bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940- 9556 www.baylinear.com 100ma negative voltage regulator lm79lxx packaging information ordering information device operating voltage temp. package lm79l05 7 to 20 0 to 125 c to-92 lm79l12 14.5 to 27 0 to 125 c to-92 lm79l15 17.5 to 30 0 to 125 c to-92 lm79l18 20.5 to 33 0 to 125 c to-92 lm79l24 27 to 38 0 to 125 c to-92 description the bay linear lm79lxx is integrated linear negative regulator with three terminals. the lm79lxx offer several fixed output voltages making them useful in wide range of applications. these applications include on-card regulation for elimination of noise and distribution problems associated with single-point regulation. in addition they can be used with power pass elements to make high-current voltage regulators. each of these regulators can deliver up to 100ma of output current. when used in replacement for a zener diode-resistor combination, an effective improvement in output impedance can be obtained together with lower-bias current. the lm79lxx is available in the plastic to-92 (z) package. features ? output current of 100ma ? output voltage tolerance of 5% ? internal thermal overload protection ? internal short-circuit limited ? no external component ? output voltage- 5.0v, -12v, -15v, -18v, - 24v ? offer in plastic to-92 ? direct replacement for mc79l00 applications ? post regulator for switching dc/dc converter ? bias supply for analog circuits bay linear bay linear bay linear bay linear linear excellence bottom view to - 92 (n) 1 3 2 1. common 2. input 3. output bottom view to - 92 (n) 1 3 2 1. 2. input 3.
bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940- 9556 www.baylinear.com lm79lxx absolute maximum rating parameter lm79l05 lm78l12?lm78l18 lm78l24 unit input voltage -30 -35 -40 v operating free-air, case, virtual junction temp. 0 to 150 0 to 150 0 to 150 storage temperature range -65 to 150 -65 to 150 -65 to 150 lead temperature 1.6 mm from case for sec. 260 260 260 c electrical characteristics (lm79l05) (v i =10v, i o =40ma, 0 c t j 125 c, c i = 0.33 f, c o = 0.1 f, unless otherwise specified. (note 1) parameter symbol conditions min typ max unit output voltage v o t j = 25 c -4.8 -5.0 -5.2 v v i = -7v to -20v t j = 25 c 15 150 line regulation ? v o v i = -7v to -20v t j = 25 c 100 mv i o = 1ma to 100ma, 25 c 20 60 load regulation ? v o i o = 1ma to 40ma, 25 c 10 30 mv ripple rejection rr v i = -8v to -18v, f=120hz 41 49 db output noise voltage v n f= 10hz to 100hz t j = 25 c 46 v dropout voltage v d t j = 25 c 1.7 v quiescent current t j = 25 c 6ma ma v i = -8v to -20v, t j = 25 c 1.5 quiescent current change ? i q i o = 1ma to 40ma, t j = 25 c 0.1 ma electrical characteristics (lm79l12) (v i =10v, i o =40ma, 0 c t j 125 c, c i = 0.33 f, c o = 0.1 f, unless otherwise specified. (note 1) parameter symbol conditions min typ max unit output voltage v o t j = 25 c -11.50 -12 -12.5 v v i =-14.5v to -27v t j = 25 c 50 250 line regulation ? v o v i =- 14.5v to -27v t j = 25 c 40 200 mv i o = 1ma to 100ma, 25 c 24 100 load regulation ? v o i o = 1ma to 40ma, 25 c 15 50 mv ripple rejection rr v i = -16v to -27v, f=120hz 37 42 db output noise voltage v n f= 10hz to 100hz tj = 25 c 80 v dropout voltage v d t j = 25 c 1.7 v quiescent current t j = 25 c 6.5ma ma v i = -16v to -27v, t j = 25 c 1.5 quiescent current change ? i q i o = 1ma to 40ma, t j = 25 c 0.1 ma
bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940- 9556 www.baylinear.com lm79lxx electrical characteristics (lm79l15) (v i =10v, i o =40ma, 0 c t j 125 c, c i = 0.33 f, c o = 0.1 f, unless otherwise specified. (note 1) parameter symbol conditions min typ max unit output voltage v o t j = 25 c -14.40 -15 -15.60 v v i = -17.5v to -30v t j = 25 c 65 250 line regulation ? v o v i = -17.5v to -30v t j = 25 c 50 300 mv i o = 1ma to 100ma, 25 c 25 150 load regulation ? v o i o = 1ma to 40ma, 25 c 15 75 mv ripple rejection rr v i = -18.5v to -28.5v, f=120hz 34 39 db output noise voltage v n f= 10hz to 100hz tj = 25 c 90 v dropout voltage v d t j = 25 c 1.7 v quiescent current t j = 25 c 6.5 ma v i = -20v to -30v, t j = 25 c 1.5 quiescent current change ? i q i o = 1ma to 40ma, t j = 25 c 0.1 ma electrical characteristics (lm79l18) (v i =10v, i o =40ma, 0 c t j 125 c, c i = 0.33 f, c o = 0.1 f, unless otherwise specified. (note 1) parameter symbol conditions min typ max unit output voltage v o t j = 25 c -17.30 -18 -18.7 v v i = -20.5v to -33v t j = 25 c 70 325 line regulation ? v o v i = -20.5v to -33v t j = 25 c 60 375 mv i o = 1ma to 100ma, 25 c 27 170 load regulation ? v o i o = 1ma to 40ma, 25 c 19 85 mv ripple rejection rr v i = -23v to -33v, f=120hz 33 48 db output noise voltage v n f= 10hz to 100hz tj = 25 c 150 v dropout voltage v d t j = 25 c 1.7 v quiescent current t j = 25 c 4.7 6.5ma ma v i = -21v to -33v, t j = 25 c 1.5 quiescent current change ? i q i o = 1ma to 40ma, t j = 25 c 0.1 ma
bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940- 9556 www.baylinear.com lm79lxx electrical characteristics (lm79l24) (v i =10v, i o =40ma, 0 c t j 125 c, c i = 0.33 f, c o = 0.1 f, unless otherwise specified. (note 1) parameter symbol conditions min typ max unit output voltage v o t j = 25 c -23 -24 -25 v v i = -27v to -38v t j = 25 c 90 350 line regulation ? v o v i = -27v to -38v t j = 25 c 75 300 mv i o = 1ma to 100ma, 25 c 40 200 load regulation ? v o i o = 1ma to 40ma, 25 c 25 100 mv ripple rejection rr v i =- 29v to -35v, f=120hz 30 33 db output noise voltage v n f= 10hz to 100hz tj = 25 c 200 v dropout voltage v d t j = 25 c 1.7 v quiescent current t j = 25 c 4 6.5 ma v i = -28v to -38v, t j = 25 c 1.5 quiescent current change ? i q i o = 1ma to 40ma, t j = 25 c 0.1 ma advance information - these data sheets contain descriptions of products that are in development. the specifications are based on the engineering ca lculations, computer simulations and/ or initial prototype evaluation. preliminary information - these data sheets contain minimum and maximum specifications that are based on the initial device characterizations. these lim its are subject to change upon the completion of the full characterization over the specified temperature and supply voltage ranges. the application circuit examples are only to explain the representative applications of the devices and are not intended to gua rantee any circuit design or permit any industrial property right to other rights to execute. bay linear takes no responsibility for any problems related to any industrial property right resulting from the use of the contents shown in the data book. typical parameters can and do vary in different applications. customer?s technical experts must validate all operating parameters including ? typical? for each customer applic ation. life support and nuclear policy bay linear products are not authorized for and should not be used within life support systems which are intended for surgical implants into the body to support or sustain life, in aircraft, space equipment, submarine, or nuclear facility applications wi thout the specific written consent of bay linear president.
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