; – 24V THERMAL OVERLOAD PROTECTION SHORT CIRCUIT PROTECTION OUTPUT TRANSISTOR SOA PROTECTION DESCRIPTION The L7900 series of three-terminal negative regulators is available in TO-220 and TO-3 packages and with several output voltages. They can provide local on-card regulation, eliminating the distribution problems associated with single point regulation; furthermore, having the same voltage options as the L7800 positive standard series, they are particularly suited for split power supplies. In addition, the –5.2V is also available for ECL system. If adeguate heatsinking is provided, the L7900 series can deliver an output current in excess of 1.5A. Although designed primarly as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents. TO-3 TO-220 ISOWATT220 SCHEMATIC DIAGRAM January 1993 1/12 L7900 SERIES ABSOLUTE MAXIMUM RATINGS Symbol Parameter Vi DC Input Voltage (for V o = – 5 to – 18V) (for V o = – 20, – 24V) Io Value Unit – 35 – 40 V V Output Current Internally limited Pt o t Total Power Dissipation Internally limited To p Operating Junction Temperature T stg Storage Temperature 0 to + 150 °C – 65 to + 150 °C THERMAL DATA Rthj-case Thermal Resistance Junction-Case Rthj-amb Thermal Resistance Junction-Ambient Max Max TO-3 TO-220 ISOWATT220 4 35 3 50 4 60 o C/W C/W o CONNECTION DIAGRAM AND ORDERING NUMBERS (top views) TYPE TO-3 TO-220 ISOWATT220 OUTPUT VOLTAGE L7905C L7905CT L7905CV L7905CP -5 V L7952C L7906C L7952CT L7906CT L7952CV L7906CV L7906CP -5.2 V -6 V L7908C L7912C L7915C L7908CT L7912CT L7915CT L7908CV L7912CV L7915CV L7908CP L7912CP L7915CP -8 V -12 V -15 V L7918C L7918CT L7918CV L7918CP -18 V L7920C L7922C L7920CT L7922CT L7920CV L7922CV L7920CP -20 V -22 V L7924C L7924CT L7924CV L7924CP -24 V APPLICATION CIRCUIT 2/12 L7900 SERIES ELECTRICAL CHARACTERISTICS FOR L7905C (refer to the test circuits, Tj = 0 to 150 oC, Vi = -10V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified) Symbol Parameter Test Conditions o Min. Typ. Max. Unit 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 Vi = -8 to -12 V ∆Vo* Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA Quiescent Current Tj = 25 oC 3 mA ∆Id Quiescent Current Change Io = 5 to 1000 mA 0.5 mA ∆Id Quiescent Current Change Vi = -8 to -25 V 1.3 mA ∆Vo ∆T Output Voltage Drift Io = 5 mA -0.4 mV/oC Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC 100 µV Id eN Po ≤ 15 W Supply Voltage Rejection ∆Vi = 10 V Io = 1 A Tj = 25 oC ∆VO = 100 mV Isc Short Circuit Current Short Circuit Peak Current -5.2 V -5.25 V 100 50 mV mV 100 50 mV mV Tj = 25 oC Tj = 25 oC Dropout Voltage Iscp -5 -5 Tj = 25 oC Tj = 25 oC Vd SVR -4.8 -4.75 f = 120 Hz 54 o Tj = 25 C 60 dB 1.4 V 2.1 A 2.5 A o ELECTRICAL CHARACTERISTICS FOR L7952C (refer to the test circuits, Tj = 0 to 150 C, Vi = -10V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified) Symbol Parameter Test Conditions o Vo Output Voltage Tj = 25 C Vo Output Voltage Io = -5 mA to -1 A Vi = -9 to -21 V ∆Vo* Line Regulation Vi = -8 to -25 V Vi = -9 to -12 V ∆Vo* Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA Quiescent Current Tj = 25 oC ∆Id Quiescent Current Change Io = 5 to 1000 mA ∆Id Quiescent Current Change Vi = -9 to -25 V ∆Vo ∆T Output Voltage Drift Io = 5 mA Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V Id eN SVR Vd Dropout Voltage Isc Short Circuit Current Iscp Short Circuit Peak Current Po ≤ 15 W Max. -5.0 -5.2 -5.4 V -5.2 -5.45 