2007. 9. 18 1/4 revision no : 1 electrical characteristics (unless otherwise specified, v in =5v, v o =3.3v, r 1 =1 , tj=25 ) semiconductor technical data KIA278R000P5 bipolar linear integrated circuit 2.0a adjustable output low drop voltage regulator with output on/off control function. features 2.0a output low dropout voltage regulator. very low dropout voltage : 0.5v/max (i out =2.0a) built-in on/off control terminal. : active high built-in over current, over heat protection function, aso protection functions. low quiescent current (output off mode) : 0.5 a(typ.) adjustable output voltage type : v out =vref~7v low voltage operation : vopr(min.)=2.35v. to-220is-5 f 14 25 3 g b d h e i k m j o p l n a c dim millimeters a b c d e f g h i 1.5 1.7 5.0 2.0 j k l m n o p 0.5 3.5 0.1 + _ 3.2 0.2 + _ 4.5 0.2 + _ 2.8 0.2 + _ 3.2 0.5 + _ 0.8 0.1 + _ 8.2 0.7 + _ 24.6 0.2 + _ 10 0.2 + _ 5.0 0.5 + _ 16.5 0.5 + _ 1 dc input (v in ) 3 dc output 5 gnd 2 on/off control (v c ) 4 adjustable terminal(v adj ) maximum ratings (ta=25 ) characteristic symbol rating unit input voltage v in 10 v on/off control voltage v c 10 v adjustable terminal voltage v adj 7 v output current i out 2.0 a power dissipation 1 (no heatsink) p d1 1.5 w power dissipation 2 (infinite heatsink) p d2 15 w junction temperature t j 150 operating temperature t opr -40 85 storage temperature t stg -40 150 characteristic symbol conditions min. typ. max. unit input voltage v in - 2.35 - 10 v output voltage v out - vref - 7 v reference voltage vref - 1.22 1.25 1.28 v load regulation reg load i o =5ma~2a - 0.2 2 % line regulation reg line v in =4v~10v, i o =5ma - 0.2 1 % temperature coefficient of output votage t c v o tj=0 125 , i o =5ma - 1.0 - % ripple rejection r r i out =0.3a, f=120hz, v ripple =0.5vrms, v in =5v, v out =3v 45 60 - db dropout voltage v d - - - 0.5 output on state for control voltage v c(on) - 2.0 - - v output on state for control current i c(on) v c =2.7v - - 200 a output off state for control voltage v c(off) - - - 0.8 v output off state for control current i c(off) v c =0.4v - - -0.4 a quiescent current i q i o =0 - 1 2 ma quiescent current (off mode) i q(off) v c =0.4v - 0.5 5 a
2007. 9. 18 2/4 KIA278R000P5 revision no : 1 a r l i o fig. 1 test circuit 0.33 f i q i q r1 r2 v in v in c in c in v in c in c out v c v o r l i o v o v o eo ei fig. 2 ripple rejection circuit 0.33 f a a a v v 47 f c out c out 47 f 1 k ? r1 r2 1 k ? v 2.7v fig. 3 typical application circuit 1 5 2 4 3 r1 r2 1 k ? v o =v refx 1 r1 r2 () f=120hz(sine wave) ei(rms)=0.5v i o =0.3a rr=20log(ei(rms) / eo(rms)) v in =5v v o =3.0v(r1=1k ?) loa d 1 5 2 3 4 1 5 2 3 4 on/off signal high : output on low or open : output off () [r1=1k ?, vref nearly = 1.25v]
2007. 9. 18 3/4 KIA278R000P5 revision no : 1 fig. 4 i o - v o output voltage v o (v) output current i o (a) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 v c =2.7v, ta=25 c r 1 =1k ? , r 2 =1.4k ? c in =0.33 f, c o =47 f fig. 6 v in - v o output voltage v o (v) input voltage v in (v) 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 v c =2.7v, ta=25 c r 1 =1k ? , r 2 =1.4k ? c in =0.33 f, c o =47 f 1234 5 10 9 8 7 6 -50 -40 -30 -20 -10 0 10 20 30 40 50 v in =5v, v c =2.7v, i o =1a r 1 =1k ? , r 2 =1.4k ? c in =100 f, c o =100 f -50 -25 0 25 50 75 125 100 fig. 7 v in - i bias circuit operating current i bias (ma) input voltage v in (v) 0 0 50 10 40 20 60 30 v c =2.7v ta=25 c c in =0.33 f, c o =47 f 1234 5 10 9 8 7 6 fig. 8 t j - v d dropout voltage v d (v) 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 v in =2.85v, v c =2.7v r 1 =1k ? , r 2 =1.4k ? c in =100 f, c o =100 f -50 -25 0 25 50 75 125 100 fig. 9 t j - i q quiescent current i q (ma) 0 0.5 1 1.5 2 v in =5v, r 1 =1k ?, r 2 =1.4k ?, v c =2.7v, i o =0a, c in =100 f c o =100 f -50 -25 0 25 50 75 125 100 5.5v r l =3 ? (io=1a) r l = ? (io=0a) r l =1.5 ? (io=2a) io=2a io = 1 a r l =1.5 ? (io=2a) r l =3 ? (io=1a) r l = ? (io=0a) junction temperature t j ( ) c fig. 5 ta - v ref reference voltage deviation v ref (mv) junction temperature t j ( ) c junction temperature t j ( ) c
2007. 9. 18 4/4 KIA278R000P5 revision no : 1 fig. 11 i out - r.r ripple rejection ration r.r. (db) output current i o (a) 0.0 30 35 40 45 50 55 60 65 70 75 80 0.2 0.4 0.6 0.8 1.0 2.0 1.8 1.6 1.4 1.2 fig. 12 p d - ta power dissipation p d (w) 0 5 10 15 20 -25 0 150 50 100 fig.10 f rip - r.r input ripple frequency f in (khz) ripple rejection r.r (db) thermal resistance j-c 8.33 j-a 83.3 c/w ei(rms)=0.5v, f=120hz v in =v o (typ.)+2v, v c =2.7v c o =47 f, ta=25 c, r 1 =1k ? , r 2 =1.4k ? 0.0 30 35 40 45 50 55 60 65 70 75 80 0.2 0.4 0.6 0.8 1.0 2.0 1.8 1.6 1.4 1.2 ei(rms)=0.5v, f=120hz, v c =2.7v v in =v o (typ.)+2v, c o =47 f, ta=25 c, r 1 =1k ? , r 2 =1.4k ? ambient temperature ta ( ) c
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