L7900 SERIES NEGATIVE VOLTAGE REGULATORS ■ ■ ■ ■ ■ OUTPUT CURRENT UP TO 1.5 A OUTPUT VOLTAGES OF -5; -5.2; -6; -8; -9; -12; -15; -18; -20; -22; -24V THERMAL OVERLOAD PROTECTION SHORT CIRCUIT PROTECTION OUTPUT TRANSITION SOA PROTECTION DESCRIPTION The L7900 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 L7800 positive standard series, they are particularly suited for split power supplies. In addition, the -5.2V is also available for ECL system. 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. 1 3 1 2 TO-3 TO-220 D2PAK TO-220FP SCHEMATIC DIAGRAM November 2000 1/13 L7900 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit -35 -40 V V Vi DC Input Voltage (for VO = 5 to 18V) (for V O = 20, 24V) Io Output Current Internally limited P tot Power Dissipation Internally limited T op Operating Junction Temperature Range T st g Storage Temperature Range 0 to 150 o C - 65 to 150 o C THERMAL DATA Symbol D2PAK Parameter R thj- ca se Thermal Resistance Junction-case Max R thj- amb Thermal Resistance Junction-ambient Max TO-220 3 62.5 3 50 TO-220FP 5 60 TO-3 4 35 Unit o o C/W C/W CONNECTION DIAGRAM AND ORDERING NUMBERS (top view) 2 TO-220 & TO-220FP Type L7905C L7952C L7906C L7908C L7912C L7915C L7918C L7920C L7922C L7924C TO-220 L7905CV L7952CV L7906CV L7908CV L7912CV L7915CV L7918CV L7920CV L7922CV L7924CV D PAK D2PAK (*) L7905CD2T L7952CD2T L7906CD2T L7908CD2T L7912CD2T L7915CD2T L7918CD2T L7920CD2T L7922CD2T L7924CD2T (*) AVAILABLE IN TAPE AND REEL WITH ”-TR” SUFFIX APPLICATION CIRCUIT 2/13 TO-220FP L7905CP L7906CP L7908CP L7912CP L7915CP L7918CP L7920CP L7924CP TO-3 TO-3 L7905CT L7952CT L7906CT L7908CT L7912CT L7915CT L7918CT L7920CT L7922CT L7924CT Output Voltage -5V -5.2V -6V -8V -12V -15V -18V -20V -22V -24V L7900 ELECTRICAL CHARACTERISTICS FOR L7905C (refer to the test circuits, T j = 0 to 150 oC, Vi = -10V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit -4.8 -5 -5.2 V -4.75 -5 -5.25 V 100 50 mV mV 100 50 mV mV 3 mA 0.5 mA Vo Output Voltage Tj = 25 oC Vo Output Voltage Io = -5 mA to -1 A Vi = 8 to 20 V ∆V o * Line Regulation Vi = -7 to -25 V Vi = -8 to -12 V ∆V o * Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA Quiescent Current Tj = 25 C ∆I d Quiescent Current Change Io = 5 to 1000 mA ∆I d Quiescent Current Change Vi = -8 to -25 V 1.3 mA ∆ Vo Output Voltage Drift Io = 5 mA Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V Id Po ≤ 15 W Tj = 25 oC Tj = 25 oC Tj = 25 oC o Tj = 25 C o o -0.4 mV/ C 100 µV 60 dB 1.4 V 2.1 A ∆T eN SVR Vd Dropout Voltage Is c Short Circuit Current f = 120 Hz 54 o Io = 1 A Tj = 25 C ∆VO = 100 mV ELECTRICAL CHARACTERISTICS FOR L7952C (refer to the test circuits, T j = 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 -5.0 -4.95 -5.2 -5.4 V -5.2 -5.45 V 105 52 mV mV 105 52 mV mV 3 mA Vo Output Voltage Vo Output Voltage Io = -5 mA to -1 A Vi = -9 to -21 V ∆V o * Line Regulation Vi = -8 to -25 V Vi = -9 to -12 V ∆V o * Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA Quiescent Current Tj = 25 oC ∆I d Quiescent Current Change Io = 5 to 1000 mA 0.5 mA ∆I d Quiescent Current Change Vi = -9 to -25 V 1.3 mA ∆ Vo Output Voltage Drift Io = 5 mA -0.5 mV/ oC Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC 125 µV Supply Voltage Rejection ∆Vi = 10 V 60 dB 1.4 V 2 A Id Tj = 25 C Po ≤ 15 W Tj = 25 oC o Tj = 25 C Tj = 25 oC Tj = 25 oC ∆T eN SVR Vd Dropout Voltage Is c Short Circuit Current f = 120 Hz o Io = 1 A Tj = 25 C ∆VO = 100 mV 54 * 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. 