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| c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 4 - o c t . , 2 0 1 0 a p l 5 9 2 0 w w w . a n p e c . c o m . t w 1 a n p e c r e s e r v e s t h e r i g h t t o m a k e c h a n g e s t o i m p r o v e r e l i a b i l i t y o r m a n u f a c t u r a b i l i t y w i t h o u t n o t i c e , a n d a d v i s e c u s t o m e r s t o o b t a i n t h e l a t e s t v e r s i o n o f r e l e v a n t i n f o r m a t i o n t o v e r i f y b e f o r e p l a c i n g o r d e r s . 2 a , u l t r a l o w d r o p o u t ( 0 . 2 4 v t y p i c a l ) l i n e a r r e g u l a t o r f e a t u r e s u l t r a l o w d r o p o u t - 0 . 2 4 v ( t y p i c a l ) a t 2 a o u t p u t c u r r e n t 0 . 8 v r e f e r e n c e v o l t a g e h i g h o u t p u t a c c u r a c y - 1 . 5 % o v e r l i n e , l o a d , a n d t e m p e r a t u r e r a n g e f a s t t r a n s i e n t r e s p o n s e a d j u s t a b l e o u t p u t v o l t a g e p o w e r - o n - r e s e t m o n i t o r i n g o n b o t h v c n t l a n d v i n p i n s i n t e r n a l s o f t - s t a r t c u r r e n t - l i m i t a n d s h o r t c u r r e n t - l i m i t p r o t e c t i o n s t h e r m a l s h u t d o w n w i t h h y s t e r e s i s o p e n - d r a i n v o u t v o l t a g e i n d i c a t o r ( p o k ) l o w s h u t d o w n q u i e s c e n t c u r r e n t ( < 3 0 m a ) s h u t d o w n / e n a b l e c o n t r o l f u n c t i o n s i m p l e s o p - 8 p p a c k a g e w i t h e x p o s e d p a d lead free and green devices available (rohs compliant) a p p l i c a t i o n s g e n e r a l d e s c r i p t i o n the APL5920 is a 2a ultra low dropout linear regulator. the ic needs two supply voltages, one is a control volt- age (v cntl ) for the control circuitry, the other is a main supply voltage(v in ) for power conversion, to reduce power dissipation and provide extremely low dropout voltage. the APL5920 integrates many functions. a power-on-re- set (por) circuit monitors both supply voltages on v cntl and v in pins to prevent erroneous operations. the func- tions of thermal shutdown and current-limit protect the device against thermal and current over-loads. a pok indicates that the output voltage status with a delay time set internally. it can control other converter for power sequence. the APL5920 can be enabled by other power systems. pulling and holding the en voltage below 0.4v shuts off the output. the APL5920 is available in a sop-8p package which features small size as sop-8 and an exposed pad to reduce the junction-to-case resistance to extend power range of applications. motherboards, vga cards notebook pcs add-in cards s i m p l i f i e d a p p l i c a t i o n c i r c u i t p i n c o n f i g u r a t i o n v cntl v out v in gnd vout vcntl pok vin en enable en pok APL5920 fb optional pok en vin vcntl 1 2 3 4 gnd fb vout nc 8 7 6 5 = exposed pad (connected to ground plane for better heat dissipation) sop-8p (top view) free datasheet http://www.datasheetlist.com/
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 4 - o c t . , 2 0 1 0 a p l 5 9 2 0 w w w . a n p e c . c o m . t w 2 o r d e r i n g a n d m a r k i n g i n f o r m a t i o n symbol parameter rating unit v cntl vcntl supply voltage (vcntl to gnd ) - 0. 3 ~ 6 v v in vin supply voltage ( vin to gnd ) - 0. 3 ~ 6 v v out v out to gnd voltage - 0. 3 ~ v i n +0.3 v pok to gnd voltage - 0. 3 ~ 7 v en, fb to gnd voltage - 0. 3 ~ v cntl +0.3 v p d power dissipation internally limited w t j maximum junction temperature 150 o c t stg storage temperature range - 65 ~ 150 o c t sdr maximum lead soldering temperature , 10 seconds 26 0 o c a b s o l u t e m a x i m u m r a t i n g s ( n o t e 1 ) t h e r m a l c h a r a c t e r i s t i c s symbol parameter typical value unit q ja junction - to - ambient resistance in f ree air (note 2 ) sop - 8p 50 o c/w q jc junction - to - case resistance in free air (note 3) sop - 8p 20 o c/w n o t e 2 : q j a i s m e a s u r e d w i t h t h e c o m p o n e n t m o u n t e d o n a h i g h e f f e c t i v e t h e r m a l c o n d u c t i v i t y t e s t b o a r d i n f