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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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 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 . p o w e r - d i s t r i b u t i o n s w i t c h e s w i t h s o f t s t a r t 90m w high side mosfet 2a continuous current soft-start time programmable by external capacitor wide supply voltage range: 2.7v to 5.5v current-limit and short-circuit protections under-voltage lockout protection reverse current blocking when switch disabled over-temperature protection logic level enable input apl3512a: active high apl3512b: active low lead free and green devices available (rohs compliant) f e a t u r e s g e n e r a l d e s c r i p t i o n a p p l i c a t i o n s tft lcd modules notebook and desktop computers usb ports high-side power protection switches 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 the apl3512a/b is a power-distribution switch with some protection functions that can deliver current up to 2a. the device incorporates a 90m w n-channel mosfet power switch that is controlled by an enable logic pin and has a ss pin dedicated to soft-start ramp-up rate control that can be used in application where the inrush current is concerned. the device integrates some protection features, includ- ing current-limit protection, short-circuit protection, over- temperature protection, and uvlo. the current-limit and short-circuit protection can protect down-stream devices from catastrophic failure by limiting the output current at current-limit threshold during over-load or short-circuit events. when v out drops below v in -1.5v the devices limit the current to a lower and safe level. the over-tempera- ture protection function shuts down the n-channel mosfet power switch when the junction temperature rises beyond 140 o c and will automatically turns on the power switch when the temperature drops by 20 o c. the uvlo function keeps the power switch in off state until there is a valid input voltage present. the device is available in lead free sot-23-5, tdfn2x2- 6 and sop-8 packages with enable active-high(en) and active-low(enb) versions. vin vout gnd apl3512a/b ss en/ enb v in v out en control
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 2 p i n c o n f i g u r a t i o n gnd 2 5 vin enb 3 4 ss vout 1 sot-23-5 apl3512b gnd 2 5 vin en 3 4 ss vout 1 sot-23-5 apl3512a ss 2 7 nc gnd 3 nc 4 6 enb 5 nc 8 vout vin 1 sop-8 apl3512b ss 2 7 nc gnd 3 nc 4 6 en 5 nc 8 vout vin 1 sop-8 apl3512a gnd 3 6 vout vin 1 ss 2 5 nc 4 en tdfn 2 x 2 - 6 apl 3512 a gnd 3 6 vout vin 1 ss 2 5 nc 4 enb tdfn 2 x 2 - 6 apl 3512 b exposed pad , connect to large ground plane for heat dissipation 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 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 ) . apl 3512 package code b : sot - 23 - 5 k : sop - 8 qb : tdfn 2 x 2 - 6 operating ambient temperature range i : - 40 to 85 o c handling code tr : tape & reel en function a : active high b : active low assembly material g : halogen and lead free device handling code temperature range package code assembly material apl 3512 a b : l 2 ax x - date code apl 3512 b b : l 2 bx x - date code en function apl 3512 a k : apl 3512 a xxxxx xxxxx - date code apl 3512 b k : xxxxx - date code apl 3512 b xxxxx apl 3512 a qb : x - date code l 12 a x apl 3512 b qb : x - date code l 12 b x
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 3 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 ) symbol parameter rating unit v in vi n to gnd voltage - 0.3 ~ 6 v v out vout to gnd voltage - 0.3 ~ 6 v v enb , v en en, enb to gnd voltage - 0.3 ~ 6 v v ss ss to gnd voltage - 0.3 ~ 6 v i out continuous o utput c urrent internally limited a t j maximum junction te mperature - 40 ~ 150 o c t stg storage temperature - 65 ~ 150 o c t sdr maximum lead soldering temperature , 10 seconds 26 0 o c note1: stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. these are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recom- mended operating conditions" is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. 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 free air (note 2) sot - 23 - 5 sop - 8 tdfn2x2 - 6 250 160 225 o c/w note 2: q ja is measured with the component mounted on a high effective thermal conductivity test board in free air. symbol parameter range unit v in vin input voltage 2.7 ~ 5.5 v i out out output current 0 ~ 2 a c ss ss pin soft - start capacitor (note 4) 0.3 ~ 470 nf t a ambient temperature - 40 ~ 85 o c t j junction temperature - 40 ~ 125 o c 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 ( n o t e 3 ) note 3: refer to the typical application circuit. note 4: attaching a capacitor on ss pin can adjust the v out soft-start rate. if the c ss is out of the recommended range, the soft-start rate could become internally controlled as if no c ss .
