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ap 2303 document number: ds 36546 rev. 3 - 2 1 of 15 www.diodes.com september 2014 ? diodes incorporated ap2303 a product line of diodes incorporated new product ddr bus termination regulator description the ap2303 is a low dropout linear regulator to generate termination voltage of ddr - sdram system. the regulator can source or sink up to 1.75a current con tinuously. the output voltage is regulated to track tightly with the reference voltage (1/2v ddq ) within 10mv . the ap2303 supports soft start - up when used to turn on the vcntl and vrefen. it integrates a shutdown circuit that will be triggered once the voltage of vin, vcntl or vrefen falls below a certain value . ap2303 features over temperature protection and current limit protection for both source and sink . ap2303 is available in packages of soic - 8 and psop - 8 . features ? support ddr - ii (v tt =0.9v), ddr - iii (v tt =0.75v), ddr - iiil (v tt =0.675v), ddr - iv (v tt =0.6v) application ? source and sink up to 1.75a current ? output voltage accuracy over full load: 2% (max.) ? soft start - up and shutdown along with v in , v cntl and v refen rising and shutdown along with v in , v cntl and v refen dropping ? flexible output by 2 external resistors ? requires minimum 10f output ceramic capacitor for application ? current limit protection for both source and sink ? otsd protection ? totally lead - free & fully rohs compliant (notes 1 & 2) ? halo gen and antimony free. green device (note 3 ) pin assignments (top view) soic - 8 (top view) psop - 8 applications ? ddr - ii/ddr - iii/ddr - iiil/ddr - iv memory system ? desktop pc, notebook mother board ? graphic card ? stb, lcd - tv, web - tv note s: 1 . no purposely added lead. fully eu directive 2002/95/ec (rohs) & 2011/65/eu (rohs 2) compliant. 2. see http://www.diodes.com/quality/lead_free.html for more information about diodes incorporateds definitions of hal ogen - and antimony - free, "green" and lead - f ree . 3. halogen - and antimony - free "green products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total br + cl) and <1000ppm antimony compounds. typical applications circuit v i n v c n t l v r e f e n a p 2 3 0 3 v o u t g n d r t t c o u t v c n t l = 3 . 3 v / 5 v r 1 r 2 c s s c c n t l c i n v i n = 1 . 8 v / 1 . 5 v / 1 . 3 5 v / 1 . 2 v r d u m m y 1 4 2 3 6 s h u t d o w n e n a b l e 1 2 3 4 8 7 6 5 vout gnd vin nc nc v cntl nc vrefen e xposed pad vin gnd vrefen vout nc nc vcntl nc 1 2 3 4 8 7 6 5
ap 2303 document number: ds 36546 rev. 3 - 2 2 of 15 www.diodes.com september 2014 ? diodes incorporated ap2303 a product line of diodes incorporated new product pin description s pin number p in name function 1 vin unregulated input supply. a small 10f mlcc should be connected from this pin to gnd. 2 gnd ground 3 vrefen reference voltage input and active low shutdown control pin. pulling the pin to ground turns off device by bjt or fet. when it is released, a soft - start will take for about 0.1ms. 4 vout regulated voltage output. a minimum of 10f ceramic capacitor to ground is required to assure stability. 5, 7, 8 nc no connection 6 vcntl vcntl supplies the internal control circuitry and provides the drive voltage. C exposed pad the exposed pad should be connected to ground copper for better heat dissipation performance. functional block diagram e n a b l e t h e r m a l s h u t d o w n c u r r e n t l i m i t e r r o r a m p l i f i e r a n d s o f t s t a r t p o w e r o n r e s e t v c n t l e n v r e f o t s d p o r v i n v r e f e n v o u t g n d 6 3 1 4 2
ap 2303 document number: ds 36546 rev. 3 - 2 3 of 15 www.diodes.com september 2014 ? diodes incorporated ap2303 a product line of diodes incorporated new product absolute maximum ratings ( note 4 ) symbol parameter rating unit v in power input voltage - 0.3 to 6 v v cntl control input voltage - 0.3 to 6 v v refen reference input voltage - 0.3 to 6 v t stg storage temperature + 150 c t j junction t emperature + 150 c t lead lead temperature (soldering, 10sec) + 260 c ja thermal resistance (junction to ambient) (note 5 ) psop - 8 80 c /w soic - 8 110 j c thermal resistance (junction to case) psop - 8 38 c /w soic - 8 50 esd esd ( human body model) 2000 v esd esd (machine model) 200 v note s: 4 . stresses greater than 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 recommended operating condi tions i s not implied. exposure to absolute maximum ratings for extended periods may affect device reliability. 5 . ja is measured with the component mounted on a 2 - layer fr - 4 board with 2.54cm*2.54cm thermal sink pad in free air. recommended operating conditions symbol parameter min max unit v cntl control input voltage (note 6 ) 3.0 5.5 v v in power input voltage 1.2 5.5 v v refen reference input voltage 0.6 v cntl - 2.2 v t j operating junction temperature range - 40 + 125 c t a operating ambient temperature range - 40 + 85 c note 6 : keep v cntl v in in operation power on and power off sequences.
