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features applications description n n n n n output current: up to 3a output voltage: 0.6v to v input voltage: 2.7 to 5.5v efficiency up to 95% 42 a (typ) no load quiescent current shutdown current: <1 a 100% duty cycle operation 1.5mhz switching frequency analog soft start no external compensation required current limit protection thermal shutdown sop-8(ep), dfn3x3-10 and qfn3x3-16 package 5v or 3.3v point of load conversion telecom/networking equipment set top boxes storage equipment video cards ddr power supply t h e pa m 2 3 0 3 i s a 3 a s t e p - d o w n d c - d c con verter. it operates in two different modes: p s m a n d p w m m o d e s . a t l i g h t l o a d , i t automactically enters into the psm mode to improve efficiency. at heavy load, the constant- frequency p wm control per for ms exc ellent stability and transient response. no external compensation components are required the pam2303 supports a range of input voltages fr om 2.7 v to 5.5 v. t he ou tput v olta ge is adjustable from 0.6v to the input voltage. the pam2303 employs internal power switch and synchronous rectifier to min imize external part c o u n t a n d r e a l i z e h i g h e ff i c i e n c y. d u r i n g shutdown, the input is disconnected from the output and the shutdown current is less than 1 a. other key features include over-temperature and sh or t c ir c uit p r otec ti on , and u nde r -v ol tag e lockout to prevent deep battery discharge. the pam2303 delivers 3a maximum output current while consuming only 42 a of no-load quiescent current. ultra-low rds(on) integrated mosfets and 100% duty cycle operation make the pam2303 an ideal choice for hig h output voltage, high current applications which require a low dropout threshold. t h e pa m 2 3 0 3 i s a v a i l a b l e i n s o p - 8 ( e p ) , dfn3x3-10, and qfn3x3-16 package. in n n n n n n n n n n n n n n . typical application 1 www.poweranalog.com 11/2011 rev1.2 , power analog microelectronics inc pam2303 3a low noise step-down dc-dc converter 1 0 . 6 1 2 o r v r ? ? = ? + ? ? ? ? u 1 p a m 2 3 0 7 p v i n v i n e n t e s t s w f b c 1 c 2 l 1 1 2 r 1 r 2 c 3 1 0 0 p f r 3 1 k c 4 1 u f 2 2 u f 2 2 u f v i n v o u t 30uf pam2303 40uf
block diagram 2 pin configuration & marking information , power analog microelectronics inc www.poweranalog.com pam2303 3a low noise step-down dc-dc converter en r1 r2 fb + - iamp + - ircmp sw pgnd synchronous rectifier nch ( ) main switch pch ( ) pvin comp vin shutdown osc rs latch 0.6vref freq shift - + ea s q r q switching logic and blanking circuit slope comp 1.5m osc anti shoot thru - - test vin gnd 11/2011 rev1.2 top view sop-8(ep) 1 2 3 4 8 7 6 5 p2303b xxxyw a/b: y: year w: week x: internal code pin configuration n a m e q f n 3 x 3 - 1 6 s o p - 8 ( e p ) f u n c t i o n p g n d 1 , 2 , 3 2 m a i n p o w e r g r o u n d p i n f b 4 3 f e e d b a c k v o l t a g e t o i n t e r n a l e r r o r a m p l i f i e r , t h e t h r e s h o l d v o l t a g e i s 0 . 6 v . g n d 5 4 s i g n a l g r o u n d f o r s m a l l s i g n a l c o m p o n e n t s . n c 6 , 1 6 - n o c o n n e c t e d e n 7 5 e n a b l e c o n t r o l i n p u t . f o r c e t h i s p i n v o l t a g e a b o v e 1 . 5 v , e n a b l e s t h e c h i p , a n d b e l o w 0 . 3 v s h u t s d o w n t h e d e v i c e . t e s t 8 6 t e s t m o d e . ? l o w ? c o n n e c t i o n i s r e c o m m e n d e d . v i n 9 7 b i a s s u p p l y . c h i p m a i n p o w e r s u p p l y p i n p v i n 1 0 , 1 1 , 1 2 8 i n p u t s u p p l y f o r p o w e r s t a g e . m u s t b e c l o s e l y d e c o u p l e d t o p g n d s w 1 3 , 1 4 , 1 5 1 t h e d r a i n s o f t h e i n t e r n a l m a i n a n d s y n c h r o n o u s p o w e r m o s f e t . pin description 12 11 10 9 13 14 15 16 1 2 3 4 8 7 6 5 fb pgnd pgnd pgnd pvin pvin vin pvin p2303a xxxyw top view qfn 3x3-16
