2008. 6. 24 1/5 semiconductor technical data kia278r00pi bipolar linear integrated circuit revision no : 2 2a adjustable low drop voltage regulator the kia278r00pi is a low drop voltage regulator suitable for various electronic equipments. it provides constant voltage power source with to-220-4 terminal lead full molded pkg. the regulator has multi function such as over current protection, overheat protection. features ? adjustable output voltage (range : 1.5~30v) ? 2.0a output low drop voltage regulator. ? built in over current protection, over heat protection function. a f j l d m 12 34 1 2 3 4 input (v ) output (v ) gnd adjustable (adj.) in o dim millimeters to-220is-4 10.00 0.20 15.00 0.20 2.70 0.20 0.60 0.10 3.20 0.20 3.50 0.10 a b c d e f g 15.70 0.20 0.40 0.10 h 14.3+0.2/-0.1 1.45 0.10 1.00 0.10 2.54 4.50 0.20 7.5 0.1 1.50 0.10 j k l m n o p s r 8 5 b c e g h l v v u t k n o r s p + _ + _ + _ 1.30 0.1 3-1.00 0.1 1.30 0.1 t u v + _ + _ + _ + _ + _ + _ + _ + _ + _ + _ + _ + _ + _ maximum ratings (ta=25 ? ) characteristic symbol rating unit remark input voltage v in 35 v - output current i out 2 a - power dissipation 1 p d1 1.5 w no heatsink power dissipation 2 p d2 15 w with heatsink operating junction temperature t j(opr) -40~150 ? - storage temperature t stg -45 ?- 150 ? - soldering temperature (10sec) t sol 260 ? -
2008. 6. 24 2/5 kia278r00pi revision no : 2 block diagram 2 3 v out 4 adj. gnd over heat protection aso protection bandgap reference - + v in 1 electrical characteristics (unless otherwise specified, v in =15v, v o =10v, i o =1a, r 1 =470 ? (note1 : v in =0.95v out )) characteristic symbol conditions min. typ. max. unit input voltage v in - 4.5 - 35 v output voltage v o r 2 =76 ? to 10.5k ? 1.5 - 30 v load regulation reg load i o =5ma ?- 2a - - 2.0 % line regulation reg line v in =11v~28v - - 2.5 % ripple rejection r ? r c ref =0 refer to fig.2 45 55 - db c ref =3.3 f 55 65 - reference voltage v ref - 1.26 1.29 1.32 v temperature cofficient of reference voltage t c v ref t j =0~125 ? - ?? 1.0 - % dropout voltage v d i o =2a (note1) - - 0.5 v quiescent current i q i o =0a - - 10 ma
2008. 6. 24 3/5 kia278r00pi revision no : 2 v 0.33 f i q r i l r1 470 ? r1 r2 r2 o v out = v ref x ( 1 + ) = 1.29 x ( 1 + ) v in 47 f v 0.33 f i r i q l r1 470 ? r2 o 47 f 3.3 f cref fig. 1 standard test circuit r1 r2 v in fig. 2 ripple rejection circuit ein + + _ _ f=120hz(sine wave) ei=0.5vrms rr=20log(ei/eo) 1 2 3 4 1 2 3 4 a a a a
2008. 6. 24 4/5 kia278r00pi revision no : 2 reference voltage deviation v ref (mv) -10 -25 025507 5 100 125 -5 0 5 10 r1=470 ? , r2=3.2k ? v in =15v i o =1.0a relative output voltage (%) 0 0 output current i o (a) fig. 4 i o - v o 1.0 2.0 3.0 4.0 20 40 60 80 100 power dissipation (w) fig. 3 ta - p d ambient temperature ta ( c) junction temperature t j ( c) 0 -25 050 100 150 5 10 15 20 p d 1 : no heat sink p d 2 : with infinite heat sink p 1 p 2 d d output voltage v o (v) input voltage v in (v) r l = 5 ? 5 0 0 5 r l = 10 10 15 15 0 -25 dropout voltage v d (v) i o =2a 0255 075 100 125 0.1 0.2 0.3 0.4 0.5 i o =1.5a i o =1a i o =0.5a junction temperature t j ( c) junction temperature t j ( c) 0 -25 quiescent current i q (ma) 0255075 100 125 2 4 6 8 10 v in = 35v i o = 0 r1=470 ? , r2=3.2k ? t j = 25 c fig. 5 t j - v o fig. 7 t j - v d fig. 8 t - i j q fig. 6 v in - v out oblique line portion : overheat protection may operate in this area. note)
2008. 6. 24 5/5 kia278r00pi revision no : 2 fig. 9 f - rr fig. 10 i o - rr input ripple frequency f (khz) 0.1 0 ripple rejection rr (db) 10 20 30 40 50 60 70 80 110 100 ripple rejection rr (db) output current i o (a) 0.1 0.5 1.0 30 40 50 60 70 80 cref=3.3 f cref=3.3 f cref=0 cref=0 r1=470 ? , r2=3.2k ? i o =1a t j =25 c ei=0.5vrms rr=20 log (ei/eo) r1=470 ? , r2=3.2k ? t j =25 c ei=0.5vrms f = 120hz (sine wave) rr=20 log (ei/eo)
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