shantou huashan electronic devices co.,ltd . 3-terminal fixed vol t age regula t or h 7818 ? description th e h 7 8 18 s e r i e s o f t h r e e t e r m i n a l p o s i t i v e re gu la to rs ar e a v a i l a b le in th e t o - 2 20 pa ck ag e a nd wi th s e v e r a l f ixe d ou tp ut vol ta ge s, m aki ng t h e m u sef ul i n a wi de r a n ge of ap pl ic at io ns. e a c h t y p e e m p l o ys i n t e r n a l cu rr en t li mi ti ng , th er ma l sh ut d o w n a nd sa fe op er ati ng a r e a p rot ec ti on , ma ki ng i t e s s ent ia ll y i n d e s t r u c tib le . if ad equ at e he at sin ki ng i s p rov id ed , th ey c a n d e l i v er o v e r 1a ou tpu t cu rr en t. a l t h o u g h de si gn ed pr im ar il y a s f i x ed vo lt ag e r e g u l a t o r , t h e se de vi ce s c an be u s e d w i t h e x t e r n a l c o m p o n e n t s t o obtain adjustable voltages and currents. ? featur es 1 d input 2 d gnd 3 d output t o -220 o u tput current up to 1a o u tput v o ltages of 18v therm a l overload protection short circuit protection o u tput t r ansistor safe o p erating a r ea protection ? absolute maximum ratings ? t a =25 ??? v i ?a?a input v o ltag e (for v o =5v t o 18v) ?-?-?-?- ?-?- 35 v r | jc ?a?a ther m a l resistance ju nc tio n-ca ses ?-?-?-?- 5 ?? / w r | ja ?a?a therm a l resistance junction-air ?-?-?-?- 65 ?? / w t opr ?a?a o p erating t e m p erature range ?-?-?-?- ?- 0~125 ?? t stg ?a?a s t orage t e m p erature r a nge ?- ?-?-?-?- -65~150 ?? 1
shantou huashan electronic devices co.,ltd. h 7818 ? refer to test circuit, unless otherwise specified ? 0 ??? t j ? 125 ?? ,i o =500ma,v i =27v,c i =0.33 | f,c o =0.1 | f ? s y m b o l p a r a m e t e r m i n . typ. m a x . u n i t c o n d i t i o n s 1 7 . 3 1 8 1 8 . 7 t j =25 ?? v o output voltage 1 7 . 1 1 8 1 8 . 9 v 5.oma ? i o ? 1.0a, p d ? 15w, 21v ? v i ? 33v 1 5 3 6 0 t j =25 ?? , 21v ? v i ? 33v | v o line regulation (note1) 5 1 8 0 mv t j =25 ?? , 24v ? v i ? 30v 1 5 3 6 0 t j =25 ?? , 5.0ma ? i o ? 1.5a | v o load regulation (note1) 5 . 0 1 8 0 mv t j =25 ?? , 250ma ? i o ? 750ma i q quiescent c u r r e n t 5 . 2 8 m a t j =25 ?? 0 . 5 5ma ? i o ? 1.0a | i q qu ie sc en t c u r r e n t ch an ge 1 . 0 ma 21v ? v i ? 33v | v o / | t output voltage drift -1 mv/ ?? i o =5ma v n output noise voltage 110 | v t a =25 ?? , 10hz ? f ? 100khz rr ripple rejection 53 69 db f=120hz, 22v ? v i ? 32v v d d r o p o u t v o l t a g e 2 v i o =1a, t j =25 ?? r o output r e s i s t a n c e 2 2 m |? f = 1 k h z i sc short circuit current 250 ma v i =35v, t a =25 ?? i pk p e a k c u r r e n t 2 . 2 a t j =25 ?? 2
shantou huashan electronic devices co.,ltd. h 7818 ? 2 ? 1 ? 3 ? 4 ? ? 5 ? 6 ? 3
shantou huashan electronic devices co.,ltd. h 7818 8 ? 7 ? 10 ? 12 ? 9 ? 11 ? 13 ? 4
shantou huashan electronic devices co.,ltd. h 7818 5
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