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lm78lxx series 3-terminal positive regulators general description the lm78lxx series of three terminal positive regulators is available with several fixed output voltages making them useful in a wide range of applications. when used as a zener diode/resistor combination replacement, the lm78lxx usu- ally results in an effective output impedance improvement of two orders of magnitude, and lower quiescent current. these regulators can provide local on card regulation, eliminating the distribution problems associated with single point regu- lation. the voltages available allow the lm78lxx to be used in logic systems, instrumentation, hifi, and other solid state electronic equipment. the lm78lxx is available in the plastic to-92 (z) package, the plastic so-8 (m) package and a chip sized package (8-bump micro smd) using national's micro smd package technology. with adequate heat sinking the regulator can deliver 100 ma output current. current limiting is included to limit the peak output current to a safe value. safe area protection for the output transistors is provided to limit inter- nal power dissipation. if internal power dissipation becomes too high for the heat sinking provided, the thermal shutdown circuit takes over preventing the ic from overheating. features n lm78l05 in micro smd package n output voltage tolerances of 5% over the temperature range n output current of 100 ma n internal thermal overload protection n output transistor safe area protection n internal short circuit current limit n available in plastic to-92 and plastic so-8 low profile packages n no external components n output voltages of 5.0v, 6.2v, 8.2v, 9.0v, 12v, 15v n see an-1112 for micro smd considerations connection diagrams so-8 plastic (m) (narrow body) ds007744-2 top view 8-bump micro smd ds007744-24 top view (bump side down) (to-92) plastic package (z) ds007744-3 bottom view micro smd marking orientation ds007744-33 top view november 2000 lm78lxx series 3-terminal positive regulators ? 2000 national semiconductor corporation ds007744 www.national.com
absolute maximum ratings (note 1) if military/aerospace specified devices are required, please contact the national semiconductor sales office/ distributors for availability and specifications. power dissipation (note 5) internally limited input voltage 35v storage temperature ?65c to +150c operating junction temperature so-8 0c to 125c micro smd ?40c to 85c soldering information infrared or convection (20 sec.) 235c wave soldering (10 sec.) 260c (lead time) esd susceptibility (note 2) 1kv lm78lxx electrical characteristics limits in standard typeface are for t j = 25c, bold typeface ap- plies over 0c to 125c for so-8 package and ?40c to 85c for micro smd package. limits are guaranteed by produc- tion testing or correlation techniques using standard statistical quality control (sqc) methods. unless otherwise specified: i o = 40 ma, c i = 0.33 f, c o = 0.1 f. lm78l05 unless otherwise specified, v in = 10v symbol parameter conditions min typ max units v o output voltage 4.8 5 5.2 v 7v v in 20v 1ma i o 40 ma (note 3) 4.75 5.25 1ma i o 70 ma (note 3) 4.75 5.25 d v o line regulation 7v v in 20v 18 75 mv 8v v in 20v 10 54 d v o load regulation 1 ma i o 100 ma 20 60 1ma i o 40 ma 5 30 i q quiescent current 3 5 ma d i q quiescent current change 8v v in 20v 1.0 1ma i o 40 ma 0.1 v n output noise voltage f = 10 hz to 100 khz (note 4) 40 v ripple rejection f = 120 hz 8v v in 16v 47 62 db i pk peak output current 140 ma average output voltage tempco i o =5ma ?0.65 mv/c v in (min) minimum value of input voltage required to maintain line regulation 6.7 7 v q ja thermal resistance (8-bump micro smd) 230.9 c/w lm78l62ac unless otherwise specified, v in = 12v symbol parameter conditions min typ max units v o output voltage 5.95 6.2 6.45 v 8.5v v in 20v 1ma i o 40 ma (note 3) 5.9 6.5 1ma i o 70 ma (note 3) 5.9 6.5 d v o line regulation 8.5v v in 20v 65 175 mv 9v v in 20v 55 125 d v o load regulation 1 ma i o 100 ma 13 80 1ma i o 40 ma 6 40 lm78lxx series www.national.com 2
