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ame 1 AME8882 rev . a.03 low dropout 2a cmos regulator n t ypical application n function al block di agra m the AME8882a/b fa mily of positive cmos line ar regu- lators provides ultra low-dropout voltage (240mv @2a)a nd low quie scent current (typically 600ua), thus ma king them ideal for power-saving system. these rugged de-vice s have both thermal shutdown a nd current li mit to prevent device failure under the "worst" of operating con-dition s. the AME8882a/b also provide s ss ti me in or- der to reduce inrush current in dif ferent a pplication s. l motherboard application n general de scri ption n fe ature s n application s l low dropout v oltage: 240mv @2a, 25 o c l adjusta ble output v oltage (0.8v to 3.3v) l high output accura cy + 1.5% l support low esr multi-layer cera mic ca pa citors (mlcc) application l power good output l fa st t ra n sient re spon se l soft-start function l over-t e mperature shutdown with hystere sis l current li miting a nd short current li mit protection l green products meet rohs sta ndards l notebook application l front side bus vtt(1.2v/2a) o u t a d j i n e n v c n t l g n d p g v o u t 1 0 0 k 1 m f 1 0 m f v i n c h i p e n a b l e v o u t v c n t l 1 0 m f r 1 r 2 v o u t = 0 . 8 x r 1 + r 2 r 2 a m e 8 8 8 2 p o r e n v c n t l o c p o t p d r i v e r 0 . 7 2 v e r r o r a m p l i f i e r i n o u t a d j p g g n d 0 . 8 v o u t a d j i n e n v c n t l g n d p g v o u t 1 0 0 k 1 m f 1 0 m f v i n c h i p e n a b l e v o u t v c n t l 1 0 m f r 1 r 2 v o u t = 0 . 8 x r 1 + r 2 r 2 a m e 8 8 8 2
ame 2 low dropout 2a cmos regulator AME8882 rev . a.03 n pin configuration sop-8/pp t op v iew AME8882x-xxxadj1. pg 2. en 3. in 4. vcntl5. nc 6. out7. adj 8. gnd n pin configuration note: connect exposed pad (heat sink on the back) to gnd. df n-10b (3mmx3mmx0.75mm) t op v iew AME8882x-xxxadj1. out 2. out 3. out 4. adj 5. pg6. en 7. in 8. in 9. in 10. vcntl 1 3 2 4 a m e 8 8 8 2 5 6 7 8 9 8 7 1 2 3 4 a m e 8 8 8 2 5 6 1 0 s o p - 8 / p p d f n - 1 0 b 1 5 p g p o w e r g o o d o p e n d r a i n o u t p u t . 2 6 e n e n a b l e i n p u t ( a c t i v e - h i g h ) . 3 7 , 8 , 9 i n i n p u t v o l t a g e . 4 1 0 v c n t l c o n t r o l i n p u t v o l t a g e . 5 n / a n c n o i n t e r n a l c o n n e c t i o n . 6 1 , 2 , 3 o u t o u t p u t v o l t a g e . 7 4 a d j s e t t h e o u t p o t v o l t a g e b y t h e e x t e r n a l f e e d b a c k r e s i s t o r s . 8 1 1 g n d g r o u n d . p i n n u m b e r p i n n a m e p i n d e s c r i p t i o n ( ) 2 2 1 8 . 0 r r r v v o u t + = ( ) 2 2 1 8 . 0 r r r v v o u t + =
ame 3 AME8882 rev . a.03 low dropout 2a cmos regulator n ordering information number of pins pa ck age t ype pin configuration AME8882x - x x x xxx output v oltage enable pin function e n a b l e p i n f u n c t i o n a : i n t e r n a l p u l l h i g h a 1 . p g v : d f n a : 8 a d j : a d j u s t a b l e b : i n t e r n a l p u l l l o w ( s o p - 8 / p p ) 2 . e n z : s o p / p p b : 1 0 3 . i n 4 . v c n t l 5 . n c 6 . o u t 7 . a d j 8 . g n d a 1 . o u t ( d f n - 1 0 b ) 2 . o u t 3 . o u t 4 . a d j 5 . p g 6 . e n 7 . i n 8 . i n 9 . i n o u t p u t v o l t a g e 1 0 . v c n t l p i n c o n f i g u r a t i o n p a c k a g e t y p e n u m b e r o f p i n s
