MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE) 3-TERMINAL 1A NEGATIVE VOLTAGE REGULATORS The MC79XX series of three-terminal negative regulators are available in TO-220 package and with several fixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shut-down and safe area protection, making it essentially indestructible. TO-220 FEATURES • • • • • Output Current in Excess of 1A Output Voltages of -5, -6, -8, -12, -15, -18, -24V Internal Thermal Overload Protection Short Circuit Protection Output Transistor Safe-Area Compensation 1: GND 2: Input 3: Output ORDERING INFORMATION Device Output Voltage Tolerance MC79XXCT (LM79XXCT) (KA79XX) ± 4% KA79XXA ± 2% Package Operating Temperature TO-220 0 ~+125°C BLOCK DIAGRAM GND R1 VOLTAGE REFERENCE R2 Out + Q1 Q2 I1 I2 PROTECTION CIRCUITRY Rsc In Rev. C 1999 Fairchild Semiconductor Corporation MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE) ABSOLUTE MAXIMUM RATINGS (TA=+25°C, unless otherwise specified) Characteristic Symbol Value Unit VI -35 Thermal Resistance Junction-Cases Junction-Air Input Voltage RθJC 5 65 V °C / W °C /W Operating Temperature Range TOPR 0 ~ +125 °C Storage Temperature Range TSTG - 65 ~ +150 °C RθJA LM7905 ELECTRICAL CHARACTERISTICS (VI = 10V, lO = 500mA, 0°C ≤T J ≤ +125°C, CI =2.2µF, CO =1µF, unless otherwise specified.) Characteristic Output Voltage Line Regulation Symbol VO ∆VO Test Conditions TJ =+25°C IO = 5mA to 1A, PO 15W VI = -7 to -20V VI = -7 to -20V IO=1A TJ =25°C VI = -8 to -12V IO=1A VI = -7.5 to -25V Min Typ Max - 4.8 - 5.0 - 5.2 - 4.75 -5.0 - 5.25 5 50 2 25 7 50 7 50 10 100 3 50 mV 3 6 mA 0.05 0.1 - 0.4 0.5 0.8 mA VI= -8 to -12V IO=1A IO = 5mA to 1.5A Load Regulation Quiescent Current Quiescent Current Change Temperature Coefficient of VD ∆VO IQ ∆IQ ∆VO/∆T TJ =+25°C IO = 250 to 750mA TJ =+25°C IO = 5mA to 1A VI = -8 to -25V IO = 5mA Short Circuit Current ISC f = 10Hz to 100KHz TA =+25°C f = 120Hz, IO = -35V ∆VI = 10V TJ=+25°C IO = 1A TJ =+25°C, VI = -35V Peak Current IPK TJ =+25°C Output Noise Voltage VN Ripple Rejection RR Dropout Voltage VD 54 Unit V mV mV/°C 40 µV 60 dB 2 V 300 mA 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 is used. MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE) LM7906 ELECTRICAL CHARACTERISTICS (VI = 11V, lO = 500mA, 0°C ≤T J≤ +125°C, CI =2.2µF, CO = 1µF, unless otherwise specified.) Characteristic Symbol Output Voltage VO Line Regulation ∆VO Load Regulation Quiescent Current Quiescent Current Change Temperature Coefficient of VD ∆VO IQ ∆IQ ∆VO/∆T Test Conditions TJ = +25°C IO = 5mA to 1A, PO 15W VI = - 9 to - 21V VI = - 8 to - 25V TJ = 25°C VI= - 9 to -12V Min Typ Max - 5.75 -6 - 6.25 - 5.7 -6 - 6.3 10 5 120 60 10 120 3 60 TJ =+ 25°C IO = 5mA to 1.5A TJ =+ 25°C IO = 250 to 750mA TJ =+ 25°C IO = 5mA to 1A VI = -9 to -25V IO = 5mA Output Noise Voltage VN Ripple Rejection RR