V 105 52 mV mV 105 52 mV mV 3 mA 0.5 mA 1.3 f = 120 Hz Unit -4.95 Tj = 25 oC Tj = 25 oC Io = 1 A Tj = 25 C ∆VO = 100 mV Tj = 25 C Typ. Tj = 25 oC Tj = 25 oC o o Min. 54 mA -0.5 mV/oC 125 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. Pulce testing with low duty cycle is used. 3/12 L7900 SERIES ELECTRICAL CHARACTERISTICS FOR L7906C (refer to the test circuits, Tj = 0 to 150 oC, Vi = -11V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified) Symbol Parameter Test Conditions o Min. Typ. Max. Unit Vo Output Voltage Tj = 25 C -5.75 -6 -6.25 V Vo Output Voltage Io = -5 mA to -1 A Po ≤ 15 W Vi = -9.5 to -21.5 V -5.7 -6 -6.3 V ∆Vo* Line Regulation Vi = -8.5 to -25 V Tj = 25 oC Vi = -9 to -15 V Tj = 25 oC 120 60 mV mV ∆Vo* Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA 120 60 mV mV Quiescent Current Tj = 25 oC 3 mA ∆Id Quiescent Current Change Io = 5 to 1000 mA 0.5 mA ∆Id Quiescent Current Change Vi = -9.5 to -25 V 1.3 mA ∆Vo ∆T Output Voltage Drift Io = 5 mA -0.6 mV/oC Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC 144 µV Id eN Tj = 25 oC Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V Vd Dropout Voltage Io = 1 A Tj = 25 oC ∆VO = 100 mV Isc Short Circuit Current SVR Iscp Short Circuit Peak Current f = 120 Hz 54 o Tj = 25 C 60 dB 1.4 V 2 A 2.5 A o ELECTRICAL CHARACTERISTICS FOR L7908C (refer to the test circuits, Tj = 0 to 150 C, Vi = -14V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified) Symbol Parameter Test Conditions o 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 Tj = 25 oC Vi = -11 to -17 V Tj = 25 oC ∆Vo* Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA Quiescent Current Tj = 25 oC ∆Id Quiescent Current Change Io = 5 to 1000 mA ∆Id Quiescent Current Change Vi = -11.5 to -25 V ∆Vo ∆T Output Voltage Drift Io = 5 mA Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V Id eN SVR Vd Dropout Voltage Isc Short Circuit Current Iscp Short Circuit Peak Current Po ≤ 15 W Max. f = 120 Hz Unit -7.7 -8 -8.3 V -7.6 -8 -8.4 V 160 80 mV mV 160 80 mV mV 3 mA 0.5 mA 1.3 Io = 1 A Tj = 25 C ∆VO = 100 mV Tj = 25 C Typ. Tj = 25 oC Tj = 25 oC o o Min. 54 mA -0.6 mV/oC 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. Pulce testing with low duty cycle is used. 4/12 L7900 SERIES ELECTRICAL CHARACTERISTICS FOR L7912C (refer to the test circuits, Tj = 0 to 150 oC, Vi = -19V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified) Symbol Parameter Test Conditions o Min. Typ. Max. Unit 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 oC Vi = -16 to -22 V Tj = 25 oC ∆Vo* Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA Quiescent Current Tj = 25 oC 3 mA ∆Id Quiescent Current Change Io = 5 to 1000 mA 0.5 mA ∆Id Quiescent Current Change Vi = -15 to -30 V 1 mA ∆Vo ∆T Output Voltage Drift Io = 5 mA -0.8 mV/oC Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC 200 µV Id eN Po ≤ 15 W Supply Voltage Rejection ∆Vi = 10 V Dropout Voltage Io = 1 A Tj = 25 oC ∆VO = 100 mV Isc Short Circuit Current Iscp Short Circuit Peak Current -12 -12.5 V -12 -12.6 V 240 120 mV mV 240 120 mV mV Tj = 25 oC Tj = 25 oC Vd SVR -11.5 -11.4 f = 120 Hz 54 o Tj = 25 C 60 dB 1.1 V 1.5 A 2.5 A o ELECTRICAL CHARACTERISTICS FOR L7915C (refer to the test circuits, Tj = 0 to 150 C, Vi = -23V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified) Symbol Parameter Test Conditions o 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 oC Vi = -20 