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?2012 fairchild semiconductor corporation www.fairchildsemi.com rev. 1.0.3 features ? output current in excess of 1a ? output voltages of -5, -6, -8, -9, -12, -15, -18 , -24v ? internal thermal overload protection ? short circuit protection ? output transistor safe operating area compensation description the ka79xx/ka79xxa 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 ty pe employs internal current limiting, thermal shutdown and safe operating area protection, making it essentially indestructible. to-220 (dual gauge) 1. gnd 2. input 3. output 1 vin internal block digram voltage reference + - protection circuitry r1 r2 rsc gnd i1 i2 out in q1 q2 output input ka79xx/ka79xxa 3-terminal 1a negative voltage regulator
ka79xx/ka79xxa 2 absolute maximum ratings note: 1. thermal resistance test board size: 76.2mm * 114.3mm * 1.6mm(1s0p) jedec standard: jesd51-3, jesd51-7 2. assume no ambient airflow electrical characteristics (ka7905) (v i = -10v, i o = 500ma, 0 c t j +125 c, c i =2.2 f, c o =1 f, unless otherwise specified.) note 3. load and line regulation are specified at co nstant junction temper ature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty is used. parameter symbol value unit input voltage v i -35 v thermal resistance junction-case (note1) r jc 5 c/w thermal resistance junction-air (note1, 2) r ja 65 c/w operating temperature range t opr 0 ~ +125 c storage temperature range t stg - 65 ~ +150 c parameter symbol conditions min. typ. max. unit output voltage v o t j = +25 c -4.8 -5.0 -5.2 v i o = 5ma to 1a, p o 15w v i = -7v to -20v -4.75 -5.0 -5.25 line regulation (note3) v o t j = +25 c v i = -7v to -25v - 35 100 mv v i = -8v to -12v - 8 50 load regulation (note3) v o t j = +25 c, i o = 5ma to 1.5a - 10 100 mv t j =+25 c, i o = 250ma to 750ma - 3 50 quiescent current i q t j =+25 c-36ma quiescent cu rrent change i q i o = 5ma to 1a - 0.05 0.5 ma v i = -8v to -25v - 0.1 0.8 temperature coefficient of v d vo/ ti o = 5ma - -0.4 - mv/ c output noise voltage v n f = 10hz to 100khz, t a = +25 c-40- v ripple rejection rr f = 120hz, v i = 10v 54 60 - db dropout voltage v d t j =+25 c, i o = 1a - 2 - v short circuit current i sc t j =+25 c, v i = -35v - 300 - ma peak current i pk t j =+25 c-2.2-a
ka79xx/ka79xxa 3 electrical characteristics (ka7906) (continued) (v i = -11v, i o = 500ma, 0 c t j +125 c, c i =2.2 f, c o = 1 f, unless otherwise specified.) note 1. load and line regulation are specified at co nstant junction temper ature. changes in v o due to heating effe cts must be taken into account separately. pulse testing with low duty is used. parameter symbol conditions min. typ. max. unit output voltage v o t j =+25 c -5.75 -6 -6.25 v i o = 5ma to 1a, p o 15w v i = -9v to -21v -5.7 -6 -6.3 line regulation (note1) v o t j = +25 c v i = -8v to -25v - 10 120 mv v i = -9v to -13v - 5 60 load regulation (note1) v o t j = +25 c, i o = 5ma to 1.5a - 10 120 mv t j = +25 c, i o = 250ma to 750ma - 3 60 quiescent current i q t j = +25 c-36ma quiescent cu rrent change i q i o = 5ma to 1a - 0.05 0.5 ma v i = -8v to -25v - 0.1 1.3 temperature coefficient of v d vo/ ti o = 5ma - -0.5 - mv/ c output noise voltage v n f = 10hz to 100khz, t a =+25 c-130- v ripple rejection rr f = 120hz, v i = 10v 54 60 - db dropout voltage v d t j = +25 c, i o = 1a - 2 - v short circuit current i sc t j = +25 c, v i = -35v - 300 - ma peak current i pk t j = +25 c-2.2-a