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 4 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 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 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 i n = 5 v , v e n = 5 v o r v e n b = 0 v a n d t a = - 4 0 ~ 8 5 o c . t y p i c a l v a l u e s a r e a t t a = 2 5 o c . apl3512a/b symbol parameter test conditions min. typ. max. unit supply current no load, v en =0v or v enb =5v - - 1 m a vin supply current no load, v en =5v or v enb =0v - 60 100 m a leakage current vout=gnd, v en =0v or v enb =5v - - 1 m a reverse leakag e current vin=gnd, v out =5v, v en =0v or v enb =5v - - 1 m a power switch i out =1.5a, t a = 2 5 o c - 90 110 m w r ds(on) power switch on resistance i out =1.5a, t a = - 40~85 o c - 90 140 m w under - voltage lockout vin uvlo threshold voltage v in rising, t a = - 40~85 o c 2.3 - 2.65 v vin uvlo hysteresis - 0.2 - v current - limit and short - circuit protections i lim current - limit threshold v in = 2.7 v to 5.5v, t a = - 40~85 o c 2.5 3.1 4.22 a i short short - circuit output current v in = 2.7 v to 5.5v - 0.8 - a soft - start control pin ss c urrent v in =5v, t a = - 40~85 o c 1 2 3 m a v in =5v, no load, c out = 1 m f, c ss =10nf, t a = - 40~85 o c - 10 - ms v in =3.3v, no load, c out = 1 m f, c ss =10nf, t a = - 40~85 o c - 6.6 - ms t ss soft - start time v in =3.3v, no load, c out = 1 m f, no c ss or ss tied to v in , t a = - 40~85 o c 1 2 3 ms en or enb input pin v ih input logic high v in = 2.7 v to 5v 2 - - v v il inpu t logic low v in = 2.7 v to 5v - - 0.8 v input current - - 1 m a vout discharge resistance v en =0v or v enb =5v - 150 - w over - temperature protection (otp) t otp over - temperature threshold t j rising - 140 - c over - temperature hysteresis - 20 - c
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 5 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 supply current vs. junction temperature s u p p l y c u r r e n t , i c c ( m a ) -50 0 50 100 150 junction temperature ( o c) v in =5v, r load = open, c in =c out =33 m f/ electrolytic ic enabled ic disabled 0 20 40 60 80 100 switch on resistance vs. input voltage s w i t c h o n r e s i s t a n c e , r d s ( o n ) ( m w ) input voltage (v) i out =1.5a , c in =1 m f/x7r, c out =1 m f/x7r, t a =25 o c 2.5 3.0 3.5 4.0 4.5 5.0 5.5 60 80 90 100 110 120 130 70 50 s w i t c h o n r e s i s t a n c e , r d s ( o n ) ( m w ) switch on resistance vs. junction temperature v in =3.3v junction temperature ( o c) v in =5v i out =1.5a, c in =1 m f/x7r, c out =10 m f/x7r 40 60 80 100 120 140 160 20 0 -50 0 50 100 150 supply current vs. input voltage input voltage (v) 2.5 3.0 3.5 4.0 4.5 5.0 5.5 s u p p l y c u r r e n t , i c c ( m a ) 00 10 20 30 40 50 60 70 80 r load = open, c in =c out =1 m f/x7r , t a =25 o c ic disabled ic enabled current-limit threshold vs. junction temperature c u r r e n t - l i m i t t h r e s h o l d , i l i m ( a ) -50 0 50 100 150 junction temperature ( o c) 2.0 2.8 3.0 3.2 3.4 3.6 3.8 v in =5v 2.6 2.4 2.2 input voltage (v) c u r r e n t - l i m i t t h r e s h o l d , i l i m ( a ) current-limit threshold vs. input voltage t a =25 o c 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 2.5 3.0 3.5 4.0 4.5 5.0 5.5
