L7900AC SERIES 2% NEGATIVE VOLTAGE REGULATORS ■ ■ ■ ■ ■ OUTPUT CURRENT UP TO 1.5 A OUTPUT VOLTAGES OF -5; -5.2; -6; -8; -12; -15; -18; -20; -22; -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. 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. 3 1 D2PAK TO-220 SCHEMATIC DIAGRAM November 1999 1/11 L7900AC 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 125 o C - 65 to 150 o C THERMAL DATA Symbol 2 Parameter R thj- ca se Thermal Resistance Junction-case R thj- amb Thermal Resistance Junction-ambient Max Max D PAK TO-220 3 62.5 3 50 Unit o o CONNECTION DIAGRAM AND ORDERING NUMBERS (top view) 2 TO-220 Type L7905AC L7952AC L7906AC L7908AC L7912AC L7915AC L7918AC L7920AC L7922AC L7924AC D PAK TO-220 L7905ACV L7952ACV L7906ACV L7908ACV L7912ACV L7915ACV L7918ACV L7920ACV L7922ACV L7924ACV (*) AVAILABLE IN TAPE AND REEL WITH ”-TR” SUFFIX APPLICATION CIRCUIT 2/11 D 2PAK (*) L7905ACD2T L7952ACD2T L7906ACD2T L7908ACD2T L7912ACD2T L7915ACD2T L7918ACD2T L7920ACD2T L7922ACD2T L7924ACD2T Output Voltage -5V -5.2V -6V -8V -12V -15V -18V -20V -22V -24V C/W C/W L7900AC ELECTRICAL CHARACTERISTICS FOR L7905A (refer to the test circuits, T j = 0 to 125 oC, 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 = 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 Id Po ≤ 15 W Unit -5.1 V -4.8 -5 -5.2 V 100 50 mV mV 100 50 mV mV 3 mA 0.5 mA o o Quiescent Current Change Vi = -8 to -25 V Output Voltage Drift Io = 5 mA eN Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V Vd Dropout Voltage Io = 1 A Tj = 25 C ∆VO = 100 mV Is c Short Circuit Current Short Circuit Peak Current Max. -5 Tj = 25 C Tj = 25 oC ∆I d I scp Typ. -4.9 Tj = 25 oC Tj = 25 oC ∆ Vo ∆T SVR Min. 1.3 f = 120 Hz 54 o o Tj = 25 C mA mV/ oC -0.4 100 µV 60 dB 1.4 V 2.1 A 2.5 A ELECTRICAL CHARACTERISTICS FOR L7952A (refer to the test circuits, T j = 0 to 125 oC, 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 ∆V o * Line Regulation Vi = -8 to -25 V Vi = -9 to -13 V ∆V o * Load Regulation Io = 5 to 1500 mA Io = 250 to 750 mA Quiescent Current Tj = 25 C Id Po ≤ 15 W Min. Typ. Max. Unit -5.1 -5.2 -5.3 V -5 -5.2 -5.4 V 105 52 mV mV 105 52 mV mV 3 mA o Tj = 25 C Tj = 25 oC Tj = 25 oC Tj = 25 oC o ∆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 ∆T Output Voltage Drift Io = 5 mA -0.5 mV/ oC eN Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC 125 µV Supply Voltage Rejection ∆Vi = 10 V 60 dB Io = 1 A Tj = 25 C ∆VO = 100 mV 1.4 V 2.1 A Tj = 25 oC 2.5 A SVR Vd Dropout Voltage Is c Short Circuit Current I scp Short Circuit Peak Current f = 120 Hz o 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. 3/11 L7900AC ELECTRICAL CHARACTERISTICS FOR L7906A (refer to the test circuits, T j = 0 to 125 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 C -5.88 -6 -6.12 V Vo Output Voltage Io = -5 mA to -1 A Po ≤ 15 W Vi = -9.5 to -21.5 V -5.76 -6 -6.24 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 o 120 60 mV mV Quiescent Current Tj = 25 C 3 mA ∆I d Quiescent Current Change Io = 5 to 1000 mA 0.5 mA Id Parameter Test Conditions o Tj = 25 C Tj = 25 oC o ∆I d Quiescent Current Change