ka79xx/ka79xxa 4 electrical characteristics (ka7908) (continued) (v i = -14v, i o = 500ma, 0 c t j +125 c, c i =2.2 f, c o =1 f, unless otherwise specified.) note 1. load and line regulation are specified at co nstant junction temper ature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty is used. parameter symbol conditions min. typ. max. unit output voltage v o t j =+25 c-7.7-8-8.3 v i o = 5ma to 1a, p o 15w v i = -10v to -23v -7.6 -8 -8.4 line regulation (note1) v o t j = +25 c v i = -10.5v to -25v - 10 160 mv v i = -11v to -17v - 5 80 load regulation (note1) v o t j = +25 c, i o = 5ma to 1.5a - 12 160 mv t j = +25 c, i o = 250ma to 750ma - 4 80 quiescent current i q t j = +25 c-36ma quiescent cu rrent change i q i o = 5ma to 1a - 0.05 0.5 ma v i = -10.5v to -25v - 0.1 1 temperature coefficient of v d vo/ ti o = 5ma - -0.6 - mv/ c output noise voltage v n f = 10hz to 100khz, t a = +25 c-175- v ripple rejection rr f = 120hz, v i = 10v 54 60 - db dropout voltage v d t j =+25 c, i o = 1a - 2 - v short circuit current i sc t j =+25 c, v i = -35v - 300 - ma peak current i pk t j = +25 c-2.2-a
ka79xx/ka79xxa 5 electrical characteristics (ka7909) (continued) (v i = -15v, i o = 500ma, 0 c t j +125 c, c i =2.2 f, c o =1 f, unless otherwise specified.) note 1. load and line regulation are specified at co nstant junction temper ature. changes in v o due to heating effe cts must be taken into account separately. pulse testing with low duty is used. parameter symbol conditions min. typ. max. unit output voltage v o t j = +25 c -8.7 -9.0 -9.3 v i o = 5ma to 1a, p o 15w v i = -1.5v to -23v -8.6 -9.0 -9.4 line regulation (note1) v o t j =+25 c v i = -11.5v to -26v - 10 180 mv v i = -12v to -18v - 5 90 load regulation (note1) v o t j =+25 c, i o = 5ma to 1.5a - 12 180 mv t j =+25 c, i o = 250ma to 750ma - 4 90 quiescent current i q t j = +25 c-36ma quiescent cu rrent change i q i o = 5ma to 1a - 0.05 0.5 ma v i = -11.5v to -26v - 0.1 1 temperature coefficient of v d vo/ ti o = 5ma - -0.6 - mv/ c output noise voltage v n f = 10hz to 100khz, t a = +25 c-175- v ripple rejection rr f = 120hz, v i = 10v 54 60 - db dropout voltage v d t j = +25 c, i o = 1a - 2 - v short circuit current i sc t j = +25 c, v i = -35v - 300 - ma peak current i pk t j = +25 c-2.2-a
ka79xx/ka79xxa 6 electrical characteristics (ka7912) (continued) (v i = -19v, i o = 500ma, 0 c t j +125 c, c i =2.2 f, c o =1 f, unless otherw ise specified.) note 1. load and line regulation are specified at co nstant junction temper ature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty is used. parameter symbol conditions min. typ. max. unit output voltage v o t j = +25 c -11.5 -12 -12.5 v i o = 5ma to 1a, p o 15w v i = -15.5v to -27v -11.4 -12 -12.6 line regulation (note1) v o t j = +25 c v i = -14.5v to -30v - 12 240 mv v i = -16v to -22v - 6 120 load regulation (note1) v o t j = +25 c, i o = 5ma to 1.5a - 12 240 mv t j =+25 c, i o = 250ma to 750ma - 4 120 quiescent current i q t j =+25 c-36ma quiescent cu rrent change i q i o = 5ma to 1a - 0.05 0.5 ma v i = -14.5v to -30v - 0.1 1 temperature coefficient of v d vo/ ti o = 5ma - -0.8 - mv/ c output noise voltage v n f = 10hz to 100khz, t a =+25 c - 200 - v ripple rejection rr f = 120hz, v i = 10v 54 60 - db dropout voltage v d t j = +25 c, i o = 1a - 2 - v short circuit current i sc t j = +25 c, v i = -35v - 300 - ma peak current i pk t j = +25 c-2.2-a
ka79xx/ka79xxa 7 electrical characteristics (ka7915) (continued) (v i = -23v, i o = 500ma, 0 c t j +125 c, c i =2.2 f, c o =1 f, unless otherw ise specified.) note 1. load and line regulation are specified at co nstant junction temper ature. changes in v o due to heating effe cts must be taken into account separately. pulse testing with low duty is used. parameter symbol conditions min. typ. max. unit output voltage v o t j = +25 c -14.4 -15 -15.6 v i o = 5ma to 1a, p o 15w v i = -18v to -30v -14.25 -15 -15.75 line regulation (note1) v o t j = +25 c v i = -17.5v to -30v - 12 300 mv v i = -20v to -26v - 6 150 load regulation (note1) v o t j = +25 c, i o = 5ma to 1.5a - 12 300 mv t j =+25 c, i o = 250ma to 750ma - 4 150 quiescent current i q t j =+25 c-36ma quiescent cu rrent change i q i o = 5ma to 1a - 0.05 0.5 ma v i = -17.5v to -30v - 0.1 1 temperature coefficient of v d vo/ ti o = 5ma - -0.9 - mv/ c output noise voltage v n f = 10hz to 100khz, t a = +25 c - 250 - v ripple rejection rr f = 120hz, v i = 10v 54 60 - db dropout voltage v d t j = +25 c, i o = 1a - 2 - v short circuit current i sc t j = +25 c, v i = -35v - 300 - ma peak current i pk t j = +25 c-2.2-a