Dropout Voltage VD Short Circuit Current ISC f = 10Hz to 100KHz TA =+ 25°C f = 120Hz ∆VI = 10V TJ=+ 25°C IO = 1A TJ= +25°C, VI = -35V Peak Current IPK TJ= +25°C Unit V mV mV 3 54 6 mA 0.5 1.3 mA -0.5 mV/°C 130 µV 60 dB 2 V 300 mA 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 is used. MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE) LM7908 ELECTRICAL CHARACTERISTICS (VI = 14V, lO = 500mA, 0°C ≤T J ≤ +125°C, CI =2.2µF, CO = 1µF, unless otherwise specified.) Characteristic Output Voltage Line Regulation Load Regulation Symbol VO ∆VO ∆VO Quiescent Current IQ Quiescent Current Change ∆IQ Temperature Coefficient of VD ∆VO/∆T Test Conditions TJ =+ 25°C IO = 5mA to 1A, PO 15W VI = -1.5 to -23V VI = -10.5 to -25V TJ = 25°C VI= -11 to -17V Min Typ Max - 7.7 -8 - 8.3 - 7.6 -8 - 8.4 10 5 100 80 12 160 4 80 TJ =+ 25°C IO = 5mA to 1.5A TJ =+ 25°C IO = 250 to 750mA TJ =+ 25°C IO = 5mA to 1A VI = -11.5 to -25V IO = 5mA Output Noise Voltage VN Ripple Rejection RR Dropout Voltage VD Short Circuit Current ISC f = 10Hz to 100KHz TA =+ 25°C f = 120Hz ∆VI = 10V TJ=+ 25°C IO = 1A TJ=+ 25°C, VI = -35V Peak Current IPK TJ=+ 25°C Unit V mV mV 54 3 6 mA 0.05 0.1 -0.6 0.5 1 mA mV/°C 175 µV 60 dB 2 V 300 mA 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 is used. MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE) LM7909 ELECTRICAL CHARACTERISTICS (VI = 14V, lO = 500mA, 0°C ≤T J ≤+ 125°C, CI =2.2µF, CO = 1µF, unless otherwise specified) Characteristic Output Voltage Line Regulation Load Regulation Symbol VO ∆VO ∆VO Quiescent Current IQ Quiescent Current Change ∆IQ Temperature Coefficient of VD ∆VO/∆T Test Conditions Min Typ Max - 8.7 - 9.0 - 9.3 - 8.6 - 9.0 - 9.4 10 5 180 90 TJ =+ 25°C IO = 5mA to 1.5A 12 180 TJ =+ 25°C IO = 250 to 750mA 4 90 TJ =+ 25°C IO = 5mA to 1A, PO 15W VI = -1.5 to -23V VI = -10.5 to -25V TJ = 25°C VI= -11 to -17V V mV mV TJ =+ 25°C IO = 5mA to 1A VI = -11.5 to -25V IO = 5mA f = 10Hz to 100KHz TA =+ 25°C f = 120Hz ∆VI = 10V Unit 3 6 mA 0.05 0.1 -0.6 0.5 1 mA mV/°C 175 µV 60 dB 2 V TJ= +25°C, VI = -35V 300 mA TJ =+25°C 2.2 A Output Noise Voltage VN Ripple Rejection RR Dropout Voltage VD TJ=+ 25°C IO = 1A Short Circuit Current ISC Peak Current IPK 54 * 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 is used. MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE) LM7912 ELECTRICAL CHARACTERISTICS (VI= 18V, lO =500mA, 0°C ≤T J≤ +125°C, CI =2.2µF, CO = 1µF, unless otherwise specified.) Characteristic Output Voltage Symbol VO Line Regulation ∆VO Load Regulation ∆VO Quiescent Current Quiescent Current Change Temperature Coefficient of VD IQ ∆IQ ∆VO/∆T Output Noise Voltage VN Ripple Rejection RR Dropout Voltage VD Short Circuit Current Peak Current ISC IPK Test Conditions TJ = +25°C IO = 5mA to 1A, PO 15W VI = -15.5 to -27V V = -14.5 to -30V TJ = 25°C I VI= -16 to -22V TJ =+ 25°C IO = 