Vi = -9.5 to -25 V ∆ Vo ∆T Output Voltage Drift Io = 5 mA eN Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V Vd Dropout Voltage Io = 1 A Tj = 25 C ∆VO = 100 mV Is c Short Circuit Current SVR I scp Short Circuit Peak Current 1.3 f = 120 Hz 54 o o Tj = 25 C mA mV/ oC -0.6 144 µV 60 dB 1.4 V 2 A 2.5 A ELECTRICAL CHARACTERISTICS FOR L7908A (refer to the test circuits, T j = 0 to 125 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 -7.84 -8 -8.16 V Vo Output Voltage Io = -5 mA to -1 A Po ≤ 15 W Vi = -11.5 to -23 V -7.68 -8 -8.32 V ∆V o * Line Regulation Vi = -10.5 to -25 V Tj = 25 C Vi = -11 to -17 V Tj = 25 oC 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 C 3 mA Id o Tj = 25 oC Tj = 25 oC o ∆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 mA ∆ Vo ∆T Output Voltage Drift Io = 5 mA -0.6 mV/ oC eN Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC 175 µV Supply Voltage Rejection ∆Vi = 10 V 60 dB Io = 1 A Tj = 25 C ∆VO = 100 mV 1.1 V 1.5 A Tj = 25 oC 2.5 A SVR Vd Dropout Voltage Is c Short Circuit Current I scp Short Circuit Peak Current f = 120 Hz o 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. 4/11 L7900AC ELECTRICAL CHARACTERISTICS FOR L7912A (refer to the test circuits, T j = 0 to 125 oC, Vi = -19V, 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 Po ≤ 15 W Vi = -15.5 to -27 V ∆V o * Line Regulation Vi = -14.5 to -30 V Tj = 25 oC Vi = -16 to -22 V Tj = 25 oC ∆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 Id Unit -12.25 V -11.5 -12 -12.5 V 240 120 mV mV 240 120 mV mV 3 mA 0.5 mA o Quiescent Current Change Vi = -15 to -25 V Output Voltage Drift Io = 5 mA eN Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V Vd Dropout Voltage Io = 1 A Tj = 25 C ∆VO = 100 mV Is c Short Circuit Current Short Circuit Peak Current Max. -12 o ∆I d I scp Typ. Tj = 25 C Tj = 25 oC ∆ Vo ∆T SVR Min. -11.75 1 f = 120 Hz 54 o o Tj = 25 C mA mV/ oC -0.8 200 µV 60 dB 1.1 V 1.5 A 2.5 A ELECTRICAL CHARACTERISTICS FOR L7915A (refer to the test circuits, T j = 0 to 125 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 -14.7 -15 -15.3 V Vo Output Voltage Io = -5 mA to -1 A Po ≤ 15 W Vi = -18.5 to -30 V -14.4 -15 -15.6 V ∆V o * Line Regulation Vi = -17.5 to -30 V Tj = 25 C Vi = -20 to -26 V Tj = 25 oC 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 C 3 mA Id o Tj = 25 oC Tj = 25 oC o ∆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 ∆T Output Voltage Drift Io = 5 mA -0.9 mV/ oC eN Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC 250 µV Supply Voltage Rejection ∆Vi = 10 V 60 dB Io = 1 A Tj = 25 C ∆VO = 100 mV 1.1 V 1.3 A Tj = 25 oC 2.3 A SVR Vd Dropout Voltage Is c Short Circuit Current I scp Short Circuit Peak Current f = 120 Hz o 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. 