r e e a i r . n o t e 3 : the ?thermal pad temperature? is measured on the pcb copper area connected to the thermal pad of package. n o t e : a n p e c l e a d - f r e e p r o d u c t s c o n t a i n m o l d i n g c o m p o u n d s / d i e a t t a c h m a t e r i a l s a n d 1 0 0 % m a t t e t i n p l a t e t e r m i n a t i o n f i n i s h ; w h i c h a r e f u l l y c o m p l i a n t w i t h r o h s . a n p e c l e a d - f r e e p r o d u c t s m e e t o r e x c e e d t h e l e a d - f r e e r e q u i r e m e n t s o f i p c / j e d e c j - s t d - 0 2 0 d f o r m s l c l a s s i f i c a t i o n a t l e a d - f r e e p e a k r e f l o w t e m p e r a t u r e . a n p e c d e f i n e s ? g r e e n ? t o m e a n l e a d - f r e e ( r o h s c o m p l i a n t ) a n d h a l o g e n f r e e ( b r o r c l d o e s n o t e x c e e d 9 0 0 p p m b y w e i g h t i n h o m o g e n e o u s m a t e r i a l a n d t o t a l o f b r a n d c l d o e s n o t e x c e e d 1 5 0 0 p p m b y w e i g h t ) . 1 2 3 4 8 7 6 5 measured point pcb copper n o t e 1 : a b s o l u t e m a x i m u m r a t i n g s a r e t h o s e v a l u e s b e y o n d w h i c h t h e l i f e o f a d e v i c e m a y b e i m p a i r 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 d e v i c e r e l i a b i l i t y . APL5920 handling code temperature range package code package code ka : sop-8p operating ambient temperature range i : -40 to 85 o c handling code tr : tape & reel assembly material g : halogen and lead free device assembly material APL5920 ka : APL5920 xxxxx xxxxx - date code free datasheet http://www.datasheetlist.com/ c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 4 - o c t . , 2 0 1 0 a p l 5 9 2 0 w w w . a n p e c . c o m . t w 3 r e c o m m e n d e d o p e r a t i n g c o n d i t i o n s symbol parameter range unit v cntl vcntl supply voltage 3. 0 ~ 5.5 v v in vin supply voltage 1. 2 ~ 5.5 v v out v out output voltage (when v cntl - v out >1.5v) 0.8 ~ v in ? v drop v i out vout output current 0 ~ 2 a r2 fb to gnd 1k ~ 24k w i out = 2a at 25% nominal v out 8 ~ 770 i out = 1a at 25% nominal v out 8 ~ 1400 c out vout output capacitance i out = 0.5a at 25% nominal v out 8 ~ 1700 m f esr cout esr of vout output capacitor 0 ~ 200 m w t a ambient temperature - 4 0 ~ 8 5 o c t j junction temperature - 4 0 ~ 125 o c 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 refer to the typical application circuits. these specifications apply over v cntl =5v, v in = 1.8 v, v out =1.2v, and t a = -40 ~ 85 o c, unless otherwise specified. typical values are at t j =25 o c. apl59 2 0 symbol parameter test conditions min . typ . max . unit supply current i vc ntl vcntl supply current en=vcntl , i out =0a - 1.0 1.5 ma i sd vcntl supply current at shutdown en=gnd - 20 30 m a vin supply current at shutdown en=gnd , v in = 5.5v - - 1 m a power - on - reset (por) rising vcntl por threshold 2.5 2.7 2.9 v vcntl por hysteresis - 0.4 - v rising vin por threshold 0.8 0.9 1.0 vin por hysteresis - 0.5 - v output voltage v ref reference voltage fb=vout , i out =10ma, t j =25 c 0.792 0.8 0.808 v output voltage accuracy i out = 0~2a, t j = - 40 ~125 o c - 1.5 - +1.5 % load regulation i out =0a ~2a - 0. 06 0.25 % line regulation i out = 1 0 m a, v cntl =3. 0 ~ 5.5 v - 0.15 - + 0. 15 % /v vout pull - low resistance v cntl =3.3v , v en =0v, v out < 0.8 v - 85 - w fb input current v fb =0.8v - 100 - 100 na drop out voltage s t j =25 o c - 0.26 0.32 v drop vin - to - vout dropout voltage v cntl =4.5v, i out =2a v out =2.5v t j = - 40~125 o c - - 0.44 v free datasheet http://www.datasheetlist.com/ c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 4 - o c t . , 2 0 1 0 a p l 5 9 2 0 w w w . a n p e c . c o m . t w 4 r e f e r t o t h e t y p i c a l a p p l i c a t i o n c i r c u i t s . t h e s e s p e c i f i c a t i o n s a p p l y o v e r v c n t l = 5 v , v in = 1.8 v , v o u t = 1 . 2 v , a n d t a = - 4 0 ~ 8 5 o c , u n l e s s o t h e r w i s e s p e c i f i e d . t y p i c a l v a l u e s a r e a t t j = 2 5 o c . 