LM79XX

LM79XX/A (KA79XX, MC79XX) FIXED VOLTAGE REGULATOR (NEGATIVE) 3-TERMINAL 1A NEGATIVE VOLTAGE REGULATORS The LM79XX 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 LM79XXCT LM79XXAT Output Voltage Tolerance ± 4% ± 2% Package TO-220 Operating Temperature 0 ~ +125 °C BLOCK DIAGRAM GND R1 VOLTAGE REFERENCE R2 Out + Q1 Q2 PROTECTION CIRCUITRY Rsc I1 I2 In Rev. B © 1999 Fairchild Semiconductor Corporation LM79XX/A (KA79XX, MC79XX) FIXED VOLTAGE REGULATOR (NEGATIVE) ABSOLUTE MAXIMUM RATINGS (TA=+25°C, unless otherwise specified) Characteristic Input Voltage Thermal Resistance Junction-Cases Junction-Air Operating Temperature Range Storage Temperature Range Symbol VI RθJC RθJA TOPR TSTG Value -35 5 65 0 ~ +125 - 65 ~ +150 Unit V °C / W °C /W °C °C LM7905 ELECTRICAL CHARACTERISTICS (VI = 10V, lO = 500mA, 0°C ≤T J ≤ +125°C, CI =2.2µF, CO =1µF, unless otherwise specified.) Characteristic Output Voltage Symbol 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 VI= -8 to -12V IO=1A IO = 5mA to 1.5A Load Regulation Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current ∆VO IQ ∆IQ ∆VO/∆T VN RR VD ISC IPK TJ =+25°C IO = 250 to 750mA TJ =+25°C IO = 5mA to 1A VI = -8 to -25V IO = 5mA f = 10Hz to 100KHz TA =+25°C f = 120Hz, IO = -35V ∆VI = 10V TJ=+25°C IO = 1A TJ =+25°C, VI = -35V TJ =+25°C Min - 4.8 - 4.75 Typ - 5.0 -5.0 5 2 7 7 10 3 3 0.05 0.1 - 0.4 40 54 60 2 300 2.2 Max - 5.2 - 5.25 50 25 50 50 100 50 6 0.5 0.8 mV mA mA mV/°C µV dB V mA A V Unit mV Line Regulation ∆VO * 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. LM79XX/A (KA79XX, MC79XX) FIXED VOLTAGE REGULATOR (NEGATIVE) LM7906 ELECTRICAL CHARACTERISTICS Characteristic Output Voltage Symbol VO ∆VO (VI = 11V, lO = 500mA, 0°C ≤T J≤ +125°C, CI =2.2µF, CO = 1µF, unless otherwise specified.) 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 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 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 - 5.75 - 5.7 Typ -6 -6 10 5 10 3 3 Max - 6.25 - 6.3 120 60 120 mV 60 6 0.5 1.3 -0.5 130 54 60 2 300 2.2 mA mA mV/°C µV dB V mA A V mV Unit Line Regulation Load Regulation ∆VO IQ ∆IQ ∆VO/∆T VN RR VD ISC IPK Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current * 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. LM79XX/A (KA79XX, MC79XX) FIXED VOLTAGE REGULATOR (NEGATIVE) LM7908 ELECTRICAL CHARACTERISTICS Characteristic Output Voltage Line Regulation Symbol VO ∆VO (VI = 14V, lO = 500mA, 0°C ≤T J ≤ +125°C, CI =2.2µF, CO = 1µF, unless otherwise specified.) 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 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 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 - 7.7 - 7.6 Typ -8 -8 10 5 12 4 3 0.05 0.1 -0.6 175 54 60 2 300 2.2 Max - 8.3 - 8.4 100 80 160 mV 80 6 0.5 1 mA mA mV/°C µV dB V mA A V Unit mV Load Regulation Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current ∆VO IQ ∆IQ ∆VO/∆T VN RR VD ISC IPK * 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. LM79XX/A (KA79XX, MC79XX) FIXED VOLTAGE REGULATOR (NEGATIVE) LM7909 ELECTRICAL CHARACTERISTICS Characteristic Output Voltage Line Regulation Symbol VO ∆VO (VI = 14V, lO = 500mA, 0°C ≤T J ≤+ 125°C, CI =2.2µF, CO = 1µF, unless otherwise specified) 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 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 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 - 8.7 - 8.6 Typ - 9.0 - 9.0 10 5 12 4 3 0.05 0.1 -0.6 175 54 60 2 300 2.2 Max - 9.3 - 9.4 180 90 180 mV 90 6 0.5 1 mA mA mV/°C µV dB V mA A V Unit mV Load Regulation Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current ∆VO IQ ∆IQ ∆VO/∆T VN RR VD ISC IPK * 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. LM79XX/A (KA79XX, MC79XX) FIXED VOLTAGE REGULATOR (NEGATIVE) LM7912 ELECTRICAL CHARACTERISTICS Characteristic Output Voltage Line Regulation Symbol VO ∆VO (VI= 18V, lO =500mA, 0°C ≤T J≤ +125°C, CI =2.2µF, CO = 1µF, unless otherwise specified.) 