ap 2303 document number: ds 36546 rev. 3 - 2 4 of 15 www.diodes.com september 2014 ? diodes incorporated ap2303 a product line of diodes incorporated new product electrical characteristics (@ t a = + 25c, v in = 1.8v/1.5v/1.35v/1.2v, v cntl = 3.3v, v refen = 0.9v/0.75v/0.675v/0.6v, c in = 10 f (ceramic), c out = 10 f (ceramic), unless otherwise specified. ) symbol parameter conditions min typ max unit input i vcntl vcntl operating current no load C 0.5 1.5 ma i sd - vcntl vcntl input current in shutdown mode v refen < 0.15v C 30 50 a i sd - vin vin input current in shutdown mode v refen < 0.15v - 1 C 1 a i vrefen vrefen leakage current v refen = 0.75v - 1 C 1 a output v os output offset voltage (note 7 ) no load - 10 0 10 mv v dropout dropout voltage v cntl = 3.3v, i out = 1a C 220 C mv v cntl = 3.3v, i out = 1.5a C 400 C v cntl = 3.3v, i out = 1.75a C 520 C v load load regulation i out = 0a to 1.75a - 20 C 20 mv i out = 0a to - 1.75a - 20 C 20 protection i limit current limit source 1.75 C C a sink C C - 1.75 i short short current v out = 0v C 2 C a v out = v in C - 2 C t shdn thermal shutdown temperature 3.3v v cntl 5v C + 160 C c C thermal shutdown hysteresis C C + 30 C c start - up & shutdown function v ih vrefen shutdown threshold voltage output = high 0.4 C C v v il output = low C C 0.15 v cntl - on vcntl shutdown threshold voltage output = high 2.9 C C v v cntl - off output = low C C 2.2 v in - on vin shutdown threshold voltage output = high 1.1 C C v v in - off output = low C C 0.4 note 7 : v os is the voltage measurement defined as v out subtracted from v refen .
ap 2303 document number: ds 36546 rev. 3 - 2 5 of 15 www.diodes.com september 2014 ? diodes incorporated ap2303 a product line of diodes incorporated new product performance characteristics output offset voltage vs. ambient temperature dropout voltage vs. output current source current limit vs. vcntl input voltage sink current limit vs. vcntl input voltage vcntl operating input current vs. ambient temperature vcntl standby current vs . ambient temperature -40 -20 0 20 40 60 80 100 120 0.0 0.5 1.0 1.5 2.0 2.5 3.0 output offset voltage (mv) ambient temperature ( o c) -40 -20 0 20 40 60 80 100 120 400 450 500 550 600 650 700 vcntl operating input current ( ? a) ambient temperature ( o c) v cntl =5v -40 -20 0 20 40 60 80 100 120 10 15 20 25 30 35 40 vcntl standby current ( ? a) ambient temperature ( o c) v cntl =5v, v refen =0.15v 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 source current limit (a) vcntl input voltage (v) v in =1.5v, v refen =0.75v t a =-40 o c t a =25 o c t a =85 o c 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 dropout voltage (mv) output current (a) v cntl =3.3v t a =-40 o c t a =25 o c t a =85 o c 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0 -1.0 -1.2 -1.4 -1.6 -1.8 -2.0 -2.2 -2.4 -2.6 -2.8 -3.0 -3.2 -3.4 -3.6 -3.8 -4.0 sink current limit (a) vcntl input voltage (v) v in =1.5v, v refen =0.75v t a =-40 o c t a =25 o c t a =85 o c
ap 2303 document number: ds 36546 rev. 3 - 2 6 of 15 www.diodes.com september 2014 ? diodes incorporated ap2303 a product line of diodes incorporated new product performance characteristics (cont.) output voltage vs. source current (ddr - iii) output voltage vs. sink current (ddr - iii) output voltage vs. source current (ddr - iv) output voltage vs. sink current (ddr - iv) vin input current vs. vin input voltage vin input current vs. vcntl input voltage 0.00 -0.25 -0.50 -0.75 -1.00 -1.25 -1.50 -1.75 0.730 0.735 0.740 0.745 0.750 0.755 0.760 0.765 0.770 output voltage (v) sink current (a) v in =1.5v, v cntl =3.3v, v refen =0.75v t a =-40 o c t a =25 o c t a =85 o c 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0 200 400 600 800 1000 1200 1400 1600 1800 2000 vin input current ( ? a) vcntl input voltage (v) v in =1.5v, v refen =0.75v no load t a =-40 o c t a =25 o c t a =85 o c 0.00 -0.25 -0.50 -0.75 -1.00 -1.25 -1.50 -1.75 0.580 0.585 0.590 0.595 0.600 0.605 0.610 0.615 0.620 output voltage (v) sink current (a) v in =1.2v, v cntl =3.3v, v refen =0.6v t a =-40 o c t a =25 o c t a =85 o c 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 0.730 0.735 0.740 0.745 0.750 0.755 0.760 0.765 0.770 output voltage (v) source current (a) v in =1.5v, v cntl =3.3v, v refen =0.75v t a =-40 o c t a =25 o c t a =85 o c 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0 1 2 3 4 5 6 7 vin input current ( ? a) vin input voltage (v) v cntl =5v v refen =0.9v no load 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 0.580 0.585 0.590 0.595 0.600 0.605 0.610 0.615 0.620 output voltage (v) source current (a) v in =1.2v, v cntl =3.3v, v refen =0.6v t a =-40 o c t a =25 o c t a =85 o c
ap 2303 document number: ds 36546 rev. 3 - 2 7 of 15 www.diodes.com september 2014 ? diodes incorporated ap2303 a product line of diodes incorporated new product performance characteristics (cont.) source load transient (ddr - iii) sink load transient (ddr - iii) (c in =c out =10f, i out =0a to 1.75a, (c in =c out =10f, i out =0a to - 1.75a, v in =1.5v, v refen =0.75v, v cntl =3.3v) v in =1.5v, v refen =0.75v, v cntl =3.3v) source load transient (ddr - iv) sink load transient (ddr - iv) (c in =c out =10f, i out =0a to 1.75a, (c in =c out =10f, i out =0a to - 1.75a, v in =1.2v, v refen =0.6v, v cntl =3.3v) v in =1.2v, v refen =0.6v, v cntl =3.3v) vrefen power on vrefen power off (c in =c out =10 f, r load =5 ? , v cntl =5v) (c in =c out =10 f, r load =5 ? , v cntl =5v) v out 20mv/div i out 1a/div time 100 s /div v out 20mv/div i out 1a/div time 100 s /div v in 500mv/div v refen 50mv/div v refen 50mv/div v in 500mv/div v out 20mv/div i out 1a/div time 100 s /div v out 20mv/div i out 1a/div time 100 s /div v refen 50mv/div v in 500mv/div v in 500mv/div v refen 50mv/div v refen 500mv/div i out 200ma/div time 100 s /div v refen 500mv/div i out 200ma/div time 100 s /div v in 1v/div v out 500mv/div v out 500mv/div v in 1v/div
ap 2303 document number: ds 36546 rev. 3 - 2 8 of 15 www.diodes.com september 2014 ? diodes incorporated ap2303 a product line of diodes incorporated new product performance characteristics (cont.) vin power on vin power off (c in =c out =10 f, r load =5 ? , v cntl =5v) (c in =c out =10 f, r load =5 ? , v cntl =5v) vcntl power on vcntl power off (c in =c out =10 f, r load =5 ? ) (c in =c out =10 f, r load =5 ? ) v out 500mv/div v in 1v/div v refen 1v/div i out 200ma/div v out 500mv/div v in 1v/div v refen 1v/div i out 200ma/div time 100 s /div time 500 m s /div v out 500mv/div v in 1v/div v cntl 2v/div i out 200ma/div v out 500mv/div v in 1v/div v cntl 2v/div i out 200ma/div time 100 s /div time 100 s /div