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 ( c o n t . ) apl59 2 0 symbol parameter test conditions min . typ . max . unit drop out voltage s (cont.) t j =25 o c - 0.25 0.30 v out =1.8v t j = - 40~125 o c - - 0.41 t j =25 o c - 0.24 0.29 v drop vin - to - vout dropout voltage v cntl =4.5v, i out =2a v out =1.2v t j = - 40~125 o c - - 0.39 v protection s t j =25 o c 3.0 3.6 4.3 i lim current - limit level t j = - 40 ~ 125 o c 2.5 - - a i short short current - limit level v fb <0.2v - 0.8 - a short current - limit blanking time from beginning of soft - start 0.6 1.6 - ms t sd thermal shutdown temperature t j rising - 170 - o c thermal shutdown hyster esis - 5 0 - o c enable and soft - start en logic high threshold voltage v en rising 0.5 0. 8 1.1 v en hysteresis - 80 - m v en pull - h igh current en=gnd - 5 - m a t ss soft - start interval 0.3 0. 6 1 ms power - ok and delay v th pok rising pok threshold volt age v fb rising 90 92 94 % pok threshold hysteresis - 8 - % pok pull - l ow voltage pok sinks 5ma - 0.2 5 0.4 v pok denounce interval v fb c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 4 - o c t . , 2 0 1 0 a p l 5 9 2 0 w w w . a n p e c . c o m . t w 6 t y p i c a l o p e r a t i n g c h a r a c t e r i s t i c s ( c o n t . ) junction temperature ( ) o c -50 -25 0 25 50 75 100 r e f e r e n c e v o l t a g e , v r e f ( v ) 0.792 0.794 0.796 0.798 0.800 0.802 0.804 0.806 0.808 125 reference voltage vs. junction temperature p o w e r s u p p l y r e j e c t i o n r a t i o ( d b ) frequency (hz) vcntl power supply rejection ratio (psrr) -80 -70 -60 -50 -40 -30 -20 -10 0 1000 10000 100000 1000000 v cntl =4.6~5.4v v in =1.5v v out =1.2v i out =2a c in =c out =10 m f p o w e r s u p p l y r e j e c t i o n r a t i o ( d b ) frequency (hz) vin power supply rejection ratio (psrr) -50 -40 -30 -20 -10 0 100 1000 10000 100000 100000 v cntl =5v v in =1.55v v in pk-pk =50mv v out =1.2v i out =2a c out =10 m f d r o p o u t v o l t a g e , v d r o p ( m v ) output current, i out (a) 0 50 100 150 200 250 300 350 400 450 0 0.5 1 1.5 2 v cntl = 5v v out = 2.5v t j = 25 x c t j = 0 x c t j = 75 x c t j = 125 x c t j = - 40x c dropout voltage vs. output current free datasheet http://www.datasheetlist.com/ c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 4 - o c t . , 2 0 1 0 a p l 5 9 2 0 w w w . a n p e c . c o m . t w 7 o p e r a t i n g w a v e f o r m s r e f e r t o t h e t y p i c a l a p p l i c a t i o n c i r c u i t . t h e t e s t c o n d i t i o n i s v i n = 1 . 5 v , v c n t l = 5 v , v o u t = 1 . 2 v , t a = 2 5 o c u n l e s s o t h e r w i s e s p e c i f i e d . power on v cntl v in v out v pok 1 4 2 3 ch1: v cntl , 5v/div, dc ch2: v in , 1v/div, dc time: 5m s/div c out =10 m f, c in =10 m f, r l =0.6 w ch3: v out , 1v/div, dc ch4: v pok , 5v/div, dc power off v cntl v in v out v pok 1 4 2 3 ch1: v cntl , 5v/div, dc ch2: v in , 1v/div, dc time: 10m s/div c out =10 m f, c in =10 m f, r l =0.6 w ch3: v out , 1v/div, dc ch4: v pok , 5v/div, dc over current protection i out 1 4 ch4: i out , 1a/div, dc time: 0.2 m s/div c out =10 m f, c in =10 m f, i out =1a to 3.4a v out ch1: v out , 1v/div, dc ch1: v out , 50mv/div, ac ch4: i out , 1a/div, dc time: 20 m s/div c out =10 m f, c in =10 m f load transient response i out v out 1 4 i out =10 m a to 2a to 10ma (rise / fall time = 1 m s) free datasheet http://www.datasheetlist.com/ c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 4 - o c t . , 2 0 1 0 a p l 5 9 2 0 w w w . a n p e c . c o m . t w 8 o p e r a t i n g w a v e f o r m s ( c o n t . ) r e f e r t o t h e t y p i c a l a p p l i c a t i o n c i r c u i t . t h e t e s t c o n d i t i o n i s v i n = 1 . 5 v , v c n t l = 5 v , v o u t = 1 . 2 v , t a = 2 5 o c u n l e s s o t h e r w i s e s p e c i f i e d . ch1: v en , 5v/div, dc ch2: v out , 1v/div, dc time: 5 m s/div c out =10 m f, c in =10 m f, r l =0.6 w shutdown i out v en 1 4 2 3 v out v pok ch3: v pok , 5v/div, dc ch4: i out , 2a/div, dc ch1: v en , 5v/div, dc ch2: v out , 1v/div, dc time: 0.5 ms/div c out =10 m f, c in =10 m f, r l =0.6 w enable 1 4 2 3 i out v en v out v pok ch3: v pok , 5v/div, dc ch4: i out , 2a/div, dc free datasheet http://www.datasheetlist.com/ c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 4 - o c t . , 2 0 1 0 a p l 5 9 2 0 w w w . a n p e c . c o m . t w 9 p i n d e s c r i p t i o n pin no. name function 1 pok power - ok signal output pin. this pin is an open - drain output used to indicate the status of output voltage by sensing fb voltage. this pin is pulled low when output voltage is not within the power - ok voltage window . 