to -26 V Tj = 25 oC ∆Vo* Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA Quiescent Current Tj = 25 oC ∆Id Quiescent Current Change Io = 5 to 1000 mA ∆Id Quiescent Current Change Vi = -18.5 to -30 V ∆Vo ∆T Output Voltage Drift Io = 5 mA Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V Id eN SVR Vd Dropout Voltage Isc Short Circuit Current Iscp Short Circuit Peak Current Po ≤ 15 W Max. f = 120 Hz Unit -14.4 -15 -15.6 V -14.3 -15 -15.7 V 300 150 mV mV 300 150 mV mV 3 mA 0.5 mA 1 Io = 1 A Tj = 25 C ∆VO = 100 mV Tj = 25 C Typ. Tj = 25 oC Tj = 25 oC o o Min. 54 mA -0.9 mV/oC 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. Pulce testing with low duty cycle is used. 5/12 L7900 SERIES ELECTRICAL CHARACTERISTICS FOR L7918C (refer to the test circuits, Tj = 0 to 150 oC, Vi = -27V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified) Symbol Parameter Test Conditions o Min. Typ. Max. Unit 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 Vi = -24 to -30 V ∆Vo* Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA Quiescent Current Tj = 25 oC 3 mA ∆Id Quiescent Current Change Io = 5 to 1000 mA 0.5 mA ∆Id Quiescent Current Change Vi = -22 to -33 V 1 mA ∆Vo ∆T Output Voltage Drift Io = 5 mA Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Id eN Po ≤ 15 W Supply Voltage Rejection ∆Vi = 10 V Io = 1 A Tj = 25 oC ∆VO = 100 mV Isc Short Circuit Current Short Circuit Peak Current -18.7 V -18.9 V 360 180 mV mV 360 180 mV mV Tj = 25 oC Tj = 25 oC Dropout Voltage Iscp -18 -18 Tj = 25 oC Tj = 25 oC Vd SVR -17.3 -17.1 f = 120 Hz 54 o Tj = 25 C -1 mV/oC 300 µV 60 dB 1.1 V 1.1 A 2.2 A o ELECTRICAL CHARACTERISTICS FOR L7920C (refer to the test circuits, Tj = 0 to 150 C, Vi = -29V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified) Symbol Parameter Test Conditions o 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 ∆Vo* Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA Quiescent Current Tj = 25 oC ∆Id Quiescent Current Change Io = 5 to 1000 mA ∆Id Quiescent Current Change Vi = -24 to -35 V ∆Vo ∆T Output Voltage Drift Io = 5 mA Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V Id eN SVR Vd Dropout Voltage Isc Short Circuit Current Iscp Short Circuit Peak Current Po ≤ 15 W Max. -19.2 -20 -20.8 V -19 -20 -21 V 400 200 mV mV 400 200 mV mV Tj = 25 oC Tj = 25 oC f = 120 Hz 54 Unit 3 mA 0.5 mA 1 Io = 1 A Tj = 25 C ∆VO = 100 mV Tj = 25 C Typ. Tj = 25 oC Tj = 25 oC o o Min. mA -1.1 mV/oC 350 µV 60 dB 1.1 V 0.9 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. Pulce testing with low duty cycle is used. 6/12 L7900 SERIES ELECTRICAL CHARACTERISTICS FOR L7922C (refer to the test circuits, Tj = 0 to 150 oC, Vi = -31V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified) Symbol Parameter Test Conditions o Min. Typ. Max. Unit Vo Output Voltage Tj = 25 C Vo Output Voltage Io = -5 mA to -1 A Vi = -26 to -37 V ∆Vo* Line Regulation Vi = -25 to -37 V Vi = -28 to -34 V ∆Vo* Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA Quiescent Current Tj = 25 oC 3 mA ∆Id Quiescent Current Change Io = 5 to 1000 mA 0.5 mA ∆Id Quiescent Current Change Vi = -26 to -37 V 1 mA ∆Vo ∆T Output Voltage Drift Io = 5 mA -1.1 mV/oC Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC 375 µV Id eN Po ≤ 15 W Supply Voltage Rejection ∆Vi = 10 V Io = 1 A Tj = 25 oC ∆VO = 100 mV Isc Short Circuit Current Short Circuit Peak Current -22.9 V -23.1 V 440 220 mV mV 440 220 mV