ame 4 low dropout 2a cmos regulator AME8882 rev . a.03 n absolute m axi mum ratings n re commended operating condition s p a r a m e t e r m a x i m u m u n i t c o n t r o l i n p u t v o l t a g e , v c n t l 3 t o 6 p o w e r i n p u t v o l t a g e , v i n 1 t o 6 o u t p u t v o l t a g e , v o u t g n d - 0 . 3 t o v i n + 0 . 3 o t h e r p i n s - 0 . 3 t o v c n t l + 0 . 3 e l e c t r o s t a t i c d i s c h a r g e ( h b m ) 1 5 0 0 v e l e c t r o s t a t i c d i s c h a r g e ( m m ) 2 0 0 e l e c t r o s t a t i c d i s c h a r g e ( c d m ) 1 0 0 0 j u n c t i o n t e m p e r a t u r e 1 5 0 s t o r a g e t e m p e r a t u r e r a n g e - 6 5 t o + 1 5 0 v o c v p a r a m e t e r s y m b o l r a t i n g u n i t p o w e r i n p u t v o l t a g e v i n 1 t o 5 . 5 v c o n t r o l i n p u t v o l t a g e v c n t l 3 v t o 5 . 5 v a m b i e n t t e m p e r a t u r e r a n g e t a - 4 0 t o + 8 5 o c j u n c t i o n t e m p e r a t u r e r a n g e t j - 4 0 t o + 1 2 5 o c
ame 5 AME8882 rev . a.03 low dropout 2a cmos regulator n thermal information * me a sure q jc on ba ck side center of exposed pa d. ** mil-st d-202g210f p a r a m e t e r p a c k a g e d i e a t t a c h s y m b o l m a x i m u m u n i t s o p - 8 / p p 1 9 d f n - 1 0 b 8 . 5 s o p - 8 / p p 8 4 d f n - 1 0 b 6 5 s o p - 8 / p p 1 4 5 0 d f n - 1 0 b 1 5 4 0 2 6 0 o c o c / w m w q j c q j a p d l e a d t e m p e r a t u r e ( s o l d e r i n g 1 0 s e c ) * * 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 ) p o w e r d i s s i p a t i o n 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 c a s e ) c o n d u c t i v e e p o x y
ame 6 low dropout 2a cmos regulator AME8882 rev . a.03 n ele ctrical spe cif ication s v in =v out(nom) +0.5v , v cntl =v en =5v , i out =1ma, a nd c out =10 m f , c in =10 m f , unle ss otherwise noted. t ypical value s are at t a =25 o c. s y m b o l t e s t c o n d i t i o n m i n t y p m a x u n i t s v i n 1 5 . 5 v c n t l 3 5 . 5 2 . 7 0 . 2 v c n t l = 5 . 5 v 0 . 6 1 . 2 m a v a d j 0 . 7 8 8 0 . 8 0 . 8 1 2 v c n t l = 5 v , v i n = 3 . 3 v 0 . 8 v i n - v d r o p d v l i n e _ i n 1 . 2 v < v i n < 4 . 5 v v c n t l = v e n = 5 v i o u t = 0 a , v o u t = v a d j 0 . 0 1 0 . 1 % / v d v l o a d i o u t = 0 a ~ 2 a 0 . 8 1 . 5 % a v d r o p i o u t = 2 a , v c n t l = v e n = 5 . 0 v v o u t = v a d j 2 4 0 3 0 0 m v e n = l o w 1 5 0 w v e n h 1 . 4 v e n l 0 . 8 i e n v c n t l = v e n = 5 v 1 0 1 2 a m e 8 8 8 2 a i s h d n v e n = 0 v 5 1 0 a m e 8 8 8 2 b i s h d n v e n = 0 v 0 . 1 1 s o f t s t a r t t i m e 1 . 4 3 m s e n a b l e d u a l p o w e r o u t p u t v o l t a g e r a n g e p o r h y s t e r e s i s q u i e s c e n t c u r r e n t r e f e r e n c e v o l t a g e p o w e r i n p u t l i n e r e g u l a t i o n l o a d r e g u l a t i o n vv m a d r o p o u t v o l t a g e v o u t d i s c h a r g e r d s ( o n ) s u p p l y i n p u t v o l t a g e v f e e d b a c k v o l t a g e p a r a m e t e r p o w e r i n p u t v o l t a g e r a n g e c o n t r o l i n p u t v o l t a g e r a n g e p o r t h r e s h o l d e n p i n v o l t a g e h i g h e n p i n v o l t a g e l o w e n i n p u t c u r r e n t c o n t r o l i n p u t c u r r e n t i n s h u t d o w n
