MC79xxCT Series Vishay New Product formerly General Semiconductor 3-Terminal Fixed Negative Voltage Regulators Pin Arrangement Description These voltage regulators are intended as complements to the popular MC78xx Series devices. These negative regulators are available in the same seven-voltage options as the MC78xx devices. In addition, one extra voltage option commonly employed in MECL systems is also available in the negative MC79xx Series. TO-220 1. Ground 3 2. Input 2 1 3. Output (heatsink connected to pin 2) Available in fixed output voltage options from –5.0 to –24 volts, these regulators employ current limiting, thermal shutdown, and safe-area compensation – making them remarkably rugged under most operating conditions. With adequate heatsinking they can deliver output currents in excess of 1.5 ampere. Standard Application Features Input Output MC79xx • Output current in excess of 1.5 Ampere • No external components required Co 0.1µF Cin 0.33µF • Internal thermal overload protection • Internal short-circuit current limiting • Output transistor safe-area compensation • Output voltage offered in 2% tolerance Notes: A common ground is required between the input and the output voltages. The input voltage must remain typically 2.0V more negative even during the high point on the input ripple voltage. Mechanical Data Case: TO-220 Package Weight: approx. 2.24g xx = these two digits of the part number indicate output voltage. Cin is required if regulator is located an appreciable distance from power supply filter. Case outline is on the back page Co improves stability and transient response. Internal Block Diagram GND R1 R2 Reference Voltage Output + Q1 -I1 I2 Q2 Short Circuit Protection RSC Input Document Number 74814 11-Jun-02 www.vishay.com 1 MC79xxCT Series Vishay formerly General Semiconductor Maximum Ratings Ratings at 25°C ambient temperature unless otherwise specified. Parameter Symbol Value Unit Vin –30 V Vin –40 V Power Dissipation PD 15 W Operating Junction Temperature Range TJ –20 to +150 °C Tstg –65 to +150 °C Input Voltage (1) Input Voltage (2) (3) Storage Junction Temperature Range Notes: (1) MC7905 to MC7918 (2) MC7924 (3) Follow the derating curve. When TJ exceeds 150°C, the internal circuit cuts off the output Electrical Characteristics – MC7905 Vin = –10V, Iout = 500mA, Cin = 2µF, Cout = 1µF; TJ = 0°C to 125°C, unless otherwise noted. Symbol Test Circuit Output Voltage Vo 1 Line Regulation (TJ = 25°C) ∆REG line 1 Load Regulation (TJ = 25°C) ∆REG load 1 Iq 2 Quiescent Current Change (TJ = 25°C) ∆Iq 2 Output Noise Voltage (TJ = 25°C) Vn Ripple Rejection Ratio RR Parameter Quiescent Current Dropout Voltage Peak Output Current Temp. Coefficient of Output Voltage Conditions Min. Typ. Max. TJ = 25°C –4.90 –5.0 –5.10 Vin = –7 to –20V, Io = 5mA to 1A –4.85 — –5.15 Vin = –7 to –25V — 3 100 Vin = –8 to –12V — 1 50 Io = 5mA to 1.5A — 10 100 Io = 250mA to 750mA — 3 50 TJ = 25°C — 2 4 Vin = –7 to –25V — — 1.3 Io = 5mA to 1A — — 0.5 1 f = 10Hz to 100KHz — 40 — µV 3 Vin = –8 to –18V Io = 100mA, f = 120Hz 62 74 — dB Io = 1.0A, TJ = 25°C — 1.1 — V Vdrop V mV mV mA mA Io-peak 1 TJ = 25°C — 2.1 — A ∆Vo/∆TA 1 Io = 5mA, TJ = 0 to125°C — –0.4 — mV/°C Note: Where the condition TJ = 25°C is specified, pulse testing (<10ms) with low duty cycle is required to maintain junction temperature stability. www.vishay.com 2 Unit 2 of 8 Document Number 74814 11-Jun-02 MC79xxCT Series Vishay formerly General Semiconductor Electrical Characteristics – MC7906 Vin = –11V, Iout = 500mA, Cin = 2µF, Cout = 1µF; TJ = 0°C to 125°C, unless otherwise noted. Symbol Test Circuit Output Voltage Vo 1 Line Regulation (TJ = 25°C) REG line 1 Load Regulation (TJ = 25°C) REG load 1 Iq 2 Quiescent Current Change (TJ = 25°C) ∆Iq 2 Output Noise Voltage (TJ = 25°C) Vn Ripple Rejection Ratio RR Parameter Quiescent Current Dropout Voltage Peak Output Current Temp. Coefficient of Output Voltage Conditions Min. Typ. Max. TJ = 25°C –5.88 –6.0 –6.12 Vin = –8 to –21V, Io = 5mA to 1A –5.82 — –6.18 Vin = –8 to –25V — 4 120 Vin = –9 to –13V — 1.5 60 Io = 5mA to 1.5A — 10 120 Io = 250mA to 750mA — 3 60 TJ = 25°C — 2 4 Vin = –8 to –25V — — 1.3 Io = 5mA to 1A — — 0.5 1 f = 10Hz to 100KHz — 44 — µV 3 Vin = –9 to –19V Io = 100mA, f = 120Hz 60 73 — dB Io = 1.0A, TJ = 25°C — 1.1 — V Vdrop Unit V mV mV mA mA Io-peak 1 TJ = 25°C — 2.1 — A ∆Vo/∆TA 1 Io = 5mA, TJ = 0 to125°C — –0.5 — mV/°C Unit Electrical Characteristics – MC7908 Vin = –14V, Iout = 500mA, Cin = 2µF, Cout = 1µF; TJ = 0°C to 125°C, unless otherwise noted. Parameter Symbol Test Circuit Conditions Min. Typ. Max. TJ = 25°C –7.84 –8.0 –8.16 Vin = –10.5 to –23V, Io = 5mA to 1A –7.76 — –8.24 Vin = –10.5 to –25V — 6 160 Vin = –11 to –15V — 2 80 Io = 5mA to 1.5A — 12 160 Io = 250mA to 750mA — 4 80 TJ = 25°C — 2.2 4.5 Vin = –10.5 to –25V — — 1 Io = 5mA to 1A — — 0.5 Output Voltage Vo 1 Line Regulation (TJ = 25°C) REG line 1 Load Regulation (TJ = 25°C) REG load 1 Iq 2 Quiescent Current Change (TJ = 25°C) ∆Iq 2 Output Noise Voltage (TJ = 25°C) Vn 1 f = 10Hz to 100KHz — 52 — µV Ripple Rejection Ratio RR 3 Vin = –11 to –21V Io = 100mA, f = 120Hz 56 71 — dB Io = 1.0A, TJ = 25°C — 1.1 — V Quiescent Current Dropout Voltage Peak Output Current Temp. Coefficient of Output Voltage Document Number 74814 11-Jun-02 Vdrop V mV mV mA mA Io-peak 1 TJ = 25°C — 2.1 — A ∆Vo/∆TA 1 Io = 5mA, TJ = 0 to125°C — –0.6 — mV/°C www.vishay.com 3 MC79xxCT Series Vishay formerly General Semiconductor Electrical Characteristics – MC7909 Vin = –15V, Iout = 500mA, Cin = 2µF, Cout = 1µF; TJ = 0°C to 125°C, unless otherwise noted. Symbol Test Circuit Output Voltage Vo 1 Line Regulation (TJ = 25°C) REG line 1 Load Regulation (TJ = 25°C) REG load 1 Iq 2 Quiescent Current Change (TJ = 25°C) ∆Iq 2 Output Noise Voltage (TJ = 25°C) Vn Ripple Rejection Ratio RR Parameter Quiescent Current Dropout Voltage Peak Output Current Temp. Coefficient of Output Voltage Conditions Min. Typ. Max. TJ = 25°C –8.82 –9.0 –9.18 Vin = –11.5 to –24V, Io = 5mA to 1A –8.73 — –9.27 Vin = –11.5 to –27V — 7 180 Vin = –12 to –16V — 2 90 Io = 5mA to 1.5A — 12 180 