d a t a s h e et 2 a 1 6 0 k h z 3 2 v b u c k d c / d c c o n v e r t e r w i t h c v / cc l o o p x l 2 005 f e a t u r e s n w i d e 8 v t o 32 v i n pu t v o l t a g e r a n g e n o u t p u t a d j u s t a b l e f r o m 0 . 8 v t o 26 v n m i n i m u m d r o p o u t 0 . 3 v n f i x e d 160 kh z s w i t c h i ng f r e qu e n c y n m a x im u m 2 a o u t p u t c u r r e n t c a p a b i l i t y n i n t e r n a l o p t i m i ze p o w e r m o s f et n e x c e l l e n t li n e a n d l o a d r e g u l a t i o n n h i g h e f f i c i e n c y up t o 9 2 % n tt l s h u t d o w n ca p a b i l i t y n e n p i n w i t h h y s t e r e s i s f u n c t i o n n w i t h o u t p u t c o n s t a n t c u r r e n t l oo p n b u i l t i n c o n s t a n t v o l t a g e ( c v ) l o o p n b u i l t i n c o n s t a n t c u rr e n t ( cc ) l o o p n b u i l t i n t h e r m a l s h u t d o w n f u n c t i o n n b u i l t i n o u t p u t s h o r t p r o t e c t i o n n s o p 8 p ac k a g e a pp li c a t i o n s n c a r c h a r g e r n b a t t e r y c h a r g e r g e n er a l d e s cr i pt i o n t h e x l 2005 i s a 160 k h z f i x e d f r e qu e n c y p w m b u c k ( s t e p - d o w n ) d c / d c c o n v e r t e r , ca p a b l e o f d r i v i ng a 2 a l o a d w i t h h i g h e ff i c i e n c y , l o w r i p p l e a n d e x c e l l e n t li n e a n d l o a d r e g u l a t i o n . r e q u i r i ng a mi n i m u m n u m b e r o f e x t e r n a l c o m p o n e n t s , t h e r e gu l a t o r i s s i m p l e t o u s e a n d i n c l u d e i n t e r n a l f r e q u e n c y c o m p e n s a t i o n a n d a f i x e d - f r e qu e n c y o s c i l l a t o r . t h e p w m c o n t r o l c i r c u i t i s a b l e t o a d j u s t t h e du t y r a t i o li n ea r l y f r o m 0 t o 10 0 % . a n e n a b l e f u n c t i o n , a n o v e r c u rr e n t p r o t e c t i o n f u n c t i o n i s b u i l t i n s i d e . a n i n t e r n a l c o m p e n s a t i o n b l o c k i s b u i l t i n t o mi n im i z e e x t e r n a l c o m p o n e n t c o u n t . f i gu r e 1 . p ac k a g e t y p e o f x l 2005 http://www.junyi-ic.com tel:0755-29955070 fax:0755-27858707 free datasheet http://
d a t a s h e et 2 a 1 6 0 k h z 3 2 v b u c k d c / d c c o n v e r t e r w i t h c v / cc l o o p x l 2 005 p i n c o n f i g u r a t i o n s f i gu r e 2 . p i n c o n f i gu r a t i o n o f x l 2005 ( t o p v i e w ) t a b l e 1 p i n d e s c r i p t i o n p i n n u m b er p i n n a me d e s c r i p t i o n 1 f b f ee d b a c k p i n ( f b ) . t h r o ug h a n e x t e r n a l r e s i s t o r d i v i d e r n e t w o r k , f ee d b ac k s e n s e s t h e o u t p u t v o l t a g e a nd r e gu l a t e s i t . t h e f ee d b a c k t h r e s h o l d v o l t a g e i s 0 . 8 v . 2 e n e n a b l e p i n . d r i v e e n p i n l o w t o t u r n o ff t h e d e v i ce , d r i v e i t h i g h t o t u r n i t o n . 3 o c s et o u t p u t c o n s t a n t c u r r e n t s e t p i n . 