ame 7 AME8882 rev . a.03 low dropout 2a cmos regulator n ele ctrical spe cif ication s (contd.) note 1. quiescent current is defined by i q =i in -i out (i out =0ma) s y m b o l t e s t c o n d i t i o n m i n t y p m a x u n i t s v f b r i s i n g 9 0 v f b f a l l i n g 8 0 p g l o w v o l t a g e p g s i n k s 5 m a 0 . 3 5 0 . 7 v p g d e l a y t i m e 1 . 5 3 5 m s i l i m 3 v o u t < 0 . 3 v 1 . 5 t s d 1 6 0 d t s d 3 0 a o c p o w e r g o o d a n d d e l a y % p r o t e c t i o n f u n c t i o n p g t h r e s h o l d v o l t a g e f o r p o w e r g o o d p g t h r e s h o l d v o l t a g e f o r p o w e r n o t g o o d p a r a m e t e r c u r r e n t l i m i t s h o r t c i r c u i t c u r r e n t t h e r m a l s h u t d o w n t e m p e r a t u r e t h e r m a l s h u t d o w n h y s t e r e s i s
ame 8 low dropout 2a cmos regulator AME8882 rev . a.03 the AME8882a/b fa mily of positive cmos line ar regu- lators provides ultra low-dropout voltage, high output cur-rent with low ground current, very low in put voltage a nd very low dropout voltage at up to 2a. it operates with avin a s low a s 1v a nd vcntl voltage 3v with output volt- age progra mma ble a s low a s 0.8v . enablethe AME8882a/b ha s a dedicated en a ble pin, when this pin is in the logic low condition, the mos pa ss tra n- sistor shuts of f, a nd all intern al circuits are powered down. for AME8882a, the en pin is pulled up by a n intern al resistor to enable normal operation. so the regulator willbe turn on when en pin is floating. it is not necessary to use a n extern al pull up re sistor to save cost. for AME8882b, the en pin is pulled low by a n intern al resistor to enable normal operation. so the regulator willbe turn off when en pin is floating. it is not necessary to use a n extern al pull low re sistor to save cost. soft-startthe AME8882a/b fe ature s a soft start function that limits inrush current. the soft start time is typically 1.4ms. current-limitthe AME8882a/b contain s a n inde pendent current li mit a nd short circuit current prote ction to prevent da mage during fault condition s. the current li mit monitors a nd controls the pa ss tra n sistor's gate voltage, li miting the output current to higher tha n 3a. n detailed de scri ption short circuit current-limitthe short circuit current-limit function reduces the cur- rent-limit level down to 1.5a (typical) when short circuitconditions. thermal shutdowna thermal shutdown circuit limits the junction tempera- ture of AME8882a/b. when the junction te mperature exceeds 160 o c, the over-temperature protection circuit turn s of f the pa ss tra n sistor allowing the device to cool down, the pa ss tra n sistor turn s on again after the junc- tion temperature cools by 30 o c. power good and delaythe power good function is a n open-drain output. con- ne cts a 100k w pull up re sistor to vout to obtain a n output voltage. the pg pin will go high 3ms (typ) afterthe output voltage arrives at 90% of normal output volt- age.