Io = 250mA to 750mA — 4 90 TJ = 25°C — 2.2 4.5 Vin = –11.5 to –27V — — 1 Io = 5mA to 1A — — 0.5 1 f = 10Hz to 100KHz — 58 — µV 3 Vin = –12 to –22V Io = 100mA, f = 120Hz 56 71 — dB Io = 1.0A, TJ = 25°C — 1.1 — V Vdrop Unit V mV mV mA mA Io-peak 1 TJ = 25°C — 2.1 — A ∆Vo/∆TA 1 Io = 5mA, TJ = 0 to125°C — 0.6 — mV/°C Unit Electrical Characteristics – MC7912 Vin = –19V, Iout = 500mA, Cin = 2µF, Cout = 1µF; TJ = 0°C to 125°C, unless otherwise noted. Symbol Test Circuit Output Voltage Vo 1 Line Regulation (TJ = 25°C) REG line 1 Load Regulation (TJ = 25°C) REG load 1 Iq 2 Quiescent Current Change (TJ = 25°C) ∆Iq 2 Output Noise Voltage (TJ = 25°C) Vn Ripple Rejection Ratio RR Parameter Quiescent Current Dropout Voltage Peak Output Current Temp. Coefficient of Output Voltage www.vishay.com 4 Conditions Min. Typ. Max. TJ = 25°C –11.76 –12.0 –12.24 Vin = –14.5 to –27V, Io = 5mA to 1A –11.64 — –12.36 Vin = –14.5 to –30V — 10 240 Vin = –15 to –19V — 3 120 Io = 5mA to 1.5A — 12 240 Io = 250mA to 750mA — 4 120 TJ = 25°C — 2.5 5 Vin = –14.5 to –30V — — 1 Io = 5mA to 1A — — 0.5 1 f = 10Hz to 100KHz — 75 — µV 3 Vin = –15 to –25V Io = 100mA, f = 120Hz 55 70 — dB Io = 1.0A, TJ = 25°C — 1.1 — V Vdrop V mV mV mA mA Io-peak 1 TJ = 25°C — 2.1 — A ∆Vo/∆TA 1 Io = 5mA, TJ = 0 to125°C — –0.8 — mV/°C Document Number 74814 11-Jun-02 MC79xxCT Series Vishay formerly General Semiconductor Electrical Characteristics – MC7915 Vin = –23V, Iout = 500mA, Cin = 2µF, Cout = 1µF; TJ = 0°C to 125°C, unless otherwise noted. Parameter Symbol Test Circuit Conditions Min. Typ. Max. TJ = 25°C –14.7 –15 –15.3 Vin = –17.5 to –30V, Io = 5mA to 1A –14.55 — –15.45 Vin = –17.5 to –30V — 11 300 Vin = –18 to –22V — 3 150 Io = 5mA to 1.5A — 12 300 Io = 250mA to 750mA — 4 150 TJ = 25°C — 2.5 5 Vin = –17.5 to –30V — — 1 Io = 5mA to 1A — — 0.5 Unit Output Voltage Vo 1 Line Regulation (TJ = 25°C) REG line 1 Load Regulation (TJ = 25°C) REG load 1 Iq 2 Quiescent Current Change (TJ = 25°C) ∆Iq 2 Output Noise Voltage (TJ = 25°C) Vn 1 f = 10Hz to 100KHz — 90 — µV Ripple Rejection Ratio RR 3 Vin = –18 to –28V Io = 100mA, f = 120Hz 54 69 — dB Io = 1.0A, TJ = 25°C — 1.1 — V Quiescent Current Dropout Voltage Peak Output Current Temp. Coefficient of Output Voltage Vdrop V mV mV mA mA Io-peak 1 TJ = 25°C — 2.1 — A ∆Vo/∆TA 1 Io = 5mA, TJ = 0 to125°C — 0.9 — mV/°C Unit Electrical Characteristics – MC7918 Vin = –27V, Iout = 500mA, Cin = 2µF, Cout = 1µF; TJ = 0°C to 125°C, unless otherwise noted. Parameter Symbol Test Circuit Conditions Min. Typ. Max. TJ = 25°C –17.64 –18.0 –18.36 Vin = –21 to –33V, Io = 5mA to 1A –17.46 — –18.54 Vin = –21 to –33V — 15 360 Vin = –22 to –26V — 5 180 Io = 5mA to 1.5A — 12 360 Io = 250mA to 750mA — 4 180 TJ = 25°C — 2.5 5 Vin = –21 to –33V — — 1 Io = 5mA to 1A — — 0.5 Output Voltage Vo 1 Line Regulation (TJ = 25°C) REG line 1 Load Regulation (TJ = 25°C) REG load 1 Iq 2 Quiescent Current Change (TJ = 25°C) ∆Iq 2 Output Noise Voltage (TJ = 25°C) Vn 1 f = 10Hz to 100KHz — 110 — µV Ripple Rejection Ratio RR 3 Vin = –21 to –31V Io = 100mA, f = 120Hz 