5/11 L7900AC ELECTRICAL CHARACTERISTICS FOR L7918A (refer to the test circuits, T j = 0 to 125 oC, Vi = -27V, 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 = -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 Id Po ≤ 15 W Unit -18.36 V -17.3 -18 -18.7 V 360 180 mV mV 360 180 mV mV 3 mA 0.5 mA o o Quiescent Current Change Vi = -22 to -33 V Output Voltage Drift Io = 5 mA eN Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V Vd Dropout Voltage Io = 1 A Tj = 25 C ∆VO = 100 mV Is c Short Circuit Current Short Circuit Peak Current Max. -18 Tj = 25 C Tj = 25 oC ∆I d I scp Typ. Tj = 25 oC Tj = 25 oC ∆ Vo ∆T SVR Min. -17.64 1 f = 120 Hz 54 o o Tj = 25 C mA mV/ oC -1 300 µV 60 dB 1.1 V 1.1 A 2.2 A ELECTRICAL CHARACTERISTICS FOR L7920A (refer to the test circuits, T j = 0 to 125 oC, Vi = -29V, 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 = -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 C Id Min. Typ. Max. -19.6 -20 -20.4 V -19.2 -20 -20.8 V o 400 200 mV mV Tj = 25 oC Tj = 25 oC 400 200 mV mV 3 mA o Po ≤ 15 W Tj = 25 C Tj = 25 oC o Unit ∆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 ∆T Output Voltage Drift Io = 5 mA -1.1 mV/ oC eN Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC 350 µV Supply Voltage Rejection ∆Vi = 10 V 60 dB Io = 1 A Tj = 25 C ∆VO = 100 mV 1.1 V 0.9 A Tj = 25 oC 2.2 A SVR Vd Dropout Voltage Is c Short Circuit Current I scp Short Circuit Peak Current f = 120 Hz o 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. 6/11 L7900AC ELECTRICAL CHARACTERISTICS FOR L7922A (refer to the test circuits, T j = 0 to 125 oC, Vi = -31V, 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 = -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 Id Po ≤ 15 W Unit -22.4 V -21.1 -22 -22.8 V 440 220 mV mV 440 220 mV mV 3 mA 0.5 mA o o Quiescent Current Change Vi = -26 to -37 V Output Voltage Drift Io = 5 mA eN Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V Vd Dropout Voltage Io = 1 A Tj = 25 C ∆VO = 100 mV Is c Short Circuit Current Short Circuit Peak Current Max. -22 Tj = 25 C Tj = 25 oC ∆I d I scp Typ. Tj = 25 oC Tj = 25 oC ∆ Vo ∆T SVR Min. -21.5 1 f = 120 Hz 54 o o Tj = 25 C mA mV/ oC -1.1 375 µV 60 dB 1.1 V 1.1 A 2.2 A ELECTRICAL CHARACTERISTICS FOR L7924A (refer to the test circuits, T j = 0 to 125 oC, Vi = -33V, 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 = -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 C Id Min. Typ. Max. -23.5 -24 -24.5 V -23 -24 -25 V o 480 240 mV mV Tj = 25 oC Tj = 25 oC 480 240 mV mV 3 mA o Po ≤ 15 W Tj = 25 C Tj = 25 oC o Unit ∆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 ∆T Output Voltage Drift Io = 5 mA eN Output Noise Voltage B = 10Hz to 100KHz Tj = 25 oC Supply Voltage Rejection ∆Vi = 10 V SVR Vd Dropout Voltage Is c Short Circuit Current I scp Short Circuit Peak Current -1 mV/ oC 400 µV 60 dB Io = 1 A Tj = 25 C ∆VO = 100 mV 1.1 V 1.1 A Tj = 25 oC 2.2 A f = 120 Hz o 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. 7/11 L7900AC 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. 8/11 L7900AC 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 9/11 L7900AC 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 10/11 L7900AC Information furnished is believed to be accurate and reliable. However, STMicroelectronic s 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. 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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