ame 9 AME8882 rev . a.03 low dropout 2a cmos regulator n application inf ormation in put ca pa citor the in put ca pa cita nce is at le a st 10 m f located a s close a s possible to the ic is re commended. output ca pa citor the AME8882a/b is sta ble with a n output ca pa citor to ground of 10uf or gre ater . the output ca pa citor sele ction is de pendent on esr (equivalent serie s re sista nce) a nd ca pa cita nce of the out- put ca pa citor over the de sired operating te mperature. the ultra-low-esr ca pa citors (such a s cera mic chi p ca pa ci- tors) a nd low-esr bul k ca pa citors (such a s solid ta nta- lum, posca p, a nd aluminum ele ctrolytic ca pa citors) ca n all be used a s output ca pa citors. for a pplication s with large loa d current tra n sition s, low-esr bul k ca pa citors are normally re commended. de coupling cera mic ca pa ci- tors must be pla ced a s close a s possible to the loa d a nd ground pin s. the i mpeda nce of the layout must be mini- mized. setting output v oltage the output voltage is progra mmed by the re sistor di- vider connected to the fb pin. the output voltage isgiven by the following equation: the feedba ck re sistor of re sista nce value support > 100k ohm a nd no require f orward ca pa citor . ( ) 2 2 1 8 . 0 r r r v v o u t + = power dissipation the power dissi pation is def ined a s p d =(v in -v out ) x i out + v in x i q the maximum power dissipation depends on the ther- mal re sista nce of ic pa ck age, pcb materi al & pcb de- sign (the copper area of pad), the rate of surroundingairflow a nd te mperature dif ference between junction a nd a mbient. the maxi mum power dissi pation ca n be calculated by the following formula: note: operation junction temperature not exceed 125 o c ( ) j a a j m a x d t t p q - = ) (
ame 10 low dropout 2a cmos regulator AME8882 rev . a.03 n chara cterization curve loa d t ra n sient re spon se loa d t ra n sient re spon se v in line t ra n sient re spon se v in line t ra n sient re spon se v cntl line t ra n sient re spon se v cntl line t ra n sient re spon se time(500 m m m m m s /div) v in (1v/div) v out (20mv/div) time(500 m m m m m s /div) v out (20mv/div) v cntl (1v/div) time(500 m m m m m s /div) v cntl (1v/div) v out (20mv/div) v c n t l = 5 v , v i n = 1 . 8 v , v o u t = 1 . 2 v time (1ms/div) v out (20mv/div ) i out (1a/div) v c n t l = 5 v , v i n = 1 . 8 v , v o u t = 1 . 2 v time (1ms/div) v c n t l = 5 v , v o u t = 1 . 2 v , i o u t = 0 a v out (20mv/div) v in (1v/div) time(500 m m m m m s /div) v c n t l = 5 v , v o u t = 1 . 2 v , i o u t = 2 a v out (20mv/div ) i out (1a/div) v i n = 1 . 8 v , v o u t = 1 . 2 v , i o u t = 0 a v i n = 1 . 8 v , v o u t = 1 . 2 v , i o u t = 2 a