2 en a ct ive - high e nable control pin. applying and holding the voltage on this pin below the enable voltage threshold shuts down the output. when re - enabled, the ic undergoes a new soft - start process . when l eft this pin open, an internal pull - up current (5 m a typical) pulls the en voltage and enables the regulator. 3 vin main supply input pin for voltage conversions. a decoupling capacitor ( 3 10 m f recommended) is usually connected near this pin to filter the voltage noise and improve transient response. the voltage on this pin is monitored for power - on - reset purpose 4 vcntl bias voltage input pin for internal control circuitry. connect this pin to a voltage source ( +5v recommended). a decoupling capacitor (1 m f typical) is usually connected near this pin to f ilter the voltage noise . the voltage at this pin is monitored for power - on - reset purpose. 5 nc no connection. 6 vout output pin of the regulator. connect ing this pin to load and output capacitors (10 m f at least) is required for stability and improving t ransient response. the output voltage is programmed by the resistor - divider connected to fb pin . the vout can provide 2a (max.) load current to loads. d uring shutdown, the output voltage is quickly discharged by an internal pull - low mosfet. 7 fb voltage f eedback pin. connecting this pin to an external resistor divider receives the feedback voltage of the regulator. 8 gnd ground pin of the circuitry. all voltage levels are measured with respect to this pin. exposed pad - p - type substrate connection of the chip. connect this pad to system ground plane for good thermal conductivity. b l o c k d i a g r a m thermal shutdown gnd vout vin en vcntl pok 90% v ref fb delay 0.8v control logic and soft-start vcntl 5 m a enable por por error amplifier power-on- reset (por) p w o k current-limit and short current-limit s o f t - s t a r t e n a b l e v ref 0.8v i s e n free datasheet http://www.datasheetlist.com/ c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 4 - o c t . , 2 0 1 0 a p l 5 9 2 0 w w w . a n p e c . c o m . t w 1 0 t y p i c a l a p p l i c a t i o n c i r c u i t 10 m f: grm31mr60j106ke19 murata v cntl v out c cntl 1 m f v in +1.8v gnd vout vcntl pok vin c in 10 m f c out 10 m f en enable en pok r3 5.1k w 3 6 4 8 2 1 APL5920 r1 12k w c1 (optional) fb 7 r2 24k w (x5r/x7r recommended) (+5v is preferred) (x5r/x7r recommended) +1.2v / 2a free datasheet http://www.datasheetlist.com/ c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 4 - o c t . , 2 0 1 0 a p l 5 9 2 0 w w w . a n p e c . c o m . t w 1 1 f u n c t i o n d e s c r i p t i o n p o w e r - o n - r e s e t a p o w e r - o n - r e s e t ( p o r ) c i r c u i t m o n i t o r s b o t h o f s u p p l y v o l t a g e s o n v c n t l a n d v i n p i n s t o p r e v e n t w r o n g l o g i c c o n t r o l s . t h e p o r f u n c t i o n i n i t i a t e s a s o f t - s t a r t p r o c e s s a f t e r b o t h o f t h e s u p p l y v o l t a g e s e x c e e d t h e i r r i s i n g p o r v o l t a g e t h r e s h o l d s d u r i n g p o w e r i n g o n . t h e p o r f u n c - t i o n a l s o p u l l s l o w t h e p o k v o l t a g e r e g a r d l e s s o f t h e o u t p u t s t a t u s w h e n o n e o f t h e s u p p l y v o l t a g e s f a l l s b e l o w i t s f a l l i n g p o r v o l t a g e t h r e s h o l d . i n t e r n a l s o f t - s t a r t a n i n t e r n a l s o f t - s t a r t f u n c t i o n c o n t r o l s r i s e r a t e o f t h e o u t - p u t v o l t a g e t o l i m i t t h e c u r r e n t s u r g e d u r i n g s t a r t - u p . t h e t y p i c a l s o f t - s t a r t i n t e r v a l i s a b o u t 0 . 