technical data IL2931CD low-powered adjustable voltage regulator s o ( m s -012a a ) 4 3 2 1 8 1 with low drop-out voltage ic IL2931CD is an adjustable voltage regulator of positive polarity with low drop-out voltage. ic is purposed for form ation of tem p erature- constant voltage of the value set by external resistive divider in the range from 3 to 24 v and used in the supply of electronic equipm ent. ? output voltage 3-24v. ? drop-out voltage not less than 0,2v at load current of 10 m a and less than 0,6v at load current of 100 m a . ? internal lim itation of m a xim u m load current. ? protection against overvoltage of positive and negative polarity ? tem p erature protection table 1 - pins purpose of ic in 8-pin so package pin no. purpose nam e 0 1 o u t p u t o u t p u t 02,03,06,07 com m o n g r o u n d 0 4 a d j u s t m e n t a d j u s t 05 disconnection output output inhibit 0 8 i n p u t i n p u t table 2 - maxim u m and absolute m a xim u m operation conditions p a r a me t e r u n i t m a x i mu m mo d e a b s o l u t e ma x i mu m mo d e mi n ma x mi n ma x junct i on t e m p erat ure, j o c - 4 0 1 2 5 - - storage tem p erature, stg o c - - - 6 0 1 5 0 input vol t a ge, u i v u o + 0 , 6 2 6 - 1 5 4 0 input vol t a ge, u i( ) , 100 m s v -50 60 out put current , i o m a - 1 0 0 - 1 0 0 resistance junction-case, r jc / w - 25(t y p . ) - 25(t y p . ) resistance junction-am bient, r ja / w - 160(t y p . ) - 160(t y p . ) 1
IL2931CD v o input v i out put i l 2931c d out put inhibit d1 r2 r1 51 ? sa 1 08 01 2 04 02, 03, 0 6, 07 05 c2 c1 ad j u s t ground i b 1 r3 i ad j 1, 2 - input and output capacitance, d1 - ic, r1, r2, r3 - resistors, sa1 - switch (in position 1 - output is ? on? , in position 2 - output is ? o ff? ). output voltage is defined from form ula: vv r r i r or e f a d j () 1 3 2 3 , (1) where resistors r2, r3 m u st m eet the following condition: 22 5 23 23 , ? rr rr t u , where - reference voltage, v ref r 2 , r 3 - resistors, i ad j - adjustm e nt current (2) figure 1 - connection circuit of adjustable voltage regulator 2
IL2931CD table 3 - electrical param e ters (u i =14v, u o = 3,0v, i o = 10m a, r 2 = 27 kohm , (unl ess speci fi ed ot herwi s e) p a r a me t e r , s y mb o l r a t e t e mp e - uni t test condi t i o n s m i n m a x rat u r e t j , o c r e ference vol t a ge *, v u ref i o =10m a 1 , 1 4 1 , 2 6 25 10 i o 100m a 1 , 0 8 1 , 3 2 -40 125 out put vol t a ge, v u o range - 3 24 - 25 10 out put vol t a ge versus i nput vol t a ge, m v / v r e gl i n e (u o +0,6) v< u i < 26 v - 1,5 25 10 out put vol t a ge versus l o ad current , %/ v r e gl oad 5m a < i o < 100m a - 1,0 25 10 c onsum pt i on current , m a i b i o =10m a - 1 , 0 25 10 out put i s ? o ff? (u th(oi) =2,5 v) - 1 , 0 25 10 pul s e-sm oot hi ng rat i o , %/ v r r f = 120 hz 0,10 - 25 10 drop-out vol t a ge, v u ds i o =10m a - 0 . 2 25 10 i o =100m a - 0 . 6 25 10 m a xi m u m i nput vol t a ge t h reshol d, v u th (ov) 2 6 4 0 25 10 out put vol t a ge at negat i v e i nput vol t a ge, v -u o u i = -15 v -0.3 - 25 10 vol t a ge t h reshol d of di sconnect i on out put , v u th (oi) out put i s ? on? - 1,9 25 10 1 , 2 -40 125 out put i s ? o ff? 2,5 - 25 10 3 , 2 5 - -40 125 di sconnect i on out put current , m k a i th (oi) u th (oi) = 2,5 v - 50 25 10 no tes: 1. m easurem ent of el ect ri cal param e t e rs i s conduct e d wi t h capaci t a nce c i =0.1m k f connect ed on i nput and c =100m kf - on out put . 2. *- r e ference vol t a ge i n adjust abl e regul at or i s m easured bet w een out put s out put and adjust on resi st ance r 2 (fi gure 1). 3. param e t e rs st i pul at ed i n t a bl e 3 are guarant eed for const a nt junct i on t e m p erat ure t j . param e t e rs m easurem ent shoul d be perform ed usi ng pul se equi pm ent . table 4 - typical values of electrical param e ters (u i =14 , u o = 3,0 , i o = 10 ? , r 2 = 27 ? , unl ess specified otherwise) param e t e r s y m b o l t e s t typical value tem p erature uni t condi t i o n s t j , o c output resistance, mo h m / v z o ? i o =1,0m a , f=10hz 100khz 4 0 2 5 10 c onsum pt i on current , m a i b i o = 100 m a 6,0 25 10 adjust m e nt current , m k a i adj 0 , 2 25 10 noi s e vol t a ge on out put , m v / v u n f=10 hz 100 khz; 140 25 10 tem p o r ary u n s tab ility o f o u t p u t vol t a ge, %/ 1000h s - 0 , 4 25 10 no tes: m easurem ent of el ect ri cal param e t e rs i s conduct e d wi t h capaci t a nce c i =0.1m k f connect ed on i nput and c =100 m k f - on out put . 3
IL2931CD d su f f i x so i c (m s - 0 1 2 a a ) sy m b o l m i n m a x a 4. 8 5 b 3. 8 4 c 1. 35 1. 75 d 0. 33 0. 51 f 0. 4 1 . 2 7 g h j 0 8 no t e s : k 0. 1 0 . 2 5 1. d i m e ns i ons a a n d b d o no t i n c l ud e m o l d f l a s h o r p r ot r u s i o n . m 0. 19 0. 25 2. m a x i m u m m o l d f l a s h o r p r o t r u s i o n 0. 15 m m ( 0 . 006) p e r s i d e p 5. 8 6 . 2 fo r a ; fo r b ? 0. 25 m m ( 0 . 010) p e r s i d e . r 0. 25 0. 5 1. 27 5. 72 d i me n s i o n , mm a b h c k c m j f m p g d r x 4 5 se a t i n g pl a n e 0 . 25 (0 . 0 10 ) m t -t - 1 8 4 5 4
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