4 v i n s up p l y v o l t a g e i n pu t p i n . x l 2005 o p e r a t e s f r o m a 8 v t o 32 v d c v o l t a g e . b y p a ss v i n t o gnd w i t h a s u i t a b l y l a r g e ca p a c i t o r t o e l im i n a t e n o i s e o n t h e i n pu t . 5 , 6 s w p o w e r s w i t c h o u t p u t p i n ( s w ) . o u t p u t i s t h e s w i t c h n o d e t h a t s up p li e s p o w e r t o t h e o u t p u t . 7 , 8 gnd g r o u n d p i n . http://www.junyi-ic.com tel:0755-29955070 fax:0755-27858707 free datasheet http://
d a t a s h e et 2 a 1 6 0 k h z 3 2 v b u c k d c / d c c o n v e r t e r w i t h c v / cc l o o p x l 2 005 f u n c t i o n b l o c k f i gu r e 3 . f u n c t i o n b l o c k d i a g r a m o f x l 2005 o r d er i n g i n f o r m a t i o n p a r t n u m b e r m a r k i n g i d l e a d f r ee l e a d f r ee p a c k i n g t y p e x l 2005 e 1 x l 2005 e 1 t u b e p a c k ag e t e m p e r a t u r e r a n g e x l 2005 t r e 1 x l 2005 e 1 t a p e & r e e l x l s e m i p b - f r ee p r o d u c t s , a s d e s i g n a t e d w i t h e1 ! s u f f i x i n t h e p a r nu m b e r , a r e r o h s c o m p li a n t . a b s o l u t e m ax i m um r a t i n gs n o t e1 ! p a r a m e t e r s y m b o l v a l u e u n i t i n pu t v o l t a g e v i n - 0 . 3 t o 34 v f b p i n v o l t a g e v fb - 0 . 3 t o v i n v e n p i n v o l t a g e v e n - 0 . 3 t o v i n v s w p i n v o l t a g e v sw - 0 . 3 t o v i n v p o w e r d i s s i p a t i o n p d i n t e r n a l l y l i m i t e d m w t h e r m a l r e s i s t a n c e ( j u n c t i o n t o a m b i e n t , n o h e a t s i n k , f r ee a i r) r ja 100 # c / w o p e r a t i n g j u n c t i o n t e m p e r a t u r e t j - 40 t o 125 # c s t o r a g e t e m p e r a t u r e t s tg - 65 t o 150 # c l ea d t e m p e r a t u r e ( s o l d e r i n g , 10 s ec ) t le ad 260 # c e s d ( h b m ) > 2000 v http://www.junyi-ic.com tel:0755-29955070 fax:0755-27858707 free datasheet http://
d a t a s h e et 2 a 1 6 0 k h z 3 2 v b u c k d c / d c c o n v e r t e r w i t h c v / cc l o o p x l 2 005 n o t e 1: s t r e ss e s g r ea t e r t h a n t h o s e li s t e d u n d e r m a x i m u m r a t i n g s m a y c a u s e p e r m a n e n t d a m a g e t o t h e d e v i ce . t h i s i s a s t r e ss r a t i n g o n l y a n d f u n c t i o n a l o p e r a t i o n o f t h e d e v i c e a t t h e s e o r a n y o t h e r c o n d i t i o n s a b o v e t h o s e i n d i ca t e d i n t h e op e r a t i o n i s n o t i m p l i e d . e x p o s u r e t o a b s o l u t e m a x i m u m r a t i n g c o n d i t i o n s f o r e x t e n d e d p e r i o d s m a y a f f e c t r e li a b i l i t y . x l 2005 e l ec t r i c a l c h a r a c t er i s t i c s t a = 25 ; un l e ss o t h e r w i s e s p ec i f i e d . s y m b o l p a r a m e t er t e s t c o nd i t i o n m i n. t y p. m a x. u n it s y s t e m pa r a m e t e rs t e s t c i r c u it f i g u r e 4 v f b f ee d b a c k v o l t a g e v i n = 8 v t o 30 v , v o u t = 5 v i l o a d = 0 . 