ka79xx/ka79xxa 8 electrical characteristics (ka7918) (continued) (v i = -27v, i o = 500ma, 0 c t j +125 c, c i =2.2 f, c o =1 f, unless otherwise specified.) note 1. load and line regulation are specified at co nstant junction temper ature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty is used. parameter symbol conditions min. typ. max. unit output voltage v o t j = +25 c -17.3 -18 -18.7 v i o = 5ma to 1a, p o 15w v i = -22.5v to -33v -17.1 -18 -18.9 line regulation (note1) v o t j = +25 c v i = -21v to -33v - 15 360 mv v i = -24v to -30v - 8 180 load regulation (note1) v o t j = +25 c, i o = 5ma to 1.5a - 15 360 mv t j = +25 c, i o = 250ma to 750ma - 5 180 quiescent current i q t j = +25 c-36ma quiescent cu rrent change i q i o = 5ma to 1a - 0.05 0.5 ma v i = -21v to -33v - 0.1 1 temperature coefficient of v d vo/ ti o = 5ma - -1 - mv/ c output noise voltage v n f = 10hz to 100khz, t a = +25 c-300- v ripple rejection rr f = 120hz, v i = 10v 54 60 - db dropout voltage v d t j = +25 c, i o = 1a - 2 - v short circuit current i sc t j = +25 c, v i = -35v - 300 - ma peak current i pk t j =+25 c-2.2-a
ka79xx/ka79xxa 9 electrical characteristics (ka7924) (continued) (v i = -33v, i o = 500ma, 0 c t j +125 c, c i =2.2 f, c o =1 f, unless otherw ise specified.) note 1. load and line regulation are specified at co nstant junction temper ature. changes in v o due to heating effe cts must be taken into account separately. pulse testing with low duty is used. parameter symbol conditions min. typ. max. unit output voltage v o t j = +25 c-23-24-25 v i o = 5ma to 1a, p o 15w v i = -27v to -38v -22.8 -24 -25.2 line regulation (note1) v o t j =+25 c v i = -27v to -38v - 15 480 mv v i = -30v to -36v - 8 180 load regulation (note1) v o t j = +25 c, i o = 5ma to 1.5a - 15 480 mv t j = +25 c, i o = 250ma to 750ma - 5 240 quiescent current i q t j = +25 c-36ma quiescent cu rrent change i q i o = 5ma to 1a - 0.05 0.5 ma v i = -27v to -38v - 0.1 1 temperature coefficient of v d vo/ ti o = 5ma - -1 - mv/ c output noise voltage v n f = 10hz to 100khz, t a =+25 c-400- v ripple rejection rr f = 120hz, v i = 10v 54 60 - db dropout voltage v d t j =+25 c, i o = 1a - 2 - v short circuit current i sc t j =+25 c, v i = -35v - 300 - ma peak current i pk t j =+25 c-2.2-a
ka79xx/ka79xxa 10 electrical characteristics (ka7912a) (continued) (v i = -19v, i o = 500ma, 0 c t j +125 c, c i =2.2 f, c o =1 f, unless otherw ise specified.) note 1. load and line regulation are specified at co nstant junction temper ature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty is used. parameter symbol conditions min. typ. max. unit output voltage v o t j =+25 c -11.75 -12 -12.25 v i o = 5ma to 1a, p o 15w v i = -15.5v to -27v -11.5 -12 -12.5 line regulation (note1) v o t j = +25 c v i = -14.5v to -27v io = 1a -12120 mv v i = -16v to -22v io = 1a -660 v i = -14.8v to -30v - 12 120 v i = -16v to -22v, io = 1a - 12 120 load regulation (note1) v o t j =+25 c, i o = 5ma to 1.5a - 12 150 mv t j =+25 c, i o = 250ma to 750ma - 4 75 quiescent current i q t j =+25 c-36ma quiescent cu rrent change i q i o = 5ma to 1a - 0.05 0.5 ma v i = -15v to -30v - 0.1 1 temperature coefficient of v d vo/ ti o = 5ma - -0.8 - mv/ c output noise voltage v n f = 10hz to 100khz, t a =+25 c - 200 - v ripple rejection rr f = 120hz, v i = 10v 54 60 - db dropout voltage v d t j =+25 c, i o = 1a - 2 - v short circuit current i sc t j =+25 c, v i = -35v - 300 - ma peak current i pk t j =+25 c-2.2-a
