23213 3 - terminal fixed vol t age regula t or H78L18 shantou huashan electronic devices co.,ltd . ? description h78l1 8 is th e t h r ee te rm in al p o s i t i v e re gu la to rs w i t h si ngl e c hip , an d i n a wi de ra ng e of ap pl ic at io ns ? it s upp li es fi xe d o u t p u t v o l t a g e s of 18 v, de li ve r ov er 10 0m a ou tp ut cu rr en t, an d e m p l o y s i n t e r n a l cur re nt l i m iti ng , th er mal s h u t do wn an d sa fe op er at in g area protection, making it essentially indestructible. 1 d output 2 d gnd 3 d input t o -92 ? featur es o u tput current up to 100m a low noise h i gh ripple rejection pow e r a m plify o u tput protection therm a l overload protection current o v erload protection and short circuit protection ? absolute maximum ratings ? t a =25 ??? v in ?a?a in put v o ltage ?- ?-?-?-?- ?-?-?-?- ?-?- 35 v t am b ?a?a operati n g t e m p erat ure ra nge ?-?-?-?-?- ?-?-?-?-?- -20~ 8 5 ?? t stg ?a?a s t orage t e m p erature range ?-?-?-?-?- ?- ?-?-?-?- ?- -55~150 ?? t j ?a?a junct i o n t e m p erature ?-?-?-?-?-?-?-?-?-?-?-?-?-?-?- -55~ 15 0 ?? ? i n t e r n a l b l o c k d i a g r a m soa protection therm a l protection circuit error am plifier reference v o ltage s t arting circuit series bypass elem ent current generator gnd 2 output 1 input 3
23213 3 - terminal fixed vol t age regula t or H78L18 shantou huashan electronic devices co.,ltd . ? t y pical application h 78l18 gnd output input ? electrical characteristics ? u nless otherwise specified, v in =27v,i o =40ma, 0 ??? t j ? 125 ?? ,c in =0.33 | f,c out =0.1 | f ? sy m bol parameter m i n . t y p . 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 ?? 1 7 . 1 1 8 . 9 21v ? v in ? 33v,1ma ? i o ? 40ma v o o u t p u t v o l t a g e 1 7 . 1 1 8 . 9 v 21v ? v in ? v max ,1ma ? i o ? 70ma 1 4 5 3 0 0 t j =25 ?? , 21v ? v in ? 33v | v o l i n e r e g u l a t i o n 1 3 5 2 5 0 mv t j =25 ?? , 22v ? v in ? 33v 3 0 1 7 0 t j =25 ?? ,1ma ? i o ? 100ma | v o l o a d r e g u l a t i o n 1 5 8 5 mv t j =25 ?? ,1ma ? i o ? 40ma i q qu ie sc en t cu rr en t 2 . 2 6 . 0 m a t j =25 ?? 1 . 5 21v ? v in ? 33v, | i q qu ie sc en t cu rr en t change 0 . 1 ma 1ma ? i o ? 40ma v n ou tp ut no is e voltage 1 5 0 | v t j =25 ?? ,10hz ? f ? 100khz r r r i p p l e r e j e c t i o n 3 4 4 8 d b t j =25 ?? ,23v ? v in ? 33v, f=120hz v d d r o p o u t v o l t a g e 1 . 7 v t j =25 ?? | v o / | t te mp er at ur e coefficient of v o - 1 . 8 mv/ ?? i o =5ma
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