ame 11 AME8882 rev . a.03 low dropout 2a cmos regulator n chara cterization curve (contd.) start up form enable start up form v cntl start up form v in short circuit protection over current protection dropout v oltage vs. loa d current & t e mperature v o u t ( 1 v / d i v ) p g ( 1 v / d i v ) t i m e ( 1 m s / d i v ) v c n t l ( 5 v / d i v ) i i n ( 2 a / d i v ) i o u t = 2 a v o u t ( 1 v / d i v ) p g ( 1 v / d i v ) t i m e ( 2 m s / d i v ) v i n ( 1 v / d i v ) i i n ( 2 a / d i v ) i o u t = 2 a t i m e ( 1 m s / d i v ) v o u t ( 1 v / d i v ) p g ( 1 v / d i v ) e n ( 5 v / d i v ) i i n ( 2 a / d i v ) i o u t = 2 a i o u t ( 1 a / d i v ) t i m e ( 1 0 0 m m m m s / d i v ) v c n t l = 5 v , v i n = 1 . 8 v , v o u t = 1 . 2 v 0 5 0 1 0 0 1 5 0 2 0 0 0 0 . 2 0 . 4 0 . 6 0 . 8 1 1 . 2 1 . 4 1 . 6 1 . 8 2 . 0 d r o p o u t v o l t a g e ( m v ) l o a d c u r r e n t i o u t ( a ) - 4 0 o c 2 5 o c 1 2 5 o c 0 0 . 5 1 . 0 1 . 5 2 . 0 2 . 5 3 . 0 3 . 5 4 . 0 2 . 5 2 . 0 1 . 5 1 . 0 0 . 5 0 3 . 0 l o a d c u r r e n t i o u t ( a ) o u t p u t v o l t a g e v o u t ( v ) v i n = 3 . 3 v , v c n t l = 5 v
ame 12 low dropout 2a cmos regulator AME8882 rev . a.03 n chara cterization curve (contd.) short circuit current vs. t e mperature output v oltage vs. t e mperature quiescent current vs. t e mperature v cntl por thre shold v oltage vs. t e mperature v cntl standby current vs. t e mperature - 2 . 0 - 1 . 0 0 . 0 1 . 0 2 . 0 3 . 0 4 . 0 5 . 0 6 . 0 7 . 0 - 5 0 - 2 5 0 + 2 5 + 5 0 + 7 5 + 1 0 0 + 1 2 5 a m e 8 8 8 2 a a m e 8 8 8 2 b v c n t l = 5 v , v i n = 1 . 8 v , v o u t = 1 . 2 v t e mperature( o c) v cntl standby current ( m m m m m a) 0 . 4 0 . 5 0 . 6 0 . 7 0 . 8 0 . 9 1 . 0 - 4 0 - 2 5 - 1 0 + 5 + 2 0 + 3 5 + 5 0 + 6 5 + 8 0 + 9 5 + 1 1 0 + 1 2 5 v c n t l = 5 v , v i n = 1 . 8 v , v o u t = 1 . 2 v t e mperature( o c) quiescent current (ma) 1 . 1 5 1 . 1 7 1 . 1 9 1 . 2 1 1 . 2 3 1 . 2 5 - 4 0 - 2 5 - 1 0 + 5 + 2 0 + 3 5 + 5 0 + 6 5 + 8 0 + 9 5 + 1 1 0 + 1 2 5 v c n t l = 5 v , v i n = 1 . 8 v , v o u t = 1 . 2 v t e mperature( o c) 1 . 0 1 . 2 1 . 4 1 . 6 1 . 8 2 . 0 2 . 2 2 . 4 - 4 0 - 2 0 0 + 2 0 + 4 0 + 6 0 + 8 0 + 1 0 0 v c n t l = 5 v , v i n = 1 . 8 v , v o u t = 1 . 2 v t e mperature( o c) short circuit current (a) 2 . 4 0 2 . 4 5 2 . 5 0 2 . 5 5 2 . 6 0 2 . 6 5 2 . 7 0 2 . 7 5 2 . 8 0 2 . 8 5 2 . 9 0 - 4 0 - 2 5 - 1 0 + 5 + 2 0 + 3 5 + 5 0 + 6 5 + 8 0 + 9 5 + 1 1 0 + 1 2 5 r i s i n g f a l l i n g v i n = 1 . 8 v , v o u t = 1 . 2 v t e mperature( o c) por v oltage (v) output v oltage (v)