3 absolute maximum ratings these are stress ratings only and functional operation is not implied. exposure to absolute maximum ratings for prolonged time periods may affect device reliability. all voltages are with respect to ground. input voltage pv ,v ......................................6v en pin voltage...................................- in in sw pin voltage......................-0.3v to (pv +0.3v) fb pin voltage.........................-0.3v to (v +0.3v) 0.3v to -6v maximum junction temperature..................150c storage temperature range...........-65c to 150c soldering temperature.......................300c, 5sec in in recommended operating conditions supply voltage..................................2.7v to 5.5v c c c c junction temperature range..........-40 to 125 ambient temperature range...........-40 to 85 thermal information p a r a m e t e r s y m b o l p a c k a g e m a x i m u m u n i t s o p - 8 ( e p ) 9 0 d f n 3 x 3 - 1 0 6 0 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 ) j a q f n 3 x 3 - 1 6 3 5 c / w s o p - 8 ( e p ) 1 1 d f n 3 x 3 - 1 0 8 . 5 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 ) j c q f n 3 x 3 - 1 6 1 1 c / w , power analog microelectronics inc www.poweranalog.com pam2303 3a low noise step-down dc-dc converter pin configuration & marking information 11/2011 rev1.2 pin description n a m e d f n 3 x 3 - 1 0 f u n c t i o n s w 1 , 2 , 3 t h e d r a i n s o f t h e i n t e r n a l m a i n a n d s y n c h r o n o u s p o w e r m o s f e t . g n d 4 g n d e n 5 e n a b l e c o n t r o l i n p u t . f o r c e t h i s p i n v o l t a g e a b o v e 1 . 5 v , e n a b l e s t h e c h i p , a n d b e l o w 0 . 3 v s h u t s d o w n t h e d e v i c e . f b 6 f e e d b a c k v o l t a g e t o i n t e r n a l e r r o r a m p l i f i e r , t h e t h r e s h o l d v o l t a g e i s 0 . 6 v . n c 7 n o c o n n e c t e d v i n 8 , 9 , 1 0 b i a s s u p p l y . c h i p m a i n p o w e r s u p p l y p i n c: pin configuration y: year w: week x: internal code (exposed pad) sw sw sw gnd en 1 2 3 4 5 vin vin vin nc fb 10 9 8 7 6 p2303c xxxyw gnd top view dfn3x3-10
electrical characteristic t =25 , unless otherwise noted. a c vin=3.6v, vo=1.8v, cin=33uf,co=22uf, l=2.2uh, 4 , power analog microelectronics inc www.poweranalog.com p a r a m e t e r s y m b o l t e s t c o n d i t i o n s m i n t y p m a x u n i t s i n p u t v o l t a g e r a n g e v i n 2 . 7 5 . 5 v o u t p u t v o l t a g e r a n g e v o 0 . 6 v i n v v i n r i s i n g 2 . 4 2 . 5 v h y s t e r e s i s 2 4 0 m v u v l o t h r e s h o l d v u v l o v i n f a l l i n g 1 . 8 v r e g u l a t e d o u t p u t v o l t a g e a c c u a r y v o i o = 0 t o 3 a - 3 + 3 % r e g u l a t e d f e e d b a c k v o l t a g e v f b 0 . 5 9 1 0 . 6 0 . 6 0 9 v f b l e a k a g e c u r r e n t i f b v o = 1 v - 5 0 + 5 0 n a o u t p u t v o l t a g e l i n e r e g u l a t i o n l n r v i n = 2 . 5 v t o 5 v 0 . 2 % / v o u t p u t v o l t a g e l o a d r e g u l a t i o n l d r i o = 0 a t o 3 a 0 . 