mV Tj = 25 oC Tj = 25 oC Dropout Voltage Iscp -22 -22 Tj = 25 oC Tj = 25 oC Vd SVR -21.1 -20.9 f = 120 Hz 54 o Tj = 25 C 60 dB 1.1 V 1.1 A 2.2 A o ELECTRICAL CHARACTERISTICS FOR L7924C (refer to the test circuits, Tj = 0 to 150 C, Vi = -33V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified) Symbol Parameter Test Conditions o 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 Vi = -30 to -36 V ∆Vo* Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA Quiescent Current Tj = 25 oC ∆Id Quiescent Current Change Io = 5 to 1000 mA ∆Id Quiescent Current Change Vi = -27 to -38 V ∆Vo ∆T Output Voltage Drift Io = 5 mA Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V Id eN SVR Vd Dropout Voltage Isc Short Circuit Current Iscp Short Circuit Peak Current Po ≤ 15 W Max. Unit -23 -24 -25 V -22.8 -24 -25.2 V 480 240 mV mV 480 240 mV mV Tj = 25 oC Tj = 25 oC 3 mA 0.5 mA 1 f = 120 Hz Io = 1 A Tj = 25 C ∆VO = 100 mV Tj = 25 C Typ. Tj = 25 oC Tj = 25 oC o o Min. 54 mA -1 mV/oC 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. Pulce testing with low duty cycle is used. 7/12 L7900 SERIES APPLICATION INFORMATION Figure 1 : Fixed Output Regulator. Figure 2 : Split Power Supply (± 15V/1A). Notes : 1. * Against potential latch-up problems. 2. 3. To specify an output voltage, substitute voltage value for ”XX”. Required for stability. For value given, capacitor must be solid tantalum. If aluminium electrolitics are used, at least ten times value should be selected. C 1 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 3 : Circuit for Increasing Output Voltage. VO ≅ VXX ⋅ R1 + R2 R2 VXX > 3Id R2 * C3 Optional for improved transient response and ripple rejection. Figure 5 : Typical ECL System Power Supply (– 5.2V/4A). * Optional dropping resistor to reduce the power dissipated in the boost transistor. 8/12 Figure 4 : High Current Negative Regulator (– 5V/4A with 5A current limiting). L7900 SERIES TO-3 MECHANICAL DATA mm DIM. MIN. inch TYP. MAX. MIN. TYP. MAX. A 11.00 13.10 0.433 0.516 B 0.97 1.15 0.038 0.045 C 1.50 1.65 0.059 0.065 D 8.32 8.92 0.327 0.351 E 19.00 20.00 0.748 0.787 G 10.70 11.10 0.421 0.437 N 16.50 17.20 0.649 0.677 P 25.00 26.00 0.984 1.023 R 4.00 4.09 0.157 0.161 U 38.50 39.30 1.515 1.547 V 30.00 30.30 1.187 1.193 A P C O N B V E G U D R P003F 9/12 L7900 SERIES TO-220 MECHANICAL DATA mm DIM. MIN. inch MAX. MIN. A 4.40 TYP. 4.60 0.173 0.181 C 1.23 1.32 0.048 0.051 D 2.40 2.72 0.094 D1 TYP. MAX. 0.107 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 L2 0.409 16.4 0.645 13.0 14.0 0.511 0.551 L5 2.65 2.95 0.104 0.116 L6 15.2 15.9 0.598 0.625 L7 6.2 6.6 0.244 0.260 L9 3.5 4.2 0.137 0.165 DIA. 3.75 3.85 0.147 0.151 D1 C D A E L4 H2 G G1 F1 L2 F2 F Dia. L5 L9 L7 L6 L4 P011C 10/12 L7900 SERIES ISOWATT220 MECHANICAL DATA mm DIM. MIN. inch TYP. MAX. MIN. TYP. MAX. A 4.4 4.6 0.173 0.181 B 2.5 2.7 0.098 0.106 D 2.5 2.75 0.098 0.108 E 0.4 0.7 0.015 0.027 F 0.75 1 0.030 0.039 F1 1.15 1.7 0.045 0.067 F2 1.15 1.7 0.045 0.067 G 4.95 5.2 0.195 0.204 G1 2.4 2.7 0.094 0.106 H 10 10.4 0.393 0.409 L2 16 0.630 28.6 30.6 1.126 1.204 L4 9.8 10.6 0.385 0.417 L6 15.9 16.4 0.626 0.645 L7 9 9.3 0.354 3.66 Ø 3 3.2 0.118 0.126 B D A E L3 L3 L6 F F1 L7 F2 H G G1 Ø 1 2 3 L2 L4 P011G 11/12 L7900 SERIES Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express written approval of SGS-THOMSON Microelectonics. 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A 12/12