5mA to 1.5A TJ =+ 25°C IO = 250 to 750mA TJ =+ 25°C IO = 5mA to 1A VI = -15 to -30V IO = 5mA f = 10Hz to 100KHz TA =+ 25°C f = 120Hz ∆VI = 10V TJ= +25°C IO = 1A TJ=+ 25°C, VI = -35V TJ=+ 25°C Min Typ Max -11.5 -12 -12.5 -11.4 -12 -12.6 12 6 240 120 12 240 4 120 3 0.05 0.1 -0.8 6 0.5 1 Unit V mV mV 54 mA mA mV/°C 200 µV 60 dB 2 V 300 2.2 mA 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 is used. MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE) LM7915 ELECTRICAL CHARACTERISTICS (VI = 23V, IO = 500mA, 0°C ≤T J +125°C, CI =2.2µF, CO = 1µF, unless otherwise specified.) Characteristic Symbol Output Voltage VO Line Regulation ∆VO Load Regulation ∆VO Quiescent Current IQ Quiescent Current Change ∆IQ Temperature Coefficient of VD ∆VO/∆T Output Noise Voltage VN Ripple Rejection RR Dropout Voltage VD Short Circuit Current Peak Current ISC IPK Test Conditions TJ =+ 25°C IO = 5mA to 1A, PO 15W VI = -18 to -30V VI = -17.5 to -30V TJ = 25°C VI= -20 to -26V TJ =+ 25°C IO = 5mA to 1.5A TJ =+ 25°C IO = 250 to 750mA TJ =+ 25°C IO = 5mA to 1A VI = -18.5 to -30V IO = 5mA f = 10Hz to 100Khz TA =+ 25°C f = 120Hz ∆VI = 10V TJ=+25°C IO = 1A TJ=+ 25°C, VI = -35V TJ=+ 25°C Min Typ Max -14.4 -15 -15.6 -14.25 -15 -15.75 12 6 300 150 12 300 4 150 3 0.05 0.1 -0.9 6 0.5 1 Unit V mV mV 54 mA mA mV/°C 250 µV 60 dB 2 V 300 2.2 mA 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 is used. MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE) LM7918 ELECTRICAL CHARACTERISTICS (VI = 27V, lO = 500mA, 0°C ≤T J ≤+125°C, CI =2.2µF, CO = 1µF, unless otherwise specified.) Characteristic Output Voltage Symbol VO Line Regulation ∆VO Load Regulation ∆VO Quiescent Current Quiescent Current Change Temperature Coefficient of VD IQ ∆IQ ∆VO/∆T Output Noise Voltage VN Ripple Rejection RR Dropout Voltage VD Short Circuit Current Peak Current ISC IPK Test Conditions TJ =+ 25°C IO = 5mA to 1A, PO 15W VI = -22.5 to -33V TJ = 25°C VI= -21 to -33V VI= -24 to -30V TJ =+ 25°C IO = 5mA to 1.5A TJ =+ 25°C IO = 250 to 750mA TJ =+ 25°C IO = 5mA to 1A VI = -22 to -33V IO = 5mA f = 10Hz to 100KHz TA =+ 25°C f = 120Hz ∆VI = 10V TJ=+ 25°C IO = 1A TJ=+ 25°C, VI = -35V TJ=+ 25°C Min Typ Max -17.3 -18 -18.7 -17.1 -18 -18.9 15 8 360 180 15 360 5 180 3 6 0.5 1 Unit V mV mV 54 mA mA -1 mV/°C 300 µV 60 dB 2 V 300 2.2 mA 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 is used. MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE) LM7924 ELECTRICAL CHARACTERISTICS (VI = 33V, lO = 500mA, 0°C ≤T J ≤+125°C, CI =2.2µF, CO = 1µF, unless otherwise specified.) Characteristic Symbol Output Voltage VO Line Regulation ∆VO Load Regulation ∆VO Quiescent Current Quiescent Current Change Temperature Coefficient of VD IQ ∆IQ ∆VO/∆T Output Noise Voltage VN Ripple Rejection RR Dropout Voltage VD Short Circuit Current Peak Current ISC IPK Test Conditions TJ =+25°C IO = 5mA