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 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 . ) en pin threshold voltage vs. junction temperature e n p i n t h r e s h o l d v o l t a g e , v e n ( v ) en falling en rising junction temperature ( o c) v in =5v, r load =50 w , c in = c out =33 m f/elctrolytic -50 0 50 100 150 0.5 1.0 1.5 2.0 2.5 3.0 turn-on rising time vs. junction temperature t u r n - o n r i s i n g t i m e , t f ( m s ) junction temperature ( o c) v in = 5v, r load =30 w , c in = 1 m f/x7r, c out =33 m f/electrolytic 1.0 1.5 2.0 0.5 0.0 -50 0 50 100 150 en pin threshold voltage vs. input voltage input voltage (v) e n p i n t h r e s h o l d v o l t a g e , v e n ( v ) en falling en rising r load =50 w , c in = c out =33 m f/ elctrolytic, t a =25 o c 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 0.8 0.9 1.0 1.1 1.2 2.5 3.0 3.5 4.0 4.5 5.0 5.5 v in uvlo threshold voltage vs. junction temperature v i n u v l o t h r e s h o l d v o l t a g e , v v l o c ( v ) junction temperature ( o c) i out =15ma, c in = 1 m f/x7r, c out =33 m f/electrolytic 1.2 1.6 2.0 2.4 2.8 3.2 0.8 -50 0 50 100 150 uvlo rising uvlo falling short-circuit output current vs. input voltage input voltage (v) 2.5 3.0 3.5 4.0 4.5 5.0 5.5 s h o r t - c i r c u i t o u t p u t c u r r e n t , i s h o r t ( a ) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 t a =25 o c current-limit response vs. output peak current c u r r e n t - l i m i t r e s p o n s e ( m s ) 0 50 100 150 200 250 output peak current (a) v in =5v, t a =25 o c 0 2 4 6 8 10 12
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 7 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 . ) o u t p u t v o l t a g e , v o u t ( v ) output current (a) output voltage vs. output current v in =5v t a =25 o c 0.0 2.5 3.0 3.5 4.0 4.5 5.0 2.0 1.5 1.0 0.5 0 1 2 3 4 v in =3.3v turn off leakage current vs. junction temperature t u r n o f f l e a k a g e c u r r e n t , i l e a k ( m a ) junction temperature ( o c) v in = 5v, r load = 0 w , c in = c out =1 m f/x7r 0 2 4 6 8 10 -50 0 50 100 150 ss current vs. junction temperature s s c u r r e n t , i s s ( m a ) junction temperature ( o c) v in =5v 0.4 1.2 2.0 2.4 2.8 3.2 1.6 0.8 -50 0 50 100 150
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 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 t h e t e s t c o n d i t i o n i s v i n = 5 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 . p o w e r o n p o w e r o f f 1 2 v in v out 3 i out t u r n o n r e s p o n s e t u r n o f f r e s p o n s e v in 1 2 v out 3 i out v out v en 1 2 3 i out 1 v out v in i out 2 3 time:5m s/div v in =5v, r load =30 w , c in =1 m f/mlcc, c out =100 m f/electrolytic, ss open ch1: v in , 2v/div, dc ch2: v out , 2v/div, dc ch3: i out , 0.5a/div, dc time:20m s/div v in =5v, r load =30 w , c in =1 m f/mlcc, c out =100 m f/electrolytic, ss open ch1: v in , 2v/div, dc ch2: v out , 2v/div, dc ch3: i out , 0.5a/div, dc time:0.5m s/div v in =5v, r load =30 w , c in =1 m f/mlcc, c out =100 m f/electrolytic, ss open ch1: v en , 5v/div, dc ch2: v out , 2v/div, dc ch3: i out , 0.5a/div, dc time:1m s/div v in =5v, r load =30 w , c in =1 m f/mlcc, c out =100 m f/electrolytic, ss open ch1: v en , 5v/div, dc ch2: v out , 2v/div, dc ch3: i out , 0.5a/div, dc
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 9 o p e r a t i n g w a v e f o r m s ( c o n t . ) t h e t e s t c o n d i t i o n i s v i n = 5 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 . s o f t s t a r t r a m p - u p c o n t r o l c u r r e n t l i m i t r e s p o n s e ch1: v en , 5v/div, dc ch2: v out , 2v/div, dc time: 0.5 m s/div v in =5v , r load =30 w , c in =1 m f/mlcc, c out =33 m f/electrolytic s h o r t c i r c u i t p r o t e c t i o n ch1: v in , 2v/div, dc time: 100 m s/div v in =5v, vout short to ground, c in =1 m f/mlcc, c out =33 m f/electrolytic ch2: v out , 2v/div, dc ch3: i out , 20a/div, dc v en 1 2 v out c ss =330pf c ss =560pf c ss =unconnected or ss tied to v in c ss =2.2nf c ss =3.3nf c ss =4.4nf c ss =5.6nf c ss =820pf 1 2 3 v in v out i out 1 2 3 v in v out i out ch1: v i n , 2v/div, dc ch2: v out , 2v/div, dc time: 2 m s/div v in =5v, c in =1 m f/mlcc, c out =33 m f/electrolytic ch3: i out , 1a/div, dc