5 % / a q u i e s c e n t c u r r e n t i q n o l o a d 4 2 9 0 a s h u t d o w n c u r r e n t i s d v e n = 0 v 1 a c u r r e n t l i m i t i l i m 4 a o s c i l l a t o r f r e q u e n c y f o s c 1 . 2 1 . 5 1 . 8 m h z h i g h s i d e 8 5 m d r a i n - s o u r c e o n - s t a t e r e s i s t a n c e r d s ( o n ) l o w s i d e 6 0 m h i g h e f f i c i e n c y 9 5 % p s m t h r e s h o l d i t h v i n = 3 . 3 v , v o = 1 . 2 v , l = 1 u h 4 5 0 m a a n a l o g s o f t s t a r t t i m e t s f r o m e n a b l e t o o u t p u t r e g u l a t i o n 0 . 5 m s e n t h r e s h o l d h i g h v e h 1 . 5 v e n t h r e s h o l d l o w v e l 0 . 3 v e n l e a k a g e c u r r e n t i e n v i n = v e n = 0 v - 1 . 0 1 . 0 a o v e r t e m p e r a t u r e p r o t e c t i o n o t p 1 5 0 c o t p h y s t e r e s i s o t h 3 0 c pam2303 3a low noise step-down dc-dc converter 11/2011 rev1.2
5 , power analog microelectronics inc www.poweranalog.com pam2303 3a low noise step-down dc-dc converter efficiency vs output current ( ) vo=1.8v efficiency vs output current (vo=3.3v) efficiency vs output current (vo=1.2v) efficienvy vs input voltage (vo=1.2v) efficienvy vs input voltage (vo=1.8v) efficienvy vs input voltage (vo=3.3v) typical performance characteristics c t =25 , c =33uf,co=22 f unless otherwise noted. a in 11/2011 rev1.2 0 % 1 0 % 2 0 % 3 0 % 4 0 % 5 0 % 6 0 % 7 0 % 8 0 % 9 0 % 1 0 0 % 1 1 0 1 0 0 1 0 0 0 1 0 0 0 0 o u t p u t c u r r e n t ( m a ) 3 . 3 v 4 . 2 v 5 v 0 % 1 0 % 2 0 % 3 0 % 4 0 % 5 0 % 6 0 % 7 0 % 8 0 % 9 0 % 1 0 0 % 1 1 0 % 1 1 0 1 0 0 1 0 0 0 1 0 0 0 0 o u t p u t c u r r e n t ( m a ) 4 . 2 v 5 v 5 . 5 v 0 % 1 0 % 2 0 % 3 0 % 4 0 % 5 0 % 6 0 % 7 0 % 8 0 % 9 0 % 1 0 0 % 2 2 . 5 3 3 . 5 4 4 . 5 5 5 . 5 6 i n p u t v o l t a g e ( v ) 0 . 1 a 1 a 3 a 0 % 1 0 % 2 0 % 3 0 % 4 0 % 5 0 % 6 0 % 7 0 % 8 0 % 9 0 % 1 0 0 % 2 2 . 5 3 3 . 5 4 4 . 5 5 5 . 5 6 i n p u t v o l t a g e ( v ) 0 . 1 a 1 a 3 a 0 % 1 0 % 2 0 % 3 0 % 4 0 % 5 0 % 6 0 % 7 0 % 8 0 % 9 0 % 1 0 0 % 3 3 . 5 4 4 . 5 5 5 . 5 6 i n p u t v o l t a g e ( v ) 0 . 1 a 1 a 3 a 0 % 1 0 % 2 0 % 3 0 % 4 0 % 5 0 % 6 0 % 7 0 % 8 0 % 9 0 % 1 0 0 % 1 1 0 1 0 0 1 0 0 0 1 0 0 0 0 o u t p u t c u r r e n t ( m a ) 3 . 3 v 4 . 2 v 5 v
6 , power analog microelectronics inc www.poweranalog.com pam2303 3a low noise step-down dc-dc converter output voltage vo=1.8v vs output current ( ) output voltage vs output current (vo=1.2v) load regulation (vo=1.2v) load regulation (vo=1.8v) load regulation (vo=3.3v) typical performance characteristics c t =25 , c =33uf,co=22 f unless otherwise noted. a in 11/2011 rev1.2 output voltage vo=3.3v vs output current ( ) 1 . 1 6 1 . 1 6 5 1 . 1 7 1 . 1 7 5 1 . 1 8 1 . 1 8 5 1 . 1 9 1 . 1 9 5 1 . 2 0 5 0 0 1 0 0 0 1 5 0 0 2 0 0 0 2 5 0 0 3 0 0 0 o u t p u t c u r r e n t ( m a ) 3 . 3 v 4 . 2 v 5 v - 2 . 0 % - 1 . 8 % - 1 . 6 % - 1 . 4 % - 1 . 1 % - 0 . 9 % - 0 . 7 % - 0 . 5 % - 0 . 3 % - 0 . 1 % 0 . 1 % 1 1 0 1 0 0 1 0 0 0 1 0 0 0 0 o u t p u t c u r r e n t ( m a ) 3 . 3 v 4 . 2 v 5 v 1 . 7 6 1 . 7 7 1 . 7 8 1 . 7 9 1 . 8 1 . 8 1 1 . 8 2 0 5 0 0 1 0 0 0 1 5 0 0 2 0 0 0 2 5 0 0 3 0 0 0 o u t p u t c u r r e n t ( m a ) 3 . 3 v 4 . 2 v 5 v - 2 . 0 % - 1 . 8 % - 1 . 6 % - 1 . 4 % - 1 . 2 % - 1 . 0 % - 0 . 8 % - 0 . 6 % - 0 . 4 % - 0 . 2 % 0 . 0 % 1 1 0 1 0 0 1 0 0 0 1 0 0 0 0 o u t p u t c u r r e n t ( m a ) 3 . 3 v 4 . 2 v 5 v 3 . 2 6 3 . 2 6 5 3 . 2 7 3 . 2 7 5 3 . 2 8 3 . 2 8 5 3 . 2 9 0 5 0 0 1 0 0 0 1 5 0 0 2 0 0 0 2 5 0 0 3 0 0 0 o u t p u t c u r r e n t ( m a ) 4 . 2 v 5 v 5 . 5 v - 1 . 0 % - 0 . 8 % - 0 . 6 % - 0 . 4 % - 0 . 2 % 0 . 1 % 1 1 0 1 0 0 1 0 0 0 1 0 0 0 0 o u t p u t c u r r e n t ( m a ) 4 . 2 v 5 v 5 . 5 v