lm78l62ac (continued) unless otherwise specified, v in = 12v symbol parameter conditions min typ max units i q quiescent current 2 5.5 ma d i q quiescent current change 8v v in 20v 1.5 1ma i o 40 ma 0.1 v n output noise voltage f = 10 hz to 100 khz (note 4) 50 v ripple rejection f = 120 hz 10v v in 20v 40 46 db i pk peak output current 140 ma average output voltage tempco i o =5ma ?0.75 mv/c v in (min) minimum value of input voltage required to maintain line regulation 7.9 v lm78l82ac unless otherwise specified, v in = 14v symbol parameter conditions min typ max units v o output voltage 7.87 8.2 8.53 v 11v v in 23v 1ma i o 40 ma (note 3) 7.8 8.6 1ma i o 70 ma (note 3) 7.8 8.6 d v o line regulation 11v v in 23v 80 175 mv 12v v in 23v 70 125 d v o load regulation 1 ma i o 100 ma 15 80 1ma i o 40 ma 8 40 i q quiescent current 2 5.5 ma d i q quiescent current change 12v v in 23v 1.5 1ma i o 40 ma 0.1 v n output noise voltage f = 10 hz to 100 khz (note 4) 60 v ripple rejection f = 120 hz 12v v in 22v 39 45 db i pk peak output current 140 ma average output voltage tempco i o =5ma ?0.8 mv/c v in (min) minimum value of input voltage required to maintain line regulation 9.9 v lm78l09ac unless otherwise specified, v in = 15v symbol parameter conditions min typ max units v o output voltage 8.64 9.0 9.36 v 11.5v v in 24v 1ma i o 40 ma (note 3) 8.55 9.45 1ma i o 70 ma (note 3) 8.55 9.45 lm78lxx series www.national.com 3
lm78l09ac (continued) unless otherwise specified, v in = 15v symbol parameter conditions min typ max units d v o line regulation 11.5v v in 24v 100 200 mv 13v v in 24v 90 150 d v o load regulation 1 ma i o 100 ma 20 90 1ma i o 40 ma 10 45 i q quiescent current 2 5.5 ma d i q quiescent current change 11.5v v in 24v 1.5 1ma i o 40 ma 0.1 v n output noise voltage 70 v ripple rejection f = 120 hz 15v v in 25v 38 44 db i pk peak output current 140 ma average output voltage tempco i o =5ma ?0.9 mv/c v in (min) minimum value of input voltage required to maintain line regulation 10.7 v lm78l12ac unless otherwise specified, v in = 19v symbol parameter conditions min typ max units v o output voltage 11.5 12 12.5 v 14.5v v in 27v 1ma i o 40 ma (note 3) 11.4 12.6 1ma i o 70 ma (note 3) 11.4 12.6 d v o line regulation 14.5v v in 27v 30 180 mv 16v v in 27v 20 110 d v o load regulation 1 ma i o 100 ma 30 100 1ma i o 40 ma 10 50 i q quiescent current 3 5 ma d i q quiescent current change 16v v in 27v 1 1ma i o 40 ma 0.1 v n output noise voltage 80 v ripple rejection f = 120 hz 15v v in 25 40 54 db i pk peak output current 140 ma average output voltage tempco i o =5ma ?1.0 mv/c v in (min) minimum value of input voltage required to maintain line regulation 13.7 14.5 v lm78lxx series www.national.com 4
lm78l15ac unless otherwise specified, v in = 23v symbol parameter conditions min typ max units v o output voltage 14.4 15.0 15.6 v 17.5v v in 30v 1ma i o 40 ma (note 3) 14.25 15.75 1ma i o 70 ma (note 3) 14.25 15.75 d v o line regulation 17.5v v in 30v 37 250 mv 20v v in 30v 25 140 d v o load regulation 1 ma i o 100 ma 35 150 1ma i o 40 ma 12 75 i q quiescent current 3 5 ma d i q quiescent current change 20v v in 30v 1 1ma i o 40 ma 0.1 v n output noise voltage 90 v ripple rejection f = 120 hz 18.5v v in 28.5v 37 51 db i pk peak output current 140 ma average output voltage tempco i o =5ma ?1.3 mv/c v in (min) minimum value of input voltage required to maintain line regulation 16.7 17.5 v note 1: absolute maximum ratings indicate limits beyond which damage to the device may occur. electrical specifications do not apply when operating the devi ce outside of its stated operating conditions. note 2: human body model, 1.5 k w in series with 100 pf. note 3: power dissipation 0.75w. note 4: recommended minimum load capacitance of 0.01 f to limit high frequency noise. note 5: typical thermal resistance values for the packages are: z package: q jc = 60 c/w, = q ja = 230 c/w m package: q ja = 180 c/w micro smd package: q ja = 230.9c/w lm78lxx series www.national.com 5