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 1 0 p i n d e s c r i p t i o n pin no. sot - 23 - 5 sop - 8 tdfn2x2 - 6 name function 1 8 6 vout output voltage pin. the output voltage follows the input voltage. when enb is high or en is low the output voltage is discharged by an internal resistor . 2 3 3 gnd ground en (apl3512a) enable input. pull this pin to high to enable the device and pull this pin to low to disable device. the en pin cannot be left floating. 3 6 4 enb (apl3512b) enable input. pull this pin to high to disable the device and pull this pin to low to enable device . the enb pin cannot be left floating. 4 2 2 ss soft - start control pin. connect a capacitor to gnd to control the soft - tart rate. if the ss pin is left floating or tied to v in the soft - tart time is 2ms when v in =5v. 5 1 1 vin power supply input. c onnect this pin to external dc supply. - 4, 5, 7 5 nc internally not connected. b l o c k d i a g r a m gate driver and control logic uvlo vin vout charge pump ss en/ enb otp gnd current -limit soft-start
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 1 1 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 vin vout gnd apl3512a/b ss en/enb controller 1 m f 10 m f 10nf v in v out 0.1 m f c out c in c ss c by
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 1 2 f u n c t i o n d e s c r i p t i o n vin under-voltage lockout (uvlo) the apl3512a/b power switch is built-in an under-volt- age lockout circuit to keep the output shut off until internal circuitry is operating properly. the uvlo circuit has hys- teresis and a de-glitch feature so that it will typically ig- nore undershoot transients on the input. when input volt- age exceeds the uvlo threshold, the output voltage starts a soft-start to reduce the inrush current. power switch the power switch is an n-channel mosfet with a low r ds(on) . the internal power mosfet does not have the body diode. when ic is off, the mosfet prevents a cur- rent flowing from the vout back to vin and vin to vout. current-limit protection the apl3512a/b power switch provides the current-limit protection function. during current-limit, the devices limit output current at current-limit threshold. for reliable operation, the device should not be operated in current- limit for extended period. short-circuit protection w h e n t h e o u t p u t v o l t a g e d r o p s b e l o w v i n - 1 . 5 v , w h i c h i s c a u s e d b y t h e o v e r l o a d o r s h o r t - c i r c u i t , t h e d e v i c e s l i m i t t h e o u t p u t c u r r e n t d o w n t o a s a f e l e v e l . t h e s h o r t c i r c u i t c u r r e n t - l i m i t i s u s e d t o r e d u c e t h e p o w e r d i s s i p a t i o n d u r - i n g s h o r t - c i r c u i t c o n d i t i o n . i f t h e j u n c t i o n t e m p e r a t u r e i s o v e r t h e 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 d e v i c e w i l l e n t e r t h e t h e r m a l s h u t d o w n . soft-start the apla3512a/b provides an adjustable soft-start cir- cuitry to control rise rate of the output voltage and limit the current surge during start-up. the soft-start ramp-up rate is controlled by a capacitor from ss pin to the ground. under a specific v in being applied to the apl3512a/b, the soft start time can be calculated by the following equation: t ss = 0.2 x c ss x v in where, t ss is soft-start time of v out rising from 0 to 100%, of which unit is second. c ss is the value of the capacitor connected from ss pin to gnd, of which unit is micro-farad. v in is the amplitude of input voltage applied to this device, of which unit is volt. if the c ss is not connected or ss pin is tied to v in , the soft- start time is 2ms when v in =5v. enable/disable p u l l t h e e n b a b o v e 2 v , o r e n b e l o w 0 . 