pam2303 3a low noise step-down dc-dc converter www.poweranalog.com , power analog microelectronics inc 7 rdson vs input voltage 1 . 5 0 1 . 5 2 1 . 5 4 1 . 5 6 1 . 5 8 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 t e m p e r a t u r e ( quiescent current vs input voltage typical performance characteristics c t =25 , c =33uf,co=22 f unless otherwise noted. a in 11/2011 rev1.2 oscillator frequency vs temperature oscillator frequency vs input voltage vin =3.6v 5 0 6 0 7 0 8 0 9 0 1 0 0 1 1 0 2 2 . 5 3 3 . 5 4 4 . 5 5 5 . 5 6 i n p u t v o l t a g e ( v ) p - 0 . 1 a n - 0 . 1 a 3 0 3 2 3 4 3 6 3 8 4 0 4 2 4 4 2 2 . 5 3 3 . 5 4 4 . 5 5 5 . 5 6 i n p u t v o l t a g e ( v ) v o 1 . 2 v v o 1 . 8 v v o 3 . 3 v 0 . 5 8 4 0 . 5 8 6 0 . 5 8 8 0 . 5 9 0 0 . 5 9 2 0 . 5 9 4 0 . 5 9 6 0 . 5 9 8 0 . 6 0 0 0 . 6 0 2 2 3 4 5 6 i n p u t v o l t a g e i = 1 0 0 m a i = 6 0 0 m a i = 8 0 0 m a reference voltage vs input voltage reference voltage vs temperature 1 . 3 0 1 . 3 2 1 . 3 4 1 . 3 6 1 . 3 8 1 . 4 0 1 . 4 2 1 . 4 4 1 . 4 6 1 . 4 8 1 . 5 0 2 . 5 3 3 . 5 4 4 . 5 5 5 . 5 i n p u t v o l t a g e ( v ) 0 . 5 8 0 . 5 8 2 0 . 5 8 4 0 . 5 8 6 0 . 5 8 8 0 . 5 9 0 . 5 9 2 0 . 5 9 4 0 . 5 9 6 0 . 5 9 8 0 . 6 2 5 5 0 7 5 1 0 0 1 2 5 1 5 0 t e m p e r a t u r e io=3a
8 , power analog microelectronics inc www.poweranalog.com application information pam2303 3a low noise step-down dc-dc converter the basic pam2303 application circuit is shown in page 1. external component selection is determined by the load requirement, selecting l first and then cin and cout. for most applications, the value of the inductor will fall in the range of 1h to 3.3h. its value is chosen based on the desired ripple current and efficiency. large value inductors lower ripple current and small value inductors result in higher ripple currents. higher v or vout also increases the ripple current as shown in equation 3a reasonable starting point for setting ripple current is i = 1.2a (40% of 3a). (1) the dc current rating of the inductor should be at least equal to the maximum load current plus half the ripple current to prevent core saturation. thus, a 4.2a rated inductor should be enough for most applications (3a + 1.2a). for better efficiency, choose a low dc-resis tance inductor. in continuous mode, the source current of the top m osfet is a square wave of duty cycle vout/vin. to prevent large voltage transients, a low esr input capacitor sized for the maximum rms current must be used. the maximum rms capacitor current is given by: this formula has a maximum at v =2vout, w h e r e i = i / 2 . t h i s s i m p l e w o r s t - c a s e condition is com monly used for design because even significant deviations do not offer much relief. note that the capacitor manufacturer's ripple current ratings are often based on 2000 hours of life. this makes it advis able to further derate the capacitor, or choose a capacitor rated at a higher temperature than required. consult the manufac turer if there is any question. the selection of cout is driven by the required effective series resistance (esr). typically, once the esr requirement for cout has been met, the rms current rating generally far exceeds the i (p-p) requirement. the output ripple vout is determined by: where f = operating frequency, c =output capacitance and i = ripple current in the inductor. for a fixed output voltage, the