3/13 L7900 ELECTRICAL CHARACTERISTICS FOR L7906C (refer to the test circuits, T j = 0 to 150 oC, Vi = -11V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified) Symbol Min. Typ. Max. Unit Vo Output Voltage Tj = 25 oC -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 ∆V o * Line Regulation Vi = -8.5 to -25 V Tj = 25 oC Vi = -9 to -15 V Tj = 25 oC 120 60 mV mV ∆V o * Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA 120 60 mV mV Quiescent Current Tj = 25 C 3 mA ∆I d Quiescent Current Change Io = 5 to 1000 mA 0.5 mA ∆I d Quiescent Current Change Vi = -9.5 to -25 V 1.3 mA ∆ Vo Output Voltage Drift Io = 5 mA Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V Id Parameter Test Conditions Tj = 25 oC o Tj = 25 C o o -0.6 mV/ C 144 µV 60 dB 1.4 V 2 A ∆T eN SVR Vd Dropout Voltage Is c Short Circuit Current f = 120 Hz 54 o Io = 1 A Tj = 25 C ∆VO = 100 mV ELECTRICAL CHARACTERISTICS FOR L7908C (refer to the test circuits, T j = 0 to 150 oC, Vi = -14V, 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 -7.7 -8 -8.3 V Vo Output Voltage Io = -5 mA to -1 A Po ≤ 15 W Vi = -11.5 to -23 V -7.6 -8 -8.4 V ∆V o * Line Regulation Vi = -10.5 to -25 V Tj = 25 oC o Vi = -11 to -17 V Tj = 25 C 160 80 mV mV ∆V o * Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA 160 80 mV mV Quiescent Current Tj = 25 oC 3 mA ∆I d Quiescent Current Change Io = 5 to 1000 mA 0.5 mA ∆I d Quiescent Current Change Vi = -11.5 to -25 V 1.3 mA ∆ Vo Output Voltage Drift Io = 5 mA -0.6 mV/ oC Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC 175 µV Supply Voltage Rejection ∆Vi = 10 V 60 dB 1.1 V 1.5 A Id Tj = 25 oC Tj = 25 oC ∆T eN SVR Vd Dropout Voltage Is c Short Circuit Current f = 120 Hz o Io = 1 A Tj = 25 C ∆VO = 100 mV 54 * 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. 4/13 L7900 ELECTRICAL CHARACTERISTICS FOR L7912C (refer to the test circuits, T j = 0 to 150 oC, Vi = -19V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified) Symbol Min. Typ. Max. Unit Vo Output Voltage Tj = 25 oC -11.5 -12 -12.5 V Vo Output Voltage Io = -5 mA to -1 A Po ≤ 15 W Vi = -15.5 to -27 V -11.4 -12 -12.6 V ∆V o * Line Regulation Vi = -14.5 to -30 V Tj = 25 oC Vi = -16 to -22 V Tj = 25 oC 240 120 mV mV ∆V o * Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA 240 120 mV mV Quiescent Current Tj = 25 C 3 mA ∆I d Quiescent Current Change Io = 5 to 1000 mA 0.5 mA ∆I d Quiescent Current Change Vi = -15 to -30 V 1 mA ∆ Vo Output Voltage Drift Io = 5 mA Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V Id Parameter Test Conditions Tj = 25 oC o Tj = 25 C o o -0.8 mV/ C 200 µV 60 dB 1.1 V 1.5 A ∆T eN SVR Vd Dropout Voltage Is c Short Circuit Current f = 120 Hz 54 o Io = 1 A Tj = 25 C ∆VO = 100 mV ELECTRICAL CHARACTERISTICS FOR L7915C (refer to the test circuits, T j = 0 to 150 oC, Vi = -23V, 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 -14.4 -15 -15.6 V Vo Output Voltage Io = -5 mA to -1 A Po ≤ 15 W Vi = -18.5 to -30 V -14.3 -15 -15.7 V ∆V o * Line Regulation Vi = -17.5 to -30 V Tj = 25 oC o Vi = -20 to -26 V Tj = 25 C 300 150 mV mV ∆V o * Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA 300 150 mV mV Quiescent Current Tj = 25 oC 3 mA ∆I d Quiescent Current Change Io = 5 to 1000 mA 0.5 mA ∆I d Quiescent Current Change Vi = -18.5 to -30 V 1 mA ∆ Vo Output Voltage Drift Io = 5 mA -0.9 mV/ oC Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC 250 µV Supply Voltage Rejection ∆Vi = 10 V 60 dB 1.1 V 1.3 A Id Tj = 25 oC Tj = 25 oC ∆T eN SVR Vd Dropout Voltage Is c Short Circuit Current f = 120 Hz o Io = 1 A Tj = 25 C ∆VO = 100 mV 54 * 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. 5/13 L7900 ELECTRICAL CHARACTERISTICS FOR L7918C (refer to the test circuits, T j = 0 to 150 oC, Vi = -27V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit -17.3 -18 -18.7 V -17.1 -18 -18.9 V 360 180 mV mV 360 180 mV mV 3 mA 0.5 mA Vo Output Voltage Tj = 25 oC Vo Output Voltage Io = -5 mA to -1 A Vi = -22 to -33 V ∆V o * Line Regulation Vi = -21 to -33 V Vi = -24 to -30 V ∆V o * Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA Quiescent Current Tj = 25 C ∆I d Quiescent Current Change Io = 5 to 1000 mA ∆I d Quiescent Current Change Vi = -22 to -33 V 1 mA ∆ Vo Output Voltage Drift Io = 5 mA Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V Id Po ≤ 15 W Tj = 25 oC Tj = 25 oC Tj = 25 oC o Tj = 25 C o o -1 mV/ C 300 µV 60 dB 1.1 V 1.1 A ∆T eN SVR Vd Dropout Voltage Is c Short Circuit Current f = 120 Hz 54 o Io = 1 A Tj = 25 C ∆VO = 100 mV ELECTRICAL CHARACTERISTICS FOR L7920C (refer to the test circuits, T j = 0 to 150 oC, Vi = -29V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified) Symbol Parameter Test Conditions o Min. Typ. Max. Unit -19.2 -20 -20.8 V -19 -20 -21 V 400 200 mV mV 400 200 mV mV 3 mA Vo Output Voltage Vo Output Voltage Io = -5 mA to -1 A Vi = -24 to -35 V ∆V o * Line Regulation Vi = -23 to -35 V Vi = -26 to -32 V ∆V o * Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA Quiescent Current Tj = 25 oC ∆I d Quiescent Current Change Io = 5 to 1000 mA 0.5 mA ∆I d Quiescent Current Change Vi = -24 to -35 V 1 mA ∆ Vo Output Voltage Drift Io = 5 mA -1.1 mV/ oC Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC 350 µV Supply Voltage Rejection ∆Vi = 10 V 60 dB 1.1 V 0.9 A Id Tj = 25 C Po ≤ 15 W Tj = 25 oC o Tj = 25 C Tj = 25 oC Tj = 25 oC ∆T eN SVR Vd Dropout Voltage Is c Short Circuit Current f = 120 Hz o Io = 1 A Tj = 25 C ∆VO = 100 mV 54 * 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. 6/13 L7900 ELECTRICAL CHARACTERISTICS FOR L7922C (refer to the test circuits, T j = 0 to 150 oC, Vi = -31V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit -21.1 -22 -22.9 V -20.9 -22 -23.1 V 440 220 mV mV 440 220 mV mV 3 mA 0.5 mA Vo Output Voltage Tj = 25 oC Vo Output Voltage Io = -5 mA to -1 A Vi = -26 to -37 V ∆V o * Line Regulation Vi = -25 to -37 V Vi = -28 to -34 V ∆V o * Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA Quiescent Current Tj = 25 C ∆I d Quiescent Current Change Io = 5 to 1000 mA ∆I d Quiescent Current Change Vi = -26 to -37 V 1 mA ∆ Vo Output Voltage Drift Io = 5 mA Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V Id Po ≤ 15 W Tj = 25 oC Tj = 25 oC Tj = 25 oC o Tj = 25 C o o -1.1 mV/ C 375 µV 60 dB 1.1 V 1.1 A ∆T eN SVR Vd Dropout Voltage Is c Short Circuit Current f = 120 Hz 54 o Io = 1 A Tj = 25 C ∆VO = 100 mV ELECTRICAL CHARACTERISTICS FOR L7924C (refer to the test circuits, T j = 0 to 150 oC, Vi = -33V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified) Symbol Parameter Test Conditions o Min. Typ. Max. Unit -23 -24 -25 V -22.8 -24 -25.2 V 480 240 mV mV 480 240 mV mV 3 mA Vo Output Voltage Vo Output Voltage Io = -5 mA to -1 A Vi = -27 to -38 V ∆V o * Line Regulation Vi = -27 to -38 V Vi = -30 to -36 V ∆V o * Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA Quiescent Current Tj = 25 oC ∆I d Quiescent Current Change Io = 5 to 1000 mA 0.5 mA ∆I d Quiescent Current Change Vi = -27 to -38 V 1 mA ∆ Vo Output Voltage Drift Io = 5 mA Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V Id Tj = 25 C Po ≤ 15 W Tj = 25 oC o Tj = 25 C Tj = 25 oC Tj = 25 oC -1 mV/ oC 400 µV 60 dB 1.1 V 1.1 A ∆T eN SVR Vd Dropout Voltage Is c Short Circuit Current f = 120 Hz o Io = 1 A Tj = 25 C ∆VO = 100 mV 54 * 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. 7/13 L7900 APPLICATION INFORMATION Figure 1 : Fixed Output Regulator. Figure 2 : Split Power Supply (± 15V/1A). Notes : 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 electrolitics 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. Against potential latch-up problems. Figure 3 : Circuit for Increasing Output Voltage. Figure 4 : High Current Negative Regulator (– 5V/4A with 5A current limiting). VO = V XX R1+R2 R2 V XX > 3I d 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. 8/13 L7900 TO-3 (R) MECHANICAL DATA mm DIM. MIN. A inch TYP. MAX. MIN. TYP. 11.7 B MAX. 0.460 0.96 1.10 0.037 0.043 C 1.70 0.066 D 8.7 0.342 E 20.0 0.787 G 10.9 0.429 N 16.9 0.665 P 26.2 R 3.88 1.031 4.09 U 0.152 39.50 V 1.555 30.10 1.185 A P D C O N B V E G U 0.161 R P003N 9/13 L7900 TO-220 MECHANICAL DATA mm DIM. MIN. TYP. A inch MAX. MIN. TYP. 4.8 C MAX. 0.189 1.37 0.054 D 2.4 2.8 0.094 0.110 D1 1.2 1.35 0.047 0.053 E 0.35 0.55 0.014 0.022 F 0.61 0.94 0.024 0.037 F2 1.15 1.4 0.045 0.055 G 4.95 5.21 0.195 5.08 H2 H3 0.200 10.4 10.05 L2 0.409 10.4 0.396 27.1 1.035 16.2 26.7 0.205 0.409 0.638 L3 26.3 1.051 1.067 L5 2.6 3 0.102 0.118 L6 15.1 15.8 0.594 0.622 L7 6 6.6 0.236 0.260 Dia. 3.65 3.85 0.144 0.152 P011D 10/13 L7900 TO-220FP 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 0.45 0.7 0.017 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 L3 0.630 28.6 30.6 1.126 1.204 9.8 10.6 0.385 0.417 L6 15.9 16.4 0.626 0.645 L7 9 9.3 0.354 0.366 Ø 3 3.2 0.118 0.126 B D A E L4 L3 L6 F F1 L7 F2 H G G1 ¯ 1 2 3 L2 L4 P011G4/B 11/13 L7900 TO-263 (D2PAK) MECHANICAL DATA mm DIM. MIN. inch TYP. MAX. MIN. TYP. MAX. A 4.4 4.6 0.173 0.181 A1 2.49 2.69 0.098 0.106 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 E 10 10.4 0.393 0.409 G 4.88 5.28 0.192 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 D C2 A2 A C DETAIL”A” DETAIL”A” A1 B2 E B G L2 L L3 P011P6/F 12/13 L7900 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 STMicroelectronic s. Specification 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 withoutexpress written approval of STMicroelectronics. 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