8 v t o d i s a b l e t h e d e v i c e a n d p u l l e n b p i n b e l o w 0 . 8 v o r e n a b o v e 2 v t o e n a b l e t h e d e v i c e . w h e n t h e i c i s d i s a b l e d , t h e s u p p l y c u r r e n t i s r e d u c e d t o l e s s t h a n 1 m a . t h e e n a b l e i n p u t i s c o m p a t i b l e w i t h b o t h t t l a n d c m o s l o g i c l e v e l s . t h e e n / e n b p i n s c a n n o t b e l e f t f l o a t i n g . over-temperature protection when the junction temperature exceeds 140 o c, the inter- nal thermal sense circuit turns off the power fet and allows the device to cool down. when the device?s junc- tion temperature cools by 20 o c, the internal thermal sense circuit will enable the device, resulting in a pulsed output during continuous thermal protection. thermal protection is designed to protect the ic in the event of over-temperature conditions. for normal operation, the junction temperature cannot exceed t j =+125 o c.
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 1 3 a p p l i c a t i o n i n f o r m a t i o n i n p u t c a p a c i t o r a 1 m f c e r a m i c b y p a s s c a p a c i t o r f r o m v i n t o g n d , l o c a t e d n e a r t h e a p l 3 5 1 2 , i s s t r o n g l y r e c o m m e n d e d t o s u p p r e s s t h e r i n g i n g d u r i n g s h o r t - c i r c u i t f a u l t e v e n t . w i t h o u t t h e b y - p a s s c a p a c i t o r , t h e o u t p u t s h o r t m a y c a u s e s u f f i c i e n t r i n g - i n g o n t h e i n p u t ( f r o m s u p p l y l e a d i n d u c t a n c e ) t o d a m a g e i n t e r n a l c o n t r o l c i r c u i t r y . o u t p u t c a p a c i t o r a l o w - e s r 1 0 m f m l c c , a l u m i n u m e l e c t r o l y t i c o r t a n t a - l u m b e t w e e n v o u t a n d g n d i s s t r o n g l y r e c o m m e n d e d t o r e d u c e t h e v o l t a g e d r o o p d u r i n g h o t - a t t a c h m e n t o f d o w n s t r e a m p e r i p h e r a l . h i g h e r - v a l u e o u t p u t c a p a c i t o r i s b e t t e r w h e n t h e o u t p u t l o a d i s h e a v y . a d d i t i o n a l l y , b y p a s s - i n g t h e o u t p u t w i t h a 0 . 1 m f c e r a m i c c a p a c i t o r i m p r o v e s t h e i m m u n i t y o f t h e d e v i c e t o s h o r t - c i r c u i t t r a n s i e n t s . layout consideration t h e p c b l a y o u t s h o u l d b e c a r e f u l l y p e r f o r m e d t o m a x i - m i z e t h e r m a l d i s s i p a t i o n a n d t o m i n i m i z e v o l t a g e d r o p , d r o o p a n d e m i . t h e f o l l o w i n g g u i d e l i n e s m u s t b e c o n s i d e r e d : 1 . p l e a s e p l a c e t h e i n p u t c a p a c i t o r s n e a r t h e v i n p i n a s c l o s e a s p o s s i b l e . 2 . o u t p u t d e c o u p l i n g c a p a c i t o r s f o r l o a d m u s t b e p l a c e d n e a r t h e l o a d a s c l o s e a s p o s s i b l e f o r d e c o u p l i n g h i g h - f r e q u e n c y r i p p l e s . 3 . l o c a t e a p l 3 5 1 2 a n d o u t p u t c a p a c i t o r s n e a r t h e l o a d t o r e d u c e p a r a s i t i c r e s i s t a n c e a n d i n d u c t a n c e f o r e x c e l - l e n t l o a d t r a n s i e n t p e r f o r m a n c e . 