e l ek tr on isch e b a u e lemen te S3U1117A 1a low dropout positive adjustable or fixed-mode regulator d e s c r i p t i o n the s 3u1117a is a low dropout at positive adjustable or fixed-mode regulator with min. of 1a output current capability. the product is specifically designed to provide well-regulated supply for low voltage ic applications such as high-speed bus termination and low current 3.3v logic supply. s 3u1117a is also well suited for other applications such as vga cards. s 3u1117a is guaranteed to have lower than 1.4v dropout at full load current making it ideal to provide well regulated outputs of 1.25 to 5 with 6.4v to 12v input supply. * 3-terminal adjustable or f ixed 1.5v,1.8v,2.5v,3.3v,5.0v f e a t u r e s * 1.4 v max. dropout full load current * output current limiting * good noise rejection * fast transient response * built-in thermal shutdown 01 -jun-2002 rev. a page 1 of 4 http://www.secosgmbh.com/ any changing of specification will not be informed individual r o h s c o m p l i a n t p r o d u c t typical circuit millimeter ref. min. max. ref. min. max. a 4.40 4.80 c2 1.25 1.45 b 0.76 1.00 b2 1.17 1.47 l4 0.00 0.30 b d 8.6 9.0 c 0.36 0.5 e 2.54 ref. l3 1.50 ref. l 14.6 15.8 l1 2.29 2.79 0? 8? e 9.80 10.4 l2 1.27 ref. millimeter
d c s u p p l y v o l t a g e p o w e r d i s s i p a t i o n s t o r a g e t e m p e r a t u r e r a n g e o p e r a t i n g j u c t i o n t e m p e r a t u r e r a n g e p a r a m e t e r s y m b o l r a t i n g s u n i t v v i n - 0 . 3 t o 1 2 0 ~ + 1 5 0 - 6 5 ~ + 1 5 0 a b s o l u t e m a x i m u m r a t i n g s p d t s t t o p c o c o i n t e r n a l l y l i m i t e d p i n d e s c r i p t i o n s e l e k t r o n i s c h e b a u e l e m e n t e h t t p : / / w w w . s e c o s g m b h . c o m / a n y c h a n g i n g o f s p e c i f i c a t i o n w i l l n o t b e i n f o r m e d i n d i v i d u a l 01-jun-2002 rev. a page 2 of 4 f u n c t i o n pin# i / o n a m e a d j ( g n d ) i 1 a r e si s t o r d i v i d e r f r o m t h i s p i n t o t h e v o u t p i n a n d g r o u n d se t s t h e o u t p u t vo l t a g e ( g r o u n d o n l y f o r f i x e d m o d e ) v o u t o 2 t h e o u t p u t o f t h e r e g u l a t o r . a m i n i m u m o f 1 0 u f ca p a ci t o r m u st b e co n n e ct e d f r o m t h i s p i n t o g r o u n d t o i n su r e st a b i l i t y . v i n i 3 t h e i n p u t p i n o f r e g u l a t o r . t yp i ca l l y a l a r g e s t o r a g e ca p a c i t o r i s co n n e ct e d f r o m t h i s p i n t o g r o u n d t o i n su r e t h a t t h e i n p u t vo l t a g e d o e s n o t sa g b e l o w t h e m i n i m u m d r o p o u t vo l t a g e d u r i n g t h e l o a d t r a n s i e n t r e sp o n se . t h i s p i n m u st a l w a ys b e 1 . 3 v h i g h e r t h a n v o u t i n o r d e r f o r t h e d e vi ce t o r e g u l a t e p r o p e r l y . block diagram s 3u 1117a 1a low dropout positive adjustable or f i xed-mode regulator
01-jun-2002 rev. a page 3 of 4 h t p : / / w w w . s e c o s g m b h . c o m / a n y c h a n g i n g o f s p e c i f i c a t i o n w i l l n o t b e i n f o r m e d i n d i v i d u a l e l e k t r o n i s c h e b a u e l e m e n t e e l e c t r i c a l c h a r a c t e r i s t i c s p a r a m e t e r c o n d i t i o n s m i n t y p m a x u n i t s 3 u 1 1 1 7 a - 1 . 5 i o = 1 0 m a , t j = 2 5 , 3 v v i n 1 2 v 1 . 4 7 0 1 . 5 0 0 1 . 5 3 0 v s 3 u 1 1 1 7 a - 1 . 8 i o = 1 0 m a , t j = 2 5 , 3 . 3 v v i n 1 2 v 1 . 7 6 4 1 . 8 0 0 1 . 8 3 6 v s 3 u 1 1 1 7 a - 2 . 5 i o = 1 0 m a , t j = 2 5 , 4 v v i n 1 2 v 2 . 4 5 0 2 . 5 0 0 2 . 5 5 0 v s 3 u 1 1 1 7 a - 3 . 3 i o = 1 0 m a , t j = 2 5 , 4 . 