ka79xx/ka79xxa 11 electrical characteristics (ka7915a) (continued) (v i = -23v, i o = 500ma, 0 c t j +125 c, c i =2.2 f, c o =1 f, unless otherw ise specified.) note 1. load and line regulation are specified at co nstant junction temper ature. changes in v o due to heating effe cts must be taken into account separately. pulse testing with low duty is used. parameter symbol conditions min. typ. max. unit output voltage v o t j = +25 c -14.7 -15 -15.3 v i o = 5ma to 1a, p o 15w v i = -18v to -30v -14.4 -15 -15.6 line regulation (note1) v o t j =+25 c v i = -17.5v to -30v io = 1a -12150 mv v i = -20v to -26v io = 1a -675 v i = -17.9v to -30v - 12 150 v i = -20v to -26v, io = 1a - 6 150 load regulation (note1) v o t j = +25 c, i o = 5ma to 1.5a - 12 150 mv t j = +25 c, i o = 250ma to 750ma - 4 75 quiescent current i q t j =+25 c-36ma quiescent cu rrent change i q i o = 5ma to 1a - 0.05 0.5 ma v i = -18.5v to -30v - 0.1 1 temperature coefficient of v d vo/ ti o = 5ma - -0.9 - mv/ c output noise voltage v n f = 10hz to 100khz, t a =+25 c-250- v ripple rejection rr f = 120hz, v i = 10v 54 60 - db dropout voltage v d t j = +25 c, i o = 1a - 2 - v short circuit current i sc t j =+25 c, v i = -35v - 300 - ma peak current i pk t j =+25 c-2.2-a
ka79xx/ka79xxa 12 typical performan ce characteristics figure 1. output voltage figure 3. quiescent current figure 5. short circuit current figure 2. load regulation figure 4. dropout voltage 4.8 4.85 4.9 4.95 5 5.05 5.1 -40 -25 0 25 50 75 100 125 vin=10v io=40ma vin=25v io=100ma ou tp ut vo lta ge [- v ] t a , ambient temperature [ o c] output voltage[-v] 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 -40 -25 0 25 50 75 100 125 quiescent current [ma] dvl[v] t a , ambient temperature [ o c] -0.1 -0.05 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 -40 -25 0 25 50 75 100 125 sh ort cir cui t cu rre nt [a] t a , ambient temperature [ o c] short circuit current[a] -5 -3 -1 1 3 5 7 9 11 13 15 -40 -25 0 25 50 75 100 125 5 io=0.75 a io=1.5a lo ad re gul ati on [m v] t a , ambient temperature [ o c] load regulation[mv] 0 0.5 1 1.5 2 2.5 3 3.5 4 -40 -25 0 25 50 75 100 125 io=1a dropout voltage [v] t a , ambient temperature [ o c]
ka79xx/ka79xxa 13 typical applications figure 6. negative fixed output regulator figure 7. split power supply ( 12v/1a) note: (1) to specify an output voltage, substitute voltage value for "xx " (2) required for stability. for value given, capacitor must be solid tant alum. if aluminium electronics are used, at least ten t imes value shown should be selected. c i is required if regulator is located an a ppreciable 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 devi ce from momentary input short circuit. ka79xx output input 1 3 2 2.2uf 1uf co c i + + +12v gnd -12v +15v -15v 1 3 2 1 2 3 1n4001 1n4001 0.33uf 2.2uf 1uf 1uf co c1 c1 co + + + + * * ka7812 ka7912
ka79xx/ka79xxa 14 mechanical dimensions package dimensions in millimeters 4.50 0.2 0 9.90 0.20 1.52 0.10 0.80 0.10 2.40 0.20 10.00 0.20 1.27 0.10 ?.60 0.10 (8.70) 2.80 0.10 15.90 0.20 10.08 0.30 18.95max. (1.70) (3.70) (3.00) (1.46) (1.00) (45 ) 9.20 0.20 13.08 0.20 1.30 0.10 1.30 +0.1 0 ?.0 5 0.50 +0.10 ?.05 2.54typ [2.54 0.20 ] 2.54typ [2.54 0.20 ] to-220 [dual gauge]
ka79xx/ka79xxa 15 ordering information product number output voltage tolerance package operating temperature ka7905tu 4% to-220 (dual gauge) 0 ~ +125 c ka7906tu ka7908tu ka7909tu ka7912tu ka7915tu ka7918tu ka7924tu ka7912atu 2% ka7915atu
ka79xx/ka79xxa 6/14/12 0.0m 001 stock#ds400172 ? 2012 fairchild semiconductor corporation 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 the president 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 lif e, and (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 a significant injury of the user. 2. a critical component in an y component of a life support device or system whose fa ilure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com disclaimer fairchild semiconductor reserves the right to make changes with out further notice to any products herein to improve re liability, function or design. fairchild does not assume any liability arising out of the applic ation or use of any product or circuit described herein; neither does it convey any license under its pat ent rights, nor the rights of others.

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