4 . t h e n e g a t i v e p i n s o f t h e i n p u t a n d o u t p u t c a p a c i t o r s a n d t h e g n d p i n m u s t b e c o n n e c t e d t o t h e g r o u n d p l a n e o f t h e l o a d . 5 . k e e p v i n a n d v o u t t r a c e s a s w i d e a n d s h o r t a s p o s s i b l e . during soft-start process, the output bulk capacitor draws inrush current from v in . if the inrush current reaches foldback current-limit threshold, namely 0.8a, the output current will be clamped in 0.8a level. it will take longer to complete the soft-start process since the soft-start rate is controlled neither by internal soft-start nor by external soft-start circuitry. when the c out meets the following formula, the soft-start will be controlled by foldback cur- rent-limiting: c out > (0.8xt ss )/v in w h e r e , t s s i s 1 m s w h e n s s i s o p e n o r t i e d t o v i n , o r o b t a i n e d b y t h e t s s e q u a t i o n , d e s c r i b e d i n t h e p a r a g r a p h o f s o f t - s t a r t i n f u n c t i o n a l d e s c r i p t i o n s e c t i o n w h e n c s s i s u s e d . i f t h e s o f t - s t a r t r a t e i s c o n t r o l l e d b y t h e f o l d b a c k c u r r e n t - l i m i t i n g , t h e s o f t - s t a r t t i m e c a n b e g o t b y t h e f o l l o w i n g e q u a t i o n : t s s _ f o l d b a c k = ( c o u t x v i n ) / 0 . 8 s o f t - s t a r t c a p a c i t o r t h e a p l 3 5 1 2 h a s a b u i l t - i n a d j u s t a b l e s o f t - s t a r t c o n t r o l f o r u s e r t o s e t a n o p t i m u m s o f t - s t a r t t i m e f o r t h e a p p - l i c a t i o n . t h e s o f t - s t a r t t i m e c a n b e c a l c u l a t e d b y t h e e q u a t i o n , d e s c r i b e d i n t h e p a r a g r a p h o f s o f t - s t a r t i n f u n c - t i o n a l d e s c r i p t i o n s e c t i o n . p l e a s e n o t e t h a t t h e r e a r e m i n i - m u m a n d m a x i m u m l i m i t a t i o n s o f s o f t - s t a r t c a p a c i t o r . i f t h e v a l u e o f s o f t - s t a r t c a p a c i t o r i s l e s s t h a n t h e m i n i m u m l i m i t a t i o n o r h i g h e r t h a n t h e m a x i m u m l i m i t a t i o n ( p l e a s e r e f e r t o t h e 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 ) , t h e s o f t - s t a r t t i m e w i l l b e c o m e i n t e r n a l l y c o n t r o l l e d a s i f t h e r e i s n o c s s , t s s = 2 m s w h e n v i n = 5 v , f o r e x a m p l e . i f a s o f t - s t a r t c a p a c i t o r i s u s e d , p l e a s e m a k e s u r e t h e c s s i s i n t h e r e c o m m e d e d o p e r a t i n g r a n g e . 0 . 0 5 0 . 02 0 . 1 0 . 037 0 . 075 unit : inch r e c o m m e n d e d m i n i m u m f o o t p r i n t s o t - 2 3 - 5
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 1 4 r e c o m m e n d e d m i n i m u m f o o t p r i n t s o p - 8 6 . 0 1 . 3 1 . 27 0 . 5 1 2 3 4 8 7 6 5 unit : mm
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 1 5 p a c k a g e i n f o r m a t i o n s o t - 2 3 - 5 max. 0.057 0.051 0.024 0.006 0.009 0.020 0.012 l 0.30 0 e e1 e1 e d c b 0.08 0.30 0.60 0.012 0.95 bsc 1.90 bsc 0.22 0.50 0.037 bsc 0.075 bsc 0.003 min. millimeters s y m b o l a1 a2 a 0.00 0.90 sot-23-5 max. 1.45 0.15 1.30 min. 0.000 0.035 inches 8 0 8 0 b c e1 0 l view a 0 . 2 5 gauge plane seating plane a a 2 a 1 e d e e 1 see view a 1.40 2.60 1.80 3.00 2.70 3.10 0.122 0.071 0.118 0.102 0.055 0.106 note : 1. follow jedec to-178 aa. 2. dimension d and e1 do not include mold flash, protrusions or gate burrs. mold flash, protrusion or gate burrs shall not exceed 10 mil per side.