6 m s . o u t p u t v o l t a g e r e g u l a t i o n a n e r r o r a m p l i f i e r w o r k i n g w i t h a t e m p e r a t u r e - c o m p e n - s a t e d 0 . 8 v r e f e r e n c e a n d a n o u t p u t n m o s r e g u l a t e s o u t - p u t t o t h e p r e s e t v o l t a g e . t h e e r r o r a m p l i f i e r i s d e s i g n e d w i t h h i g h b a n d w i d t h a n d d c g a i n p r o v i d e s v e r y f a s t t r a n - s i e n t r e s p o n s e a n d l e s s l o a d r e g u l a t i o n . i t c o m p a r e s t h e r e f e r e n c e w i t h t h e f e e d b a c k v o l t a g e a n d a m p l i f i e s t h e d i f - f e r e n c e t o d r i v e t h e o u t p u t n m o s w h i c h p r o v i d e s l o a d c u r r e n t f r o m v i n t o v o u t . c u r r e n t - l i m i t p r o t e c t i o n t h e a p l 5 9 2 0 m o n i t o r s t h e c u r r e n t f l o w i n g t h r o u g h t h e o u t p u t n m o s a n d l i m i t s t h e m a x i m u m c u r r e n t t o p r e v e n t l o a d a n d a p l 5 9 2 0 f r o m d a m a g e s d u r i n g c u r r e n t o v e r - l o a d c o n d i t i o n s . s h o r t c u r r e n t - l i m i t p r o t e c t i o n t h e s h o r t c u r r e n t - l i m i t f u n c t i o n r e d u c e s t h e c u r r e n t - l i m i t l e v e l d o w n t o 0 . 8 a ( t y p i c a l ) w h e n t h e v o l t a g e o n f b p i n f a l l s b e l o w 0 . 2 v ( t y p i c a l ) d u r i n g c u r r e n t o v e r l o a d o r s h o r t - c i r c u i t c o n d i t i o n s . t h e s h o r t c u r r e n t - l i m i t f u n c t i o n i s d i s a b l e d f o r s u c c e s s - f u l s t a r t - u p d u r i n g s o f t - s t a r t . t h e r m a l s h u t d o w n a t h e r m a l s h u t d o w n c i r c u i t l i m i t s t h e j u n c t i o n t e m p e r a - t u r e o f a p l 5 9 2 0 . w h e n t h e j u n c t i o n t e m p e r a t u r e e x c e e d s + 1 7 0 o c , a t h e r m a l s e n s o r t u r n s o f f t h e o u t p u t n m o s , a l - l o w i n g t h e d e v i c e t o c o o l d o w n . t h e r e g u l a t o r r e g u l a t e s t h e o u t p u t a g a i n t h r o u g h i n i t i a t i o n o f a n e w s o f t - s t a r t p r o - c e s s a f t e r t h e j u n c t i o n t e m p e r a t u r e c o o l s b y 5 0 o c , r e s u l t - i n g i n a p u l s e d o u t p u t d u r i n g c o n t i n u o u s t h e r m a l o v e r - l o a d c o n d i t i o n s . t h e t h e r m a l s h u t d o w n i s d e s i g n e d w i t h a 5 0 o c h y s t e r e s i s t o l o w e r t h e a v e r a g e j u n c t i o n t e m p e r a - t u r e d u r i n g c o n t i n u o u s t h e r m a l o v e r l o a d c o n d i t i o n s , e x - t e n d i n g l i f e t i m e o f t h e d e v i c e . f o r n o r m a l o p e r a t i o n , t h e d e v i c e p o w e r d i s s i p a t i o n s h o u l d b e e x t e r n a l l y l i m i t e d s o t h a t j u n c t i o n t e m p e r a t u r e s w i l l n o t e x c e e d + 1 2 5 o c . e n a b l e c o n t r o l t h e a p l 5 9 2 0 h a s a d e d i c a t e d e n a b l e p i n ( e n ) . a l o g i c l o w s i g n a l a p p l i e d t o t h i s p i n s h u t s d o w n t h e o u t p u t . f o l - l o w i n g a s h u t d o w n , a l o g i c h i g h s i g n a l r e - e n a b l e s t h e o u t p u t t h r o u g h i n i t i a t i o n o f a n e w s o f t - s t a r t c y c l e . w h e n l e f t o p e n , t h i s p i n i s p u l l e d u p b y a n i n t e r n a l c u r r e n t s o u r c e ( 5 m a t y p i c a l ) t o e n a b l e n o r m a l o p e r a t i o n . i t ? s n o t n e c e s - s a r y t o u s e a n e x t e r n a l t r a n s i s t o r t o s a v e c o s t . p o w e r - o k a n d d e l a y t h e a p l 5 9 2 0 i n d i c a t e s t h e s t a t u s o f t h e o u t p u t v o l t a g e b y m o n i t o r i n g t h e f e e d b a c k v o l t a g e ( v f b ) o n f b p i n . a s t h e v f b r i s e s a n d r e a c h e s t h e r i s i n g p o w e r - o k v o l t a g e t h r e s h - o l d ( v t h p o k ) , a n i n t e r n a l d e l a y f u n c t i o n s t a r t s t o w o r k . a t t h e e n d o f t h e d e l a y t i m e , t h e i c t u r n s o f f t h e i n t e r n a l n m o s o f t h e p o k t o i n d i c a t e t h