ame 13 AME8882 rev . a.03 low dropout 2a cmos regulator n t a pe a nd reel di men sion sop-8/pp carrier t a pe, number of components per reel a nd reel size df n-10b (3mmx3mmx0.75mm) carrier t a pe, number of components per reel a nd reel size p a c k a g e c a r r i e r w i d t h ( w ) p i t c h ( p ) p i t c h ( p 0 ) p a r t p e r f u l l r e e l r e e l s i z e s o p - 8 / p p 1 2 . 0 0 . 1 m m 8 . 0 0 . 1 m m 4 . 0 0 . 1 m m 2 5 0 0 p c s 3 3 0 1 m m p a c k a g e c a r r i e r w i d t h ( w ) p i t c h ( p ) p i t c h ( p 0 ) p a r t p e r f u l l r e e l r e e l s i z e d f n - 1 0 b ( 3 x 3 x 0 . 7 5 m m ) 1 2 . 0 0 . 1 m m 4 . 0 0 . 1 m m 4 . 0 0 . 1 m m 3 0 0 0 p c s 3 3 0 1 m m p i n 1 w p 0 a m e a m e p w p 0 p i n 1 a m e a m e p
ame 14 low dropout 2a cmos regulator AME8882 rev . a.03 n pa ck age di men sion sop-8/pp m i n m a x m i n m a x a 1 . 3 5 0 1 . 7 5 0 0 . 0 5 3 0 . 0 6 9 a 1 0 . 0 0 0 0 . 1 5 0 0 . 0 0 0 0 . 0 0 6 a 2 1 . 3 5 0 1 . 6 0 0 0 . 0 5 3 0 . 0 6 3 c 0 . 1 0 0 0 . 2 5 0 0 . 0 0 4 0 . 0 1 0 e 3 . 7 5 0 4 . 1 5 0 0 . 1 4 8 0 . 1 6 3 e 1 5 . 7 0 0 6 . 3 0 0 0 . 2 2 4 0 . 2 4 8 l 1 0 . 3 0 0 1 . 2 7 0 0 . 0 1 2 0 . 0 5 0 b 0 . 3 1 0 0 . 5 1 0 0 . 0 1 2 0 . 0 2 0 d 4 . 7 2 0 5 . 1 2 0 0 . 1 8 6 0 . 2 0 2 e q q q q 0 o 8 o 0 o 8 o e 2 2 . 1 5 0 2 . 5 1 3 0 . 0 8 5 0 . 0 9 9 d 1 2 . 1 5 0 3 . 4 0 2 0 . 0 8 5 0 . 1 3 4 1 . 2 7 0 b s c 0 . 0 5 0 b s c s y m b o l s m i l l i m e t e r s i n c h e s b e e e 2 c f r o n t v i e w s i d e v i e w t o p v i e w d 1 e 1 l 1 d a 1 a a 2 p i n 1
ame 15 AME8882 rev . a.03 low dropout 2a cmos regulator n pa ck age di men sion df n-10b (3mmx3mmx0.75mm) m i n m a x m i n m a x a 0 . 7 0 0 0 . 8 0 0 0 . 0 2 8 0 . 0 3 1 d 2 . 9 0 0 3 . 1 0 0 0 . 1 1 4 0 . 1 2 2 e 2 . 9 0 0 3 . 1 0 0 0 . 1 1 4 0 . 1 2 2 e 0 . 4 5 0 0 . 5 5 0 0 . 0 1 8 0 . 0 2 2 d 1 2 . 3 0 0 2 . 5 0 0 0 . 0 9 1 0 . 0 9 8 e 1 1 . 6 0 0 1 . 8 0 0 0 . 0 6 3 0 . 0 7 1 b 0 . 1 8 0 0 . 3 0 0 0 . 0 0 7 0 . 0 1 2 l 0 . 3 0 0 0 . 5 0 0 0 . 0 1 2 0 . 0 2 0 g 0 . 1 5 3 0 . 2 5 3 0 . 0 0 6 0 . 0 1 0 g 1 0 . 0 0 0 0 . 0 5 0 0 . 0 0 0 0 . 0 0 2 s y m b o l s m i l l i m e t e r s i n c h e s t o p v i e w b o t t o m v i e w r e a r v i e w e d e g g 1 b l e 1 d 1 p i n 1 i d e n t i f i c a t i o n a
life support policy: the se products of ame, inc. are not authorized f or use a s critical components in life-support device s or syste ms, without the expre ss written a pproval of the pre sident of ame, inc. ame, inc. re serve s the right to ma ke cha nge s in the circuitry a nd spe cif ication s of its device s a nd a dvise s its customers to obtain the late st version of releva nt inf ormation. ? ame, inc. , february 2014 document: a001a-ds8882-a.03 corporate he a dquarter ame, inc.8f , 12, w enhu st., ne i-hu t ai pe i 1 14, t aiwa n . t el: 886 2 2627-8687 fax: 886 2 2659-2989 www .a me.com.tw e-m ail: sale s@a me.com.tw

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