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 1 6 p a c k a g e i n f o r m a t i o n s o p - 8 a a 1 a 2 l view a 0 . 2 5 seating plane gauge plane note: 1. follow jedec ms-012 aa. 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. s y m b o l min. max. 1.75 0.10 0.17 0.25 0.25 a a1 c d e e1 e h l millimeters b 0.31 0.51 sop-8 0.25 0.50 0.40 1.27 min. max. inches 0.069 0.004 0.012 0.020 0.007 0.010 0.010 0.020 0.016 0.050 0 0.010 1.27 bsc 0.050 bsc a2 1.25 0.049 0 8 0 8 3.80 5.80 4.80 4.00 6.20 5.00 0.189 0.197 0.228 0.244 0.150 0.157 d e e e 1 see view a c b h x 4 5 seating plane < 4 mils -t-
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 1 7 p a c k a g e i n f o r m a t i o n t d f n 2 x 2 - 6 s y m b o l min. max. 0.80 0.00 0.18 0.30 1.00 1.60 0.05 0.60 a a1 b d d2 e e2 e l millimeters a3 0.20 ref tdfn2x2-6 0.30 0.45 1.00 0.008 ref min. max. inches 0.031 0.000 0.007 0.012 0.039 0.063 0.024 0.012 0.018 1.90 2.10 0.075 0.083 1.90 2.10 0.075 0.083 0.20 k 0.008 0.70 0.039 0.028 0.002 0.65 bsc 0.026 bsc note : 1. followed from jedec mo-229 wccc. e l k e 2 pin 1 corner d2 a3 a1 b a d e
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 1 8 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 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 application a h t1 c d d w e1 f 178.0 ? 2.00 50 min. 8.4+2.00 - 0.00 13.0+0.50 - 0.20 1.5 min. 20.2 min. 8.0 ? 0.30 1.75 ? 0.10 3.5 ? 0.05 p 0 p1 p 2 d 0 d1 t a 0 b 0 k 0 sot - 23 - 5 4.0 ? 0.10 4.0 ? 0.10 2.0 ? 0.05 1.5+0.10 - 0.00 1.0 min. 0.6+0.00 - 0.4 0 3.20 ? 0.20 3.10 ? 0.20 1.50 ? 0.20 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 - 8 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 - 0.40 6.40 ? 0.20 5.20 ? 0.20 2.10 ? 0.20 application a h t1 c d d w e1 f 178.0 ? 2.00 50 min. 8.4+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 tdfn2x2 - 6 4.0 ? 0.10 4.0 ? 0.10 2.0 ? 0.05 1.5+0.10 - 0.00 1.5 min. 0.6+0.00 - 0.40 2.35 + 0.20 2.35 + 0.20 1.30 ? 0.20 (mm)
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 1 9 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 s o t - 2 3 - 5 user direction of feed s o p - 8 user direction of feed d e v i c e s p e r u n i t package type unit quantity sot - 23 - 5 tape & reel 3000 sop - 8 tape & reel 2500 tqfn2x2 - 6 tape & reel 3000 t d f n 2 x 2 - 6 user direction of feed
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 2 0 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 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 p r o f i l e
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 . 6 - a u g . , 2 0 1 2 a p l 3 5 1 2 w w w . a n p e c . c o m . t w 2 1 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 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 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 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 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 ( c o n t . )

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