e o u t p u t i s o k . a s t h e v f b f a l l s a n d r e a c h e s t h e f a l l i n g p o w e r - o k v o l t a g e t h r e s h o l d , t h e i c t u r n s o n t h e n m o s o f t h e p o k ( a f t e r a d e b o u n c e t i m e o f 1 0 m s t y p i c a l ) . free datasheet http://www.datasheetlist.com/ c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 4 - o c t . , 2 0 1 0 a p l 5 9 2 0 w w w . a n p e c . c o m . t w 1 2 a p p l i c a t i o n i n f o r m a t i o n . . . . . . . . . . . ( v ) p o w e r s e q u e n c i n g t h e p o w e r s e q u e n c i n g o f v i n a n d v c n t l i s n o t n e c e s - s a r y t o b e c o n c e r n e d . h o w e v e r , d o n o t a p p l y a v o l t a g e t o v o u t f o r a l o n g t i m e w h e n t h e m a i n v o l t a g e a p p l i e d a t v i n i s n o t p r e s e n t . t h e r e a s o n i s t h e i n t e r n a l p a r a s i t i c d i o d e f r o m v o u t t o v i n c o n d u c t s a n d d i s s i p a t e s p o w e r w i t h o u t p r o t e c t i o n s d u e t o t h e f o r w a r d - v o l t a g e . o u t p u t c a p a c i t o r t h e a p l 5 9 2 0 r e q u i r e s a p r o p e r o u t p u t c a p a c i t o r t o m a i n - t a i n s t a b i l i t y a n d i m p r o v e t r a n s i e n t r e s p o n s e . t h e o u t p u t c a p a c i t o r s e l e c t i o n i s d e p e n d e n t u p o n e s r ( e q u i v a l e n t s e r i e s r e s i s t a n c e ) a n d c a p a c i t a n c e o f t h e o u t p u t c a p a c i t o r o v e r t h e o p e r a t i n g t e m p e r a t u r e . u l t r a - l o w - e s r c a p a c i t o r s ( s u c h a s c e r a m i c c h i p c a p a c i t o r s ) a n d l o w - e s r b u l k c a p a c i t o r s ( s u c h a s s o l i d t a n t a l u m , p o s c a p , a n d a l u m i n u m e l e c t r o l y t i c c a p a c i t o r s ) c a n a l l b e u s e d a s o u t p u t c a p a c i t o r s . d u r i n g l o a d t r a n s i e n t s , t h e o u t p u t c a p a c i t o r s w h i c h i s d e - p e n d i n g o n t h e s t e p p i n g a m p l i t u d e a n d s l e w r a t e o f l o a d c u r r e n t , a r e u s e d t o r e d u c e t h e s l e w r a t e o f t h e c u r r e n t s e e n b y t h e a p l 5 9 2 0 a n d h e l p t h e d e v i c e t o m i n i m i z e t h e v a r i a t i o n s o f o u t p u t v o l t a g e f o r g o o d t r a n s i e n t r e s p o n s e . f o r t h e a p p l i c a t i o n s w i t h l a r g e s t e p p i n g l o a d c u r r e n t , t h e l o w - e s r b u l k c a p a c i t o r s a r e n o r m a l l y r e c o m m e n d e d . d e c o u p l i n g c e r a m i c c a p a c i t o r s m u s t b e p l a c e d a t t h e l o a d a n d g r o u n d p i n s a s c l o s e a s p o s s i b l e a n d t h e i m p e d - a n c e o f t h e l a y o u t m u s t b e m i n i m i z e d . i n p u t c a p a c i t o r t h e a p l 5 9 2 0 r e q u i r e s p r o p e r i n p u t c a p a c i t o r s t o s u p p l y c u r r e n t s u r g e d u r i n g s t e p p i n g l o a d t r a n s i e n t s t o p r e v e n t t h e i n p u t v o l t a g e r a i l f r o m d r o p p i n g . b e c a u s e t h e p a r a - s i t i c i n d u c t o r f r o m t h e v o l t a g e s o u r c e s o r o t h e r b u l k c a - p a c i t o r s t o t h e v i n p i n l i m i t t h e s l e w r a t e o f t h e s u r g e c u r r e n t s , m o r e p a r a s i t i c i n d u c t a n c e n e e d s m o r e i n p u t c a p a c i t a n c e . u l t r a - l o w - e s r c a p a c i t o r s ( s u c h a s c e r a m i c c h i p c a p a c i t o r s ) a n d l o w - e s r b u l k c a p a c i t o r s ( s u c h a s s o l i d t a n t a l u m , p o s c a p , a n d a l u m i n u m e l e c t r o l y t i c c a p a c i t o r s c a n a l l b e u s e d a s a n i n p u t c a p a c i t o r o f v i n . f o r m o s t a p p l i c a t i o n s , t h e r e c o m m e n d e d i n p u t c a p a c i t a n c e o f v i n i s 1 0 m f a t l e a s t . h o w e v e r , i f t h e d r o p o f t h e i n p u t v o l t a g e s e t t i n g t h e o u t p u t v o l t a g e t h e o u t p u t v o l t a g e i s p r o g r a m m e d b y t h e r e s i s t o r d i v i d e r c o n n e c t e d t o f b p i n . the preset