to 1A, PO ≤15W VI = -27 to -38V VI = - 27 to - 38V TJ = 25°C VI= - 30 to - 36V TJ = +25°C IO = 5mA to 1.5A TJ =+ 25°C IO = 250 to 750mA TJ =+ 25°C IO = 5mA to 1A VI = -27 to -38V IO = 5mA f = 10Hz to 100KHz TA =+ 25°C f = 120Hz ∆VI = 10V TJ= +25°C IO = 1A TJ=+ 25°C, VI = -35V TJ=+25°C Min Typ Max - 23 - 24 - 25 - 22.8 - 24 - 25.2 15 8 480 180 15 480 5 240 3 6 0.5 1 Unit V mV mV 54 mA mA -1 mV/°C 400 µV 60 dB 2 V 300 2.2 mA 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 is used. MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE) LM7905A ELECTRICAL CHARACTERISTICS (VI = 10V, lO = 500mA, 0°C ≤T J ≤ +125°C, CI =2.2µF, CO =1µF, unless otherwise specified.) Characteristic Output Voltage Line Regulation Symbol VO ∆VO Test Conditions TJ =+ 25°C IO = 5mA to 1A, PO 15W VI = -7 to -20V VI = -7 to -20V IO=1A TJ =+25°C VI = -8 to -12V IO=1A VI = -7.5 to -25V Min Typ Max - 4.9 - 5.0 - 5.1 - 4.8 -5.0 - 5.2 5 50 2 25 7 50 7 50 10 100 3 50 mV 3 6 mA 0.05 0.1 - 0.4 0.5 0.8 mA VI= -8 to -12V IO=1A IO = 5mA to 1.5A Load Regulation ∆VO Quiescent Current IQ Quiescent Current Change ∆IQ Temperature Coefficient of VD ∆VO/∆T TJ =+ 25°C IO = 250 to 750mA TJ = +25°C IO = 5mA to 1A VI = -8 to -25V IO = 5mA Output Noise Voltage VN Ripple Rejection RR Dropout Voltage VD Short Circuit Current ISC f = 10Hz to 100KHz TA =+ 25°C f = 120Hz, IO = -35V ∆VI = 10V TJ=+ 25°C IO = 1A TJ =+ 25°C, VI = -35V Peak Current IPK TJ =+ 25°C 54 Unit V mV mV/°C 40 µV 60 dB 2 V 300 mA 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 is used. MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE) LM7912A ELECTRICAL CHARACTERISTICS (VI= 18V, lO =500mA, 0°C ≤T J≤ +125°C, CI =2.2µF, CO = 1µF, unless otherwise specified.) Characteristic Output Voltage Symbol VO Line Regulation ∆VO Load Regulation ∆VO Quiescent Current Quiescent Current Change Temperature Coefficient of VD IQ ∆IQ ∆VO/∆T Output Noise Voltage VN Ripple Rejection RR Dropout Voltage VD Short Circuit Current Peak Current ISC IPK Test Conditions TJ =+ 25°C IO = 5mA to 1A, PO 15W VI = -15.5 to -27V V = -14.5 to -30V TJ =+25°C I VI= -16 to -22V TJ = +25°C IO = 5mA to 1.5A TJ =+ 25°C IO = 250 to 750mA TJ =+ 25°C IO = 5mA to 1A VI = -15 to -30V IO = 5mA f = 10Hz to 100Khz TA =+ 25°C f = 120Hz ∆VI = 10V TJ=+ 25°C IO = 1A TJ=+ 25°C, VI = -35V TJ=+ 25°C Min Typ Max -11.75 -12 -12.25 -11.5 -12 -12.5 12 6 240 120 12 240 4 120 3 0.05 0.1 -0.8 6 0.5 1 Unit V mV mV 54 mA mA mV/°C 200 µV 60 dB 2 V 300 2.2 mA 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 is used. MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE) LM7915A ELECTRICAL CHARACTERISTICS (VI = 23V, lO = 500mA, 0°C ≤T J≤ +125°C, CI =2.2µF, CO = 1µF, unless otherwise specified.) Characteristic Symbol Output Voltage VO Line Regulation ∆VO Load Regulation ∆VO Quiescent Current IQ Quiescent Current Change ∆IQ Temperature Coefficient