output ripple is highest at maximum input voltage since i increases with input voltage. higher values, lower cost ceramic capacitors are now becoming available in smaller case sizes. their high ripple current, high voltage rating and low esr make them ideal for switching regulator applications. using ceramic capacitors can achieve very low output ripple and small circuit size. when choosing the input and output ceramic capacitors, choose the x5r or x7r dielectric formul ations. these dielectrics have the best temperature and voltage charac teristics of all the ceramics for a given value and size. inductor selection c and c selection using ceramic input and output capacitors in l in r m s o u t ripple out l l in out thermal consideration thermal protection limits power dissipation in the pam2303. when the junction temperature exceeds 150c, the otp (over temperature protection) starts the thermal shutdown and turns the pass transistor off. the pass transistor r e s u m e s o p e r a t i o n a f t e r t h e j u n c t i o n temperature drops below 120c. f o r c o n t i n u o u s o p e r a t i o n , t h e j u n c t i o n temperature should be maintained below 125c. the power dissipation is defined as: i is the step-down converter quiescent current. the term tsw is used to estimate the f ull load step-down converter switching losses. q ( ) 1 2 o u t i n o u t i n r m s o m a x i n v v v c r e q u i r e d i i v - ? ? ? ? @ ( ) ( ) ? ? d ? ? ? ? o u t o u t l i n 1 v i = v 1 - f l v ( ) ( ) o d s o n h i n o d s o n l 2 d o s w s o q i n i n v r + v - v r p = i + t f i + i v v v o 1 . 2 v 1 . 5 v 1 . 8 v 2 . 5 v 3 . 3 v l 1 h 1 . 5 h 2 . 2 h 2 . 2 h 3 . 3 h v o u t i l ( e s r + 1 / 8 f c o u t ) 11/2011 rev1.2
pam2303 3a low noise step-down dc-dc converter for the condition where the step-down converter is in dropout at 100% duty cycle, the total device dis sipation reduces to: since r , quiescent current, and switching losses all vary with input voltage, the total losses should be investigated over the complete input voltage range. the maximum power dissipation de pend s on th e ther ma l r esi sta nc e of ic package, pcb layout, the rate of surrounding airflow and temperature difference between junction and ambient. the maximum power dissipation can be calc ulated by the following formula: where tj(max) is the maximum allowable junction temperature 125c.t is the ambient temperature and is the thermal resistance from the junction to the ambient. based on the standard jedec for a two layers thermal test board, the thermal resistance of qfn3x3-16 68c/w and sop-8(ep) 90c/w respectively. the maximum power dissipation at t = 25c can be calculated by following formula: p =(125c-25c)/68c/w=1.47w(qfn3x3-16) p =(125c-25c)/90c/w=1.11w(sop-8) the i nternal reference is 0.6v (typical). the output voltage is calculated as below: the output voltage is given by table 1. resistor recommend for output voltage setting when load current decreases, the peak switch current in power-pmos will be lower than skip current threshold and the device will enter into pulse skipping mode. in this mode, the device has two states, working state and idle state. first, the device enters into wor k in g s tat e c ont ro ll ed by in ter n al e r ro r amplifier.when the feedback vol tage gets higher than internal reference voltage, the device will enter into low i idle state with most of internal blocks disabled. the output voltage will be reduced by loading or leakage current. when the