output voltage i s c a l c u - l a t e d b y t h e f o l l o w i n g e q u a t i o n : ? ? ? ? ? + = r2 r1 1 0.8 v out w h e r e r 1 i s t h e r i s i s t o r c o n n e c t e d f r o m v o u t t o f b w i t h k e l v i n s e n s i n g c o n n e c t i o n a n d r 2 i s t h e r i s i s t o r c o n - n e c t e d f r o m f b t o g n d . a b y p a s s c a p a c i t o r ( c 1 ) m a y b e c o n n e c t e d w i t h r 1 i n p a r a l l e l t o i m p r o v e l o a d t r a n s i e n t r e s p o n s e a n d s t a b i l i t y . i s n o t c a r e d , t h e i n p u t c a p a c i t a n c e c a n b e l e s s t h a n 1 0 m f . m o r e c a p a c i t a n c e r e d u c e s t h e v a r i a t i o n s o f t h e s u p p l y v o l t a g e o n v i n p i n . layout consideration (see figure 1) 1. please solder the exposed pad on the system ground pad on the top-layer of pcbs. the ground pad must have wide size to conduct heat into the ambient air through the system ground plane and pcb as a heat sink. 2. please place the input capacitors for vin and vcntl pins near the pins as close as possible for decoupling high-frequency ripples. 3. ceramic decoupling capacitors for load must be placed near the load as close as possible for decoupling high- frequency ripples. 4. to place APL5920 and output capacitors near the load reduces parasitic resistance and inductance for excel- lent load transient response. 5. the negative pins of the input and output capacitors and the gnd pin must be connected to the ground plane of the load. 6. large current paths, shown by bold lines on the figure 1, must have wide tracks. 7. place the r1, r2, and c1 (option) near the APL5920 as close as to avoid noise coupling. 8. connect the ground of the r2 to the gnd pin by using a dedicated track. 9. connect the one pin of the r1 to the load for kelvin sensing. 10. connect one pin of the c1 (option) to the vout pin for reliable feedback compensation. free datasheet http://www.datasheetlist.com/ c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 4 - o c t . , 2 0 1 0 a p l 5 9 2 0 w w w . a n p e c . c o m . t w 1 3 f i g u r e 2 . f i g u r e 1 . t h e r m a l c o n s i d e r a t i o n r e f e r t o t h e f i g u r e 2 , t h e s o p - 8 p i s a c o s t - e f f e c t i v e p a c k - a g e f e a t u r i n g a s m a l l s i z e l i k e a s t a n d a r d s o p - 8 a n d a b o t t o m e x p o s e d p a d t o m i n i m i z e t h e t h e r m a l r e s i s t a n c e o f t h e p a c k a g e , b e i n g a p p l i c a b l e t o h i g h c u r r e n t a p p l i c a t i o n s . t h e e x p o s e d p a d m u s t b e s o l d e r e d t o t h e t o p - l a y e r g r o u n d p l a n e . i t i s r e c o m m e n d e d t o c o n n e c t t h e t o p - l a y e r g r o u n d p a d t o t h e i n t e r n a l g r o u n d p l a n b y u s i n g v i a s . t h e c o p p e r o f t h e g r o u n d p l a n e o n t h e t o p - l a y e r c o n - d u c t s h e a t i n t o t h e p c b a n d a m b i e n t a i r . p l e a s e e n l a r g e t h e a r e a o f t h e t o p - l a y e r p a d a n d t h e g r o u n d p l a n e t o r e d u c e t h e c a s e - t o - a m b i e n t r e s i s t a n c e ( q c a ) . exposed pad die top ground plane pcb ambient air sop-8p 5 6 7 8 1 2 3 4 internal ground plane v cntl v out c cntl v in gnd vout vcntl vin c in c out APL5920 r1 c1 (optional) fb r2 load recommanded minimum footprint 0 . 2 1 2 0 . 0 7 2 0.050 0.024 1 2 3 4 8 7 6 5 0 . 1 1 8 0.138 unit : inch a p p l i c a t i o n i n f o r m a t i o n ( c o n t . ) layout consideration (see figure 1) (cont.) free datasheet http://www.datasheetlist.com/ c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 4 - o c t . , 2 0 1 0 a p l 5 9 2 0 w w w . a n p e c . c o m . t w 1 4 p a c k a g e i n f o r m a t i o n s o p - 8 p thermal pad d d1 e 2 e 1 e e b a 2 a a 1 view a l 0 . 2 5 gauge plane seating plane q note : 1. followed from jedec ms-012 ba. 2. dimension "d" does not include mold flash, protrusions or gate burrs. mold flash, protrusion or gate burrs shall not exceed 6 mil per side . 