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 -11.5 -11.4 Typ -12 -12 12 6 12 4 3 0.05 0.1 -0.8 200 54 60 2 300 2.2 Max -12.5 -12.6 240 120 240 mV 120 6 0.5 1 mA mA mV/°C µV dB V mA A V mV Unit Load Regulation Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current ∆VO IQ ∆IQ ∆VO/∆T VN RR VD ISC IPK * 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. LM79XX/A (KA79XX, MC79XX) FIXED VOLTAGE REGULATOR (NEGATIVE) LM7915 ELECTRICAL CHARACTERISTICS Characteristic Output Voltage Line Regulation Symbol VO ∆VO (VI = 23V, IO = 500mA, 0°C ≤T J +125°C, CI =2.2µF, CO = 1µF, unless otherwise specified.) 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 -14.4 -14.25 Typ -15 -15 12 6 12 4 3 0.05 0.1 -0.9 250 54 60 2 300 2.2 Max -15.6 -15.75 300 150 300 mV 150 6 0.5 1 mA mA mV/°C µV dB V mA A V mV Unit Load Regulation ∆VO IQ ∆IQ ∆VO/∆T VN RR VD ISC IPK Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current * 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. LM79XX/A (KA79XX, MC79XX) FIXED VOLTAGE REGULATOR (NEGATIVE) LM7918 ELECTRICAL CHARACTERISTICS Characteristic Output Voltage Line Regulation Symbol VO ∆VO (VI = 27V, lO = 500mA, 0°C ≤T J ≤+125°C, CI =2.2µF, CO = 1µF, unless otherwise specified.) 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 -17.3 -17.1 Typ -18 -18 15 8 15 5 3 Max -18.7 -18.9 360 180 360 mV 180 6 0.5 1 mA mA mV/°C µV dB V mA A V mV Unit Load Regulation Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current ∆VO IQ ∆IQ ∆VO/∆T VN RR VD ISC IPK -1 300 54 60 2 300 2.2 * 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. LM79XX/A (KA79XX, MC79XX) FIXED VOLTAGE REGULATOR (NEGATIVE) LM7924 ELECTRICAL CHARACTERISTICS Characteristic Output Voltage Line Regulation Symbol VO ∆VO (VI = 33V, lO = 500mA, 0°C ≤T J ≤+125°C, CI =2.2µF, CO = 1µF, unless otherwise specified.) 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 - 23 - 22.8 Typ - 24 - 24 15 8 15 5 3 Max - 25 - 25.2 480 180 480 mV 240 6 0.5 1 mA mA mV/°C µV dB V mA A V mV Unit Load Regulation ∆VO IQ ∆IQ ∆VO/∆T VN RR VD ISC IPK Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current -1 400 54 60 2 300 2.2 * 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. LM79XX/A (KA79XX, MC79XX) 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 Symbol 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 VI= -8 to -12V IO=1A IO = 5mA to 1.5A Load Regulation Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current ∆VO IQ ∆IQ ∆VO/∆T VN RR VD ISC IPK TJ =+ 25°C IO = 250 to 750mA TJ = +25°C IO = 5mA to 1A VI = -8 to -25V IO = 5mA f = 10Hz to 100KHz TA =+ 25°C f = 120Hz, IO = -35V ∆VI = 10V TJ=+ 25°C IO = 1A TJ =+ 25°C, VI = -35V TJ =+ 25°C Min - 4.9 - 4.8 Typ - 5.0 -5.0 5 2 7 7 10 3 3 0.05 0.1 - 0.4 40 54 60 2 300 2.2 Max - 5.1 - 5.2 50 25 50 50 100 50 6 0.5 0.8 mV mA mA mV/°C µV dB V mA A V Unit mV Line Regulation ∆VO * 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. LM7912A ELECTRICAL CHARACTERISTICS LM79XX/A (KA79XX, MC79XX) FIXED VOLTAGE REGULATOR (NEGATIVE) (VI= 18V, 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 = -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 -11.75 -11.5 Typ -12 -12 12 6 12 4 3 0.05 0.1 -0.8 200 54 60 2 300 2.2 Max -12.25 -12.5 240 120 240 mV 120 6 0.5 1 mA mA mV/°C µV dB V mA A V mV Unit Load Regulation Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current ∆VO IQ ∆IQ ∆VO/∆T VN RR VD ISC IPK * 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. LM7915A ELECTRICAL CHARACTERISTICS LM79XX/A (KA79XX, MC79XX) FIXED VOLTAGE REGULATOR (NEGATIVE) (VI = 23V, 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 = -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 -14.7 -14.4 Typ -15 -15 12 6 12 4 3 0.05 0.1 -0.9 250 54 60 2 300 2.2 Max -15.3 -15.6 300 150 300 mV 150 6 0.5 1 mA mA mV/°C µV dB V mA A V mV Unit Load Regulation ∆VO IQ ∆IQ ∆VO/∆T VN RR VD ISC IPK Quiescent Current Quiescent Current Change Temperature Coefficient of VD Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Current * 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. TYPICAL PERFORMANCE CHARACTERISTICS LM79XX/A (KA79XX, MC79XX) FIXED VOLTAGE REGULATOR (NEGATIVE) Fig.1 Output Voltage 5.1 Fig. 2 Load Regulation 15 Load Regulation [mV] Output Voltage [-V] 5.05 5 4.95 4.9 4.85 4.8 -40 -25 0 25 50 Vin=10V Io=40mA 13 11 9 7 5 3 1 -1 -3 -5 Io=1.5A Vin=25V Io=100mA Io=0.75A 75 100 125 -40 -25 0 25 50 75 100 125 TA, Ambient Temperature [ oC] Fig.3 Quiescent Current 5 TA, Ambient Temperature [ oC] Fig. 4 Dropout Voltage 4 3.5 Quiescent Current [mA] Dropout Voltage [V] 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 -40 -25 0 25 50 75 100 125 3 2.5 2 1.5 1 0.5 0 -40 -25 0 25 50 75 100 125 Io=1A TA, Ambient Temperature [oC] Fig.5 Short Circuit Current TA, Ambient Temperature [oC] 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 -40 -25 0 25 50 75 100 125 Short Circuit Current [A] TA, Ambient Temperature [oC] TYPICAL APPLICATIONS LM79XX/A (KA79XX, MC79XX) FIXED VOLTAGE REGULATOR (NEGATIVE) Fig. 6 Negative Fixed output regulator + 2.2µF CI - VI 2 1 KA79XX 3 + 1µF CO - VO 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. Fig. 7 Split power supply (± 12V/1A) + 15V + 1 KA7812 2 3 + +12V 1N4001 0.33 µF + 2.2 µF 1 µF 1 µF + * GND 1N4001 1 - 15V 2 KA7912 3 * -12V *: Against potential latch-up problems. 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™ E2CMOSTM FACT™ FACT Quiet Series™ FAST® FASTr™ GTO™ HiSeC™ DISCLAIMER ISOPLANAR™ MICROWIRE™ POP™ PowerTrench™ QS™ Quiet Series™ SuperSOT™-3 SuperSOT™-6 SuperSOT™-8 TinyLogic™ 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 2. A critical component is any component of a life support device or system whose failure to perform can systems which, (a) are intended for surgical implant into be reasonably expected to cause the failure of the life the body, or (b) support or sustain life, or (c) whose support device or system, or to affect its safety or failure to perform when properly used in accordance with instructions for use provided in the labeling, can be effectiveness. reasonably expected to result in significant injury to the user. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Product Status Formative or In Design Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. 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. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. Preliminary First Production No Identification Needed Full Production 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.