1 b l 78a05 positive voltage regulators ww w . b ellin g . c o m . c n b elli n g p r o p r i e ta r y in f o r m a t i o n. u n a u t h or iz e d p h o t o c o p y a n d d u p li c a t i o n p r o h i b i t e d ? 2 0 12 b elling a ll ri g h t s re s e r v e d 1. features ? o u t p u t c u rre n t t o 1 .5 a ? o u t p u t v o lt ag e o f 5 v ? ther m al over l oad pr o te c t i on ? short c irc u it p rote c t i on ? o u t p ut trans i t i on soa pro te ct i on 2. description t he bl78a05 o f t h r ee - t e r mi n a l p o s iti v e reg u lat o r s i s avai l ab le i n to - 2 20 p a ck a ge, ma k i ng it u s ef u l in a wide range of appl i c atio n s . th es e regu l ators can provide l a cal o n - c a rd regu l ation, eliminating the distri b u ti o n proble m s associate d w it h singl e p oin t regulation . eac h t y pe e m pl o y s int e rna l curren t l i m iti n g , ther m a l s hu t - do wn a n d s afe area p r o t e ct i on , m a k i n g i t esse n t ia l ly in d estr u ct i b l e. if ade q ua t e h e at s i n k i n g is p rov i de d , the y ca n delive r o v e r 1. 5 a out pu t cu rr ent . althoug h des i gne d pr i m ari l y a s fixe d volt a g e regula t ors , thes e d e v i ces c an b e u s e d wi t h e x t er n al co m ponents t o ob t a i n ad j u s ta b le v o lt a ge a n d curr e nts blo c k di a g r a m
2 b l 78a05 positive voltage regulators ww w . b ellin g . c o m . c n b elli n g p r o p r i e ta r y in f o r m a t i o n. u n a u t h or iz e d p h o t o c o p y a n d d u p li c a t i o n p r o h i b i t e d ? 2 0 12 b elling a ll ri g h t s re s e r v e d sche m atic d ia g ram 3.max i mum ratings a b s ol u t e maxi m u m ratings s y mbol p ar am e t e r v a l ue unit v i d c i np u t v o l t a g e v o = 5 v 35 v i o output current inte r n ally limited p d p o w e r dis s ipat i o n inte r n ally limited t stg storage tem p e r ature r a n g e - 40 to 125 c t op op e r ati n g j u nction tem pe r atu r e r a n g e bl78a 05 0 to 125 c n o t e : ab s o l u te maxi m u m r a ti ng s a r e t h o s e v al u es b e y o nd w h ich d a m a g e to t h e d e v i c e m a y oc c u r . f u nc tio n al o p e r a t i o n u n d e r these c o n d ition is n o t impli ed .
3 b l 78a05 positive voltage regulators ww w . b ellin g . c o m . c n b elli n g p r o p r i e ta r y in f o r m a t i o n. u n a u t h or iz e d p h o t o c o p y a n d d u p li c a t i o n p r o h i b i t e d ? 2 0 12 b elling a ll ri g h t s re s e r v e d 4.electr i cal charac t erist i cs el e c t r i c al c h a ra c t e r is t ics o f bl78a05 (r e f e r to the t es t c ir c uit s , t j = - 40 to 125 c , v i = 11 v , i o = 5 00 ma , c i = 0 . 3 3 f , c o = 0 . 1 f un l e ss o t h e rwise s p eci f ied) s y m b ol parameter t e st conditi o n s min. t y p. max. unit v o output voltage t j = 25c 4.85 5 5.15 v v o output voltage i o = 5 ma to 1 a, p o ? 15 w v i = 8 to 20 v 4 .65 5 5.35 v ? v o(1) li n e reg u lat i on v i = 7 to 25 v, t j = 25c 3 50 mv v i = 8 to 12 v, t j = 25c 1 25 ? v o(1) lo a d re g u lat io n i o = 5 ma to 1 . 5 a, t j = 25c 100 mv i o = 250 to 750 ma, t j = 25c 25 i d quiescent current t j = 25c 8 m a ? i d quiesc e nt current cha n ge i o = 5 ma to 1 a 0.5 ma v i = 8 to 25 v 0.8 ? v o /?t output voltage drift i o = 5 ma 0.6 mv/c en output noi s e volta g e b =10 hz to 100 khz, t j = 25 c 40 v/v o svr sup p ly volt a ge rejecti o n v i = 8 to 18 v, f = 120 hz 68 db v d dro p out volt ag e i o = 1 a, t j = 2 5c 2 2.5 v r o output resistance f = 1 khz 17 m i sc short circuit current v i = 35 v, t j = 25c 0.75 1.2 a i s c p short circuit peak current t j = 25c 1 .3 1.9 2 .2 a 1. load and line re g ul a tion a re spe c ified at constant junction tem p erature. c h an g es in v o due to h e a ting e ffects must be taken into acco u nt se p arate l y . p u l s e testing w i th l o w d u t y c y cle is used.
4 b l 78a05 positive voltage regulators ww w . b ellin g . c o m . c n b elli n g p r o p r i e ta r y in f o r m a t i o n. u n a u t h or iz e d p h o t o c o p y a n d d u p li c a t i o n p r o h i b i t e d ? 2 0 12 b elling a ll ri g h t s re s e r v e d 5 . t est ci r c uits d c pa r a m et er l o a d re gu l a t ion ripple rejection
5 b l 78a05 positive voltage regulators ww w . b ellin g . c o m . c n b elli n g p r o p r i e ta r y in f o r m a t i o n. u n a u t h or iz e d p h o t o c o p y a n d d u p li c a t i o n p r o h i b i t e d ? 2 0 12 b elling a ll ri g h t s re s e r v e d 6. p a c k a g e me c h anical data notes: a) confirms t o jedec t o - 220 v ari a tion ab except where noted b) all dimensions are in millimeters. c) dimensions are exclusive of burrs, mold fla s h, and tie bar extrusio n s.
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