typical performance characteristics maximum average power dissipation (z package) ds007744-14 peak output current ds007744-16 dropout voltage ds007744-17 ripple rejection ds007744-18 output impedance ds007744-19 quiescent current ds007744-20 quiescent current ds007744-21 lm78lxx series www.national.com 6
equivalent circuit typical applications lm78lxx ds007744-7 fixed output regulator ds007744-8 * required if the regulator is located more than 3" from the power supply filter. * *see (note 4) in the electrical characteristics table. lm78lxx series www.national.com 7
typical applications (continued) adjustable output regulator ds007744-9 v out = 5v + (5v/r1 + i q )r2 5v/r1 > 3i q , load regulation (l r ) ? [(r1 + r2)/r1] (l r of lm78l05) current regulator ds007744-10 i out =(v out /r1) + i q > i q = 1.5 ma over line and load changes 5v, 500 ma regulator with short circuit protection ds007744-11 *solid tantalum. * * heat sink q1. * ** optional: improves ripple rejection and transient response. load regulation: 0.6% 0 i l 250 ma pulsed with t on = 50 ms. 15v, 100 ma dual power supply ds007744-12 *solid tantalum. lm78lxx series www.national.com 8
typical applications (continued) variable output regulator 0.5v-18v ds007744-13 *solid tantalum. v out =v g + 5v, r1 = (?v in /i q lm78l05 ) v out = 5v (r2/r4) for (r2 + r3) = (r4 + r5) a 0.5v output will correspond to (r2/r4) = 0.1 (r3/r4) = 0.9 lm78lxx series www.national.com 9
physical dimensions inches (millimeters) unless otherwise noted notes: unless otherwise specified 1. epoxy coating 2. 63sn/37pb eutectic bump 3. recommend non-solder mask defined landing pad. 4. pin 1 is established by lower left corner with respect to text orientation. remaining pins are numbered counterclockwise. 5. xxx in drawing number represents package size variation where x 1 is package width, x 2 is package length and x 3 is package height. 6. reference jedec registration mo-211, variation bc. 8-bump micro smd order number lm78l05ibp or lm78l05ibpx ns package number bpa08aab x 1 = 1.285 x 2 = 1.285 x 3 = 0.850 lm78lxx series www.national.com 10
physical dimensions inches (millimeters) unless otherwise noted (continued) s.o. package (m) order number lm78l05acm, lm78l12acm or lm78l15acm ns package number m08a molded offset to-92 (z) order number lm78l05acz, lm78l09acz, lm78l12acz, lm78l15acz, lm78l62acz or lm78l82acz ns package number z03a lm78lxx series www.national.com 11
notes life support policy national's products are not authorized for use as critical components in life support devices or systems without the express written approval of the president and general counsel of national 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, and 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 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. national semiconductor corporation americas tel: 1-800-272-9959 fax: 1-800-737-7018 email: support@nsc.com national semiconductor europe fax: +49 (0) 180-530 85 86 email: europe.support@nsc.com deutsch tel: +49 (0) 69 9508 6208 english tel: +44 (0) 870 24 0 2171 fran?ais tel: +33 (0) 1 41 91 8790 national semiconductor asia pacific customer response group tel: 65-2544466 fax: 65-2504466 email: ap.support@nsc.com national semiconductor japan ltd. tel: 81-3-5639-7560 fax: 81-3-5639-7507 www.national.com lm78lxx series 3-terminal positive regulators national does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and national reserves the righ t at any time without notice to change said circuitry and specifications.

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