of VD ∆VO/∆T Output Noise Voltage VN Ripple Rejection RR Dropout Voltage VD Short Circuit Current Peak Current ISC IPK Test Conditions TJ = +25°C IO = 5mA to 1A, PO 15W VI = -18 to -30V TJ =+25°C VI = -17.5 to -30V VI= -20 to -26V TJ =+ 25°C IO = 5mA to 1.5A TJ =+ 25°C IO = 250 to 750mA TJ =+ 25°C IO = 5mA to 1A VI = -18.5 to -30V IO = 5mA f = 10Hz to 100KHz TA =+25°C f = 120Hz ∆VI = 10V TJ= +25°C IO = 1A TJ=+ 25°C, VI = -35V TJ=+ 25°C Min Typ Max -14.7 -15 -15.3 -14.4 -15 -15.6 12 6 300 150 12 300 4 150 3 0.05 0.1 -0.9 6 0.5 1 Unit V mV mV 54 mA mA mV/°C 250 µV 60 dB 2 V 300 2.2 mA 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 is used. MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE) TYPICAL PERFORMANCE CHARACTERISTICS Fig.1 Output Voltage Fig. 2 Load Regulation 15 Vin=10V Io=40mA 5.05 13 Load Regulation [mV] Output Voltage [-V] 5.1 5 4.95 4.9 Vin=25V Io=100mA 4.85 Io=1.5A 11 9 7 5 3 1 Io=0.75A -1 -3 4.8 -5 -25 0 25 50 75 100 125 -40 -25 0 25 50 75 100 TA, Ambient Temperature [ oC] TA, Ambient Temperature [ oC] Fig.3 Quiescent Current Fig. 4 Dropout Voltage 5 4 4.5 4 3.5 Dropout Voltage [V] Quiescent Current [mA] -40 3.5 3 2.5 2 1.5 1 0.5 125 3 2.5 2 1.5 Io=1A 1 0.5 0 0 -40 -25 0 25 50 75 100 125 TA, Ambient Temperature [oC] Short Circuit Current [A] 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 -0.05 -0.1 -25 0 25 50 75 -25 0 25 50 75 100 TA, Ambient Temperature [oC] Fig.5 Short Circuit Current -40 -40 100 TA, Ambient Temperature [oC] 125 125 MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE) TYPICAL APPLICATIONS Fig. 6 Negative Fixed output regulator µF + 2.2µ µF + 1µ CO 1 CI 2 - VI 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 aluminum electronics are used, at least ten times value shown should be selected. CI 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 (1N400l or similar) should be introduced to protect the device from momentary input short circuit. KA79XX 3 - VO Fig. 7 Split power supply (± ± 12V/1A) 1 + 15V KA7812 3 + 0.33µ µF 2 1µ µF 1µ µF + 1 2 1N4001 * GND µF + 2.2µ - 15V +12V + KA7912 3 *: Against potential latch-up problems. 1N4001 * -12V TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. ACEx™ CoolFET™ CROSSVOLT™ E2CMOS™ FACT™ FACT Quiet Series™ FAST® FASTr™ GTO™ HiSeC™ ISOPLANAR™ MICROWIRE™ POP™ PowerTrench® QFET™ QS™ Quiet Series™ SuperSOT™-3 SuperSOT™-6 SuperSOT™-8 TinyLogic™ UHC™ VCX™ DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Product Status Definition Advance Information Formative or In Design This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. Preliminary First Production This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. No Identification Needed Full Production This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. Obsolete Not In Production This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only.