feedback voltage gets lower than the internal reference voltage, the convertor will start a working state again. as the input voltage approaches the output voltage, the converter turns the p-chan nel transistor continuously on. in this mode the output voltage is equal to the input voltage min us th e voltag e d rop ac ros s the p - c hannel transistor: v = v ?i (r + r ) where r = p-channel switch on resistance, i = o ut pu t c u rr e n t, r = i nd uc t or dc resistance the reference and the circuit remain reset until the vin crosses its uvlo threshold. the pam2303 has an internal soft-start circuit that limits the in-rush current during start-up. this prevents possible voltage drops of the input voltage and eliminates the output voltage overshoot. the soft-start make the output voltage rise up smoothly. the switch peak current is limited cycle-by-cycle to a typical value of 4a. in the event of an output voltage short circuit, the device operates with a frequency of 500khz and minimum duty cycle, therefore the average input current is more smaller than current limit. when the die temperature exceeds 150c, a reset occurs and the reset remains until the temperature decrease to 120c, at which time the circuit can be restarted. ds(on) a ja ja a d d q out in load dson l dson l o a d l setting the output voltage table 1: pulse skipping mode (psm) description 100% duty cycle operation uvlo and soft-start short circuit protection thermal shutdown ? ? ? ? ? ? o r 1 v = 0 . 6 1 + r 2 v o r 1 r 2 1 . 2 v 1 5 0 k 1 5 0 k 1 . 5 v 2 2 5 k 1 5 0 k 1 . 8 v 3 0 0 k 1 5 0 k 2 . 5 v 4 7 5 k 1 5 0 k 3 . 3 v 6 8 0 k 1 5 0 k 2 d o d s o n h q i n p = i r + i v j ( m a x ) a d j a t - t p = 9 , power analog microelectronics inc www.poweranalog.com 11/2011 rev1.2
ordering information 1 0 , power analog microelectronics inc www.poweranalog.com 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 o u t p u t v o l t a g e a t y p e 1 6 p i n s j : q f n 3 x 3 - 1 6 e : 1 6 a d j : a d j b t y p e 8 p i n s e : s o p - 8 ( e p ) c : 8 a d j : a d j c t y p e 1 0 p i n s f : d f n 3 x 3 - 1 0 g : 1 0 a d j : a d j p a r t n u m b e r o u t p u t v o l t a g e p a c k a g e t y p e s h i p p i n g p a c k a g e p a m 2 3 0 3 a j e a d j r a d j q f n 3 x 3 - 1 6 3 , 0 0 0 u n i t s / t a p e & r e e l p a m 2 3 0 3 b e c a d j r a d j s o p - 8 ( e p ) 2 , 5 0 0 u n i t s / t a p e & r e e l p a m 2 3 0 3 c f g a d j r a d j d f n 3 x 3 - 1 0 3 , 0 0 0 u n i t s / t a p e & r e e l pam 2303 x x x xxx x output voltage number of pins package type pin configuration shipping package pam2303 3a low noise step-down dc-dc converter 11/2011 rev1.2
outline dimensions 1 1 , power analog microelectronics inc www.poweranalog.com pam2303 3a low noise step-down dc-dc converter sop-8(ep) 11/2011 rev1.2
outline dimensions 12 , power analog microelectronics inc www.poweranalog.com pam2303 3a low noise step-down dc-dc converter dfn3x3-10 11/2011 rev1.2
outline dimensions 13 , power analog microelectronics inc www.poweranalog.com pam2303 3a low noise step-down dc-dc converter 11/2011 rev1.2 qfn3x3-16 d i m e n s i o n s ( m i l l i e t e r s ) m i n t y p m a x a 0 . 5 0 0 . 5 5 0 . 6 0 a 1 0 . 0 0 0 . 0 2 0 . 0 5 a 2 0 . 2 0 b 0 . 1 8 0 . 2 5 0 . 3 0 d 2 . 9 0 3 . 0 0 3 . 1 0 d 1 1 . 5 5 1 . 7 0 1 . 8 0 e 2 . 9 0 3 . 0 0 3 . 1 0 e 1 1 . 5 5 1 . 7 0 1 . 8 0 e 0 . 5 0 b s c l 0 . 3 0 0 . 4 0 0 . 5 0 n 1 6 a a a 0 . 0 8 b b b 0 . 1 0

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