2 a 780 800 820 mv e f f i c i e n c y $ v i n = 12 v , v o u t = 5 v i o u t = 1 . 5 a - 90 - % e l ec t r i c a l c h a r a c t er i s t i c s ( dc p a r a m e t e r s ) v i n = 12 v , gnd = 0 v , v i n & gnd p a r a ll e l c o n n e c t a 100u f / 35 v ca p a c i t o r ; i o u t = 500 m a , t a = 25 ; t h e o t h e r s f l o a t i n g u n l e s s o t h e r w i s e s p e c i f i e d , s y s t e m p a r a m e t e r s r e f e r e n ce f i gu r e 4 . p a r a m e t e r s s y m b ol t e s t c o nd i t i o n m i n. t y p. m a x. u n i t i n pu t o p e r a t i o n v o l t a g e v i n 8 32 v s h u t d o w n s upp l y c u rr e nt i s t by v en = 0 v 60 200 u a q u i e s c e n t s upp l y c u rr e nt i q v en = 2 v , v fb = v i n 2 . 5 5 m a o s c i ll a t o r f r e qu e n c y f o s c 128 160 192 k h z e n p i n t h r e s h o l d v en h i g h ( r e g u l a t o r on ) l o w ( r e gu l a t o r o ff ) 1 . 7 1 . 1 v o u t p u t p o w e r p m o s r d s o n v fb = 0 v , v i n = 12 v , i sw = 2 a 60 80 m o hm o u t p u t v o l t a g e s e t v f b v o u t = ( 1 + r 2 / r 1 ) * v fb 0 . 78 0 . 8 0 . 82 v http://www.junyi-ic.com tel:0755-29955070 fax:0755-27858707 free datasheet http://
d a t a s h e et 2 a 1 6 0 k h z 3 2 v b u c k d c / d c c o n v e r t e r w i t h c v / cc l o o p x l 2 005 t y p i c a l a pp li c a t i o n c i r c u i t ( c a r c h a r g e r ) f i gu r e 4 . x l 2005 t y p i c a l a p p l i ca t i o n c i r c u i t ( c a r c h a r g e r) f i gu r e 5 . o u t p u t v o l t a g e v s o u t p u t c u rr e n t c u r v e http://www.junyi-ic.com tel:0755-29955070 fax:0755-27858707 free datasheet http://
d a t a s h e et 2 a 1 6 0 k h z 3 2 v b u c k d c / d c c o n v e r t e r w i t h c v / cc l o o p x l 2 005 f i gu r e 6 . o u t p u t c u rr e n t v s e ff i c i e n c y c u r v e f i gu r e 7 . rc s v s o u t p u t c u rr e n t s e l ec t c u r v e http://www.junyi-ic.com tel:0755-29955070 fax:0755-27858707 free datasheet http://
d a t a s h e et 2 a 1 6 0 k h z 3 2 v b u c k d c / d c c o n v e r t e r w i t h c v / cc l o o p x l 2 005 s c h o tt k y d i o d e s e l ec t i o n t a b l e c u rr e nt s u r f a c e m o u nt t h r o ug h h o le v r ( t h e s a m e a s s y s t e m m a x im u m i npu t v o l t a g e) 20 v 30 v 40 v 1 n 5817 1 n 5818 1 n 5819 1 a ss 12 ss 13 ss 14 1 n 5820 1 n 5821 1 n 5822 m br 320 m br 330 m br 340 s k 32 s k 33 s k 34 30 w q 03 30 w q 04 31 dq 03 31 dq 04 3 a s r 302 s r 303 s r 304 http://www.junyi-ic.com tel:0755-29955070 fax:0755-27858707 free datasheet http://
d a t a s h e et 2 a 1 6 0 k h z 3 2 v b u c k d c / d c c o n v e r t e r w i t h c v / cc l o o p x l 2 005 p ac k a g e i n f o rm at i o n s o p 8 p acka g e m ec h a n i ca l d i m e n s i o n s http://www.junyi-ic.com tel:0755-29955070 fax:0755-27858707 free datasheet http://
|