8 v v i n 1 2 v 3 . 2 3 5 3 . 3 0 0 3 . 3 6 5 v o u t p u t v o l t a g e s 3 u 1 1 1 7 a - 5 . 0 i o = 1 0 m a , t j = 2 5 , 6 . 5 v v i n 1 2 v 4 . 9 0 0 5 . 0 0 0 5 . 1 0 0 v l i n e r e g u l a t i o n s 3 u 1 1 1 7 a - x x x i o = 1 0 m a , v o u t + 1 . 5 v < v i n < 1 2 v , t j = 2 5 - - 0 . 2 % s 3 u 1 1 1 7 a a d j v i n = 3 . 3 v , v a d j = 0 , 0 m a < i o < 1 a , t j = 2 5 (n o t e 1 , 2 ) - - 1 % s 3 u 1 1 1 7 a - 1 . 5 v i n = 3 v , 0 m a < i o < 1 a , t j= 2 5 (n o t e 1 , 2 - 1 2 1 5 m v s 3 u 1 1 1 7 a - 1 . 8 v i n = 3 . 3 v , 0 m a < i o < 1 a , t j = 2 5 (n o t e 1 , 2 ) - 1 5 1 8 m v s 3 u 1 1 1 7 a - 2 . 5 v i n = 4 v , 0 m a < i o < 1 a , t j= 2 5 (n o t e 1 , 2 ) - 2 0 2 5 m v s 3 u 1 1 1 7 a - 3 . 3 v i n = 5 v , 0 m a < i o < 1 a , t j= 2 5 (n o t e 1 , 2 ) - 2 6 3 3 m v l o a d r e g u l a t i o n s 3 u 1 1 1 7 a - 5 . 0 v i n = 8 v , 0 m a < i o < 1 a , t j= 2 5 (n o t e 1 , 2 ) - 4 0 5 0 m v d r o p o u t v o l t a g e ( v i n - v o u t ) s 3 u 1 1 1 7 a - x x x i o = 1 a , ( v o u t = 0 . 1 % v o u t ) - 1 . 3 1 . 4 v reference voltage S3U1117Aadj 1.225 1.250 1.275 v i o = 1 0 m a , t j = 2 5 , ( v i n - v o u t ) = 1 . 5 v c u r r e n t l i m i t s 3 u 1 1 1 7 a - x x x v i n - v o u t = 5 v 1 . 1 - - a m i n i m u m l o a d c u r r e n t s 3 u 1 1 1 7 a - x x x 0 t j 1 2 5 - m a t h e r m a l r e g u l a t i o n t a = 2 5 , 3 0 m s p u l se - 0 . 0 0 8 0 . 0 4 % / w f = 1 2 0 h z , c o u t = 2 5 u f t a n t a l u m , i o u t = 1 a r i p p l e r e j e ct i o n s 3 u 1 1 1 7 a - x x x v i n = v o u t + 3 v - 6 0 7 0 d b t e m p e r a t u r e s t a b i l i t y i o = 1 0 m a - 0 . 5 - % j a t h e r m a l r e si st a n ce ju n ct i o n C t o - a m b i e n t ( n o h e a t s i n k ; n o a i r f l o w ) - 9 1 - / w j c t h e r m a l r e si st a n ce ju n ct i o n - t o - c a se c o n t r o l c i r cu i t r y / p o w e r t r a n s i s t o r - 1 0 - / w n o t e 1 : s e e t h e r m a l r e g u l a t i o n sp e ci f i ca t i o n s f o r ch a n g e s i n o u t p u t vo l t a g e d u e t o h e a t i n g e f f e ct s . l i n e a n d l o a d r e g u l a t i o n a r e m e a su r e d a t a co n st a n t j u n ct i o n t e m p e r a t u r e b y l o w d u t y cyc l e p u l se t e st i n g . l o a d r e g u l a t i o n i s m e a su r e d a t t h e o u t p u t l e a d = 1 / 1 8 f r o m t h e p a cka g e . n o t e 2 : l i n e a n d l o a d r e g u l a t i o n a r e g u a r a n t e e d u p t o t h e m a x i m u m p o w e r d i ss i p a t i o n o f 1 5 w . p o w e r d i ss i p a t i o n i s d e t e r m i n e d b y t h e d i f f e r e n ce b e t w e e n i n p u t a n d o u t p u t a n d t h e o u t p u t cu r r e n t . g u a r a n t e e d m a x i m u m p o w e r d i ss i p a t i o n w i l l n o t b e a va i l a b l e o ve r t h e f u l l i n p u t / o u t p u t r a n g e . n o t e 3 : q u i e sce n t cu r r e n t i s d e f i n e d a s t h e m i n i m u m o u t p u t cu r r e n t r e q u i r e d i n m a i n t a i n i n g r e g u l a t i o n . a t 1 2 v i n p u t / o u t p u t d i f f e r e n t i a l t h e d e vi ce i s g u a r a n t e e d t o r e g u l a t e i f t h e o u t p u t c u r r e n t i s g r e a t e r t h a n 1 0 m a . 5 10 s 3u 1117a 1a low dropout positive adjustable or f i xed-mode regulator
01-jun-2002 rev. a page 4 of 4 h t p : / / w w w . s e c o s g m b h . c o m / a n y c h a n g i n g o f s p e c i f i c a t i o n w i l l n o t b e i n f o r m e d i n d i v i d u a l e l e k t r o n i s c h e b a u e l e m e n t e c h a r a c t e r i s t i c s c u r v e s 3u 1117a 1a low dropout positive adjustable or f i xed-mode regulator
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