3. dimension "e" does not include inter-lead flash or protrusions. inter-lead flash and protrusions shall not exceed 10 mil per side. 0.020 0.010 0.020 0.050 0.006 0.063 max. 0.40 l q 0 o c e e h e1 0.25 d c b 0.17 0.31 0.016 1.27 8 o c 0 o c 8 o c 0.50 1.27 bsc 0.51 0.25 0.050 bsc 0.010 0.012 0.007 millimeters min. s y m b o l a1 a2 a 0.00 1.25 sop-8p max. 0.15 1.60 min. 0.000 0.049 inches d1 2.50 0.098 2.00 0.079 e2 3.50 3.00 0.138 0.118 4.80 5.00 0.189 0.197 3.80 4.00 0.150 0.157 5.80 6.20 0.228 0.244 h x 4 5 o c see view a -t- seating plane < 4 mils free datasheet http://www.datasheetlist.com/ c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 4 - o c t . , 2 0 1 0 a p l 5 9 2 0 w w w . a n p e c . c o m . t w 1 5 a e 1 a b w f t p0 od0 b a0 p2 k0 b 0 section b-b section a-a od1 p1 h t1 a d c a r r i e r t a p e & r e e l d i m e n s i o n s package type unit quantity sop - 8p tape & reel 2500 application a h t1 c d d w e1 f 330.0 ? 2.00 50 min. 12.4+2.00 - 0.00 13.0+0.50 - 0.20 1.5 min. 20.2 min. 12.0 ? 0.30 1.75 ? 0.10 5.5 ? 0.05 p 0 p1 p 2 d 0 d1 t a 0 b 0 k 0 sop - 8p 4.0 ? 0.10 8.0 ? 0.10 2.0 ? 0.05 1.5+0.10 - 0.00 1.5 min. 0.6+0.00 - 0.4 0 6.40 ? 0.20 5.20 ? 0.20 2.10 ? 0.20 (mm) d e v i c e s p e r u n i t free datasheet http://www.datasheetlist.com/ c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 4 - o c t . , 2 0 1 0 a p l 5 9 2 0 w w w . a n p e c . c o m . t w 1 6 t a p i n g d i r e c t i o n i n f o r m a t i o n user direction of feed s o p - 8 p c l a s s i f i c a t i o n p r o f i l e free datasheet http://www.datasheetlist.com/ c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 4 - o c t . , 2 0 1 0 a p l 5 9 2 0 w w w . a n p e c . c o m . t w 1 7 profile feature sn - pb eutectic assembly pb - free assembly preheat & soak temperature min (t smin ) temperature max (t smax ) time (t smin to t smax ) ( t s ) 100 c 150 c 60 - 120 seconds 150 c 200 c 60 - 1 2 0 seconds average ramp - up rate (t smax to t p ) 3 c/second ma x. 3 c/second max. liquidous temperature ( t l ) time at l iquidous (t l ) 183 c 60 - 150 seconds 217 c 60 - 150 seconds peak package body temperature (t p ) * see classification temp in table 1 see classification temp in table 2 time (t p ) ** within 5 c of the spec ified c lassification t emperature ( t c ) 2 0 ** seconds 3 0 ** seconds average r amp - down rate (t p to t smax ) 6 c/second max. 6 c/second max. time 25 c to p eak t emperature 6 minutes max. 8 minutes max. * tolerance for peak profile temperature (t p ) is defined a s a supplier minimum and a user maximum. ** tolerance for time at peak profile temperature (t p ) is defined as a supplier minimum and a user maximum. c l a s s i f i c a t i o n r e f l o w p r o f i l e s table 2. pb - free process ? classification temperatures (tc) package thickness volume mm 3 <350 volume mm 3 350 - 2000 volume mm 3 >2000 <1.6 mm 260 c 260 c 260 c 1.6 mm ? 2.5 mm 260 c 250 c 245 c 3 2.5 mm 250 c 245 c 245 c table 1. snpb eutectic process ? classification temperatures (tc) package thickness volume mm 3 <350 volume mm 3 3 350 <2.5 mm 235 c 22 0 c 3 2.5 mm 220 c 220 c r e l i a b i l i t y t e s t p r o g r a m test item method description solderability jesd - 22, b102 5 sec, 245 c holt jesd - 22, a108 1000 hrs, bias @ t j =125 c pct jesd - 22, a102 168 hrs, 100 % rh, 2atm , 121 c tct jesd - 22, a104 500 cycles, - 65 c~150 c hbm mil - std - 883 - 3015.7 vhbm ? 2kv mm jesd - 22, a1 15 vmm ? 200v latch - up jesd 78 10ms, 1 tr ? 100ma free datasheet http://www.datasheetlist.com/ c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 4 - o c t . , 2 0 1 0 a p l 5 9 2 0 w w w . a n p e c . c o m . t w 1 8 c u s t o m e r s e r v i c e a n p e c e l e c t r o n i c s c o r p . head office : no.6, dusing 1st road, sbip, hsin-chu, taiwan, r.o.c. tel : 886-3-5642000 fax : 886-3-5642050 t a i p e i b r a n c h : 2 f , n o . 1 1 , l a n e 2 1 8 , s e c 2 j h o n g s i n g r d . , s i n d i a n c i t y , t a i p e i c o u n t y 2 3 1 4 6 , t a i w a n t e l : 8 8 6 - 2 - 2 9 1 0 - 3 8 3 8 f a x : 8 8 6 - 2 - 2 9 1 7 - 3 8 3 8 free datasheet http://www.datasheetlist.com/ |
Price & Availability of APL5920
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