53 68 — dB Io = 1.0A, TJ = 25°C — 1.1 — V Quiescent Current Dropout Voltage Peak Output Current Temp. Coefficient of Output Voltage Document Number 74814 11-Jun-02 Vdrop V mV mV mA mA Io-peak 1 TJ = 25°C — 2.1 — A ∆Vo/∆TA 1 Io = 5mA, TJ = 0 to125°C — –1 — mV/°C www.vishay.com 5 MC79xxCT Series Vishay formerly General Semiconductor Electrical Characteristics – MC7924 Vin = –33V, Iout = 500mA, Cin = 2µF, Cout = 1µF; TJ = 0°C to 125°C, unless otherwise noted. Symbol Test Circuit Output Voltage Vo 1 Line Regulation (TJ = 25°C) REG line 1 Load Regulation (TJ = 25°C) REG load 1 Iq 2 Quiescent Current Change (TJ = 25°C) ∆Iq 2 Output Noise Voltage (TJ = 25°C) Vn Ripple Rejection Ratio RR Parameter Quiescent Current Dropout Voltage Conditions Min. Typ. Max. TJ = 25°C –23.52 –24 –24.48 Vin = –26 to –38V, Io = 5mA to 1A –23.28 — –24.72 Vin = –26 to –38V — 18 480 Vin = –27 to –32V — 6 240 Io = 5mA to 1.5A — 12 480 Io = 250mA to 750mA — 4 240 TJ = 25°C — 3 5 Vin = –26 to –38V — — 1 Io = 5mA to 1A — — 0.5 1 f = 10Hz to 100KHz — 170 — µV 3 Vin = –26 to –36V Io = 100mA, f = 120Hz 50 65 — dB Io = 1.0A, TJ = 25°C — 1.1 — V Vdrop Peak Output Current Temp. Coefficient of Output Voltage MC79xx mV mA mA TJ = 25°C — 2.1 — A ∆Vo/∆TA 1 Io = 5mA, TJ = 0 to125°C — –1 — mV/°C Test Circuit 2 1 3 MC79xx A 3 2 1µF 1µF + V 2µF mV 1 2 + V Io-peak Test Circuit 1 1 Unit + + 2µF Io Io Test Circuit 3 1 MC79xx 3 2 + 2µF www.vishay.com 6 1µF + V Io Document Number 74814 11-Jun-02 MC79xxCT Series Vishay formerly General Semiconductor Ratings and Characteristic Curves (T A = 25°C unless otherwise noted) Fig. 1 – Power Dissipation vs. Ambient Temperature Fig. 2 – Quiescent Current 20 Infinite Heatsink θHS = 5°C/W IIB -- Input Bias Current (mA) PO -- Power Dissipation (W) 10 θHS = 15°C/W No Heatsink 1.0 θJC = 5°C/W θJA = 65°C/W PD(max) = 15W 0.1 25 75 100 125 0 150 50 75 100 125 TJ -- Junction Temperature (°C) Fig. 3 – Peak Output Current Fig. 4 –Ripple Rejection Ratio vs. Frequency 100 RR -- Ripple Rejection (db) Io -- Output Current (A) 25 TA -- Ambient Temperature (°C) 2.0 1.5 1.0 0.5 0 6.0 12 18 24 80 60 40 20 100 1.0K 10K Input -- Output Voltage Differential (V) f -- Frequency (HZ) Fig. 5 – Ripple Rejection vs. Output Voltage Fig. 6 – Output Voltage vs. Junction Temperature 100K 6.26 VO -- Output Voltage (-V) f = 120Hz Io = 20mA Vin = 1.0V(RMS) 70 60 50 40 4.0 Vin = --11V Vo = --6.0V Io = 20mA 0 10 30 80 RR -- Ripple Rejection (db) 1.9 1.8 50 2.5 0 Vin = -11V VO = -6.0V IO = 20mA 2.0 8.0 12 16 Vo -- Output Voltage (V) Document Number 74814 11-Jun-02 20 24 6.22 6.18 6.14 Vin = --11V Vo = --6.0V Io = 20mA 6.10 6.06 --25 0 25 50 75 100 125 150 175 TJ -- Junction Temperature (°C) www.vishay.com 7 MC79xxCT Series Vishay formerly General Semiconductor TO-220 Case Outline 10.25 ± 0.25 4.85 ± 0.375 1.27 ± 0.12 3.84 ± 0.6 Dia. 2.69 ± 0.25 6.26 ± 0.25 14.8 ± 0.51 8.54 ± 0.26 28.7 ± 0.92 3.94 ± 0.375 13.9 ± 0.41 2.53 ± 0.185 www.vishay.com 8 Dimensions in millimeters 1.3 ± 0.185 0.8 ± 0.12 0.387 ± 0.09 2.55 ± 0.375 Document Number 74814 11-Jun-02