ap 2303 document number: ds 36546 rev. 3 - 2 9 of 15 www.diodes.com september 2014 ? diodes incorporated ap2303 a product line of diodes incorporated new product application information 1. input capacitor the input capacitor of vin should be placed to vin pin as close as possible. use a low esr, 10f or larger mlcc capacitor to provide surge current during load transient. the input capacitor for vcntl is recommended to be 0.47f or larger to decoupl e the supply voltage of ap2303s control circuitry. 2. output capacitor the output capacito r is recommended with a 10 f or higher mlcc capacitor which will be sufficient at full temperature range. an aluminum electrolytic capacitor with low esr also should be larger than 10f. the output capacitor should be placed to vout pin as clo se as possibl e. 3. reference voltage a reference voltage is applied to the vrefen pin by a resistor divider between vin and gnd pins. and a 0.1f to 1f bypass ca pacitor is preferred to form a low - pass filter to reduce the noise from vin. more capacitance and large resistance will increase the start - up time after vin power - up. 4. thermal consideration theres an internal thermal protection circuitry of ap2303 to protect device during overload conditions. for continuous opera tion, make sure not to exceed the operatin g junction temperature range of + 125c. the power dissipation definition in device is: p d =(v in - v out )xi out + v in xi q the maximum power dissipation depends on the thermal resistance of ic package, pcb layout and the surrounding airflow. the ma ximum power dissipation can also be calculated as: p d(max) = (t j(max) - t a )/ ja the maximum power dissipation for psop - 8 package at t a = + 25c can be calculated as: p d(max) = (125c - 25c) / (80c/w) = 1.25w
ap 2303 document number: ds 36546 rev. 3 - 2 10 of 15 www.diodes.com september 2014 ? diodes incorporated ap2303 a product line of diodes incorporated new product ordering information package temperature range part number marking id packing soic - 8 - 40 to +85 ? c ap2303mtr - g1 2303m - g1 4000/ tape & reel psop - 8 ap2303mptr - g1 2303mp - g1 4000/ tape & reel marking information ( 1 ) soic - 8 (top view) ( 2 ) psop - 8 (top view) first and s econd l ines: logo and marking id third l ine: date code y: y ear ww: w ork w eek of m olding a: a ssembly h ouse c ode xx: 7 th and8 th d igits of batch no . 2303 m - g1 ywwaxx 2303 m p - g1 ywwaxx first and s econd l ines: logo and marking id third l ine: date code y: y ear ww: w ork w eek of m olding a: a ssembly h ouse c ode xx: 7 th and 8 th d igits of batch no . a p 2 3 0 3 x x x x C p a c k i n g p a c k a g e p r o d u c t n a m e t r : t a p e & r e e l m : s o i c - 8 g 1 : g r e e n r o h s / g r e e n m p : p s o p - 8
ap 2303 document number: ds 36546 rev. 3 - 2 11 of 15 www.diodes.com september 2014 ? diodes incorporated ap2303 a product line of diodes incorporated new product package outline dimensions (all dimensions in mm (inch) .) (1) package type: soic - 8 0 8 1 7 r 0 . 1 5 0 ( 0 . 0 0 6 ) r 0 . 1 5 0 ( 0 . 0 0 6 ) 1 . 0 0 0 ( 0 . 0 3 9 ) 0 . 3 0 0 ( 0 . 0 1 2 ) 0 . 5 1 0 ( 0 . 0 2 0 ) 1 . 3 5 0 ( 0 . 0 5 3 ) 1 . 7 5 0 ( 0 . 0 6 9 ) 0 . 1 0 0 ( 0 . 0 0 4 ) 0 . 3 0 0 ( 0 . 0 1 2 ) 3 . 8 0 0 ( 0 . 1 5 0 ) 4 . 0 0 0 ( 0 . 1 5 7 ) 7 7 2 0 : 1 d 1 . 2 7 0 ( 0 . 0 5 0 ) t y p 0 . 1 5 0 ( 0 . 0 0 6 ) 0 . 2 5 0 ( 0 . 0 1 0 ) 8 d 5 . 8 0 0 ( 0 . 2 2 8 ) 6 . 2 0 0 ( 0 . 2 4 4 ) 0 . 6 0 0 ( 0 . 0 2 4 ) 0 . 7 2 5 ( 0 . 0 2 9 ) 0 . 3 2 0 ( 0 . 0 1 3 ) 8 0 . 4 5 0 ( 0 . 0 1 7 ) 0 . 8 2 0 ( 0 . 0 3 2 ) 4 . 7 0 0 ( 0 . 1 8 5 ) 5 . 1 0 0 ( 0 . 2 0 1 ) n o t e : e j e c t h o l e , o r i e n t e d h o l e a n d m o l d m a r k i s o p t i o n a l . o p t i o n 1 o p t i o n 1 o p t i o n 2 0 . 3 5 0 ( 0 . 0 1 4 ) t y p t y p t y p 9 ~ 9 ~
ap 2303 document number: ds 36546 rev. 3 - 2 12 of 15 www.diodes.com september 2014 ? diodes incorporated ap2303 a product line of diodes incorporated new product package outline dimensions ( cont. all dimensions in mm (inch) .) (2) package type: psop - 8 8 5 . 8 0 0 ( 0 . 2 2 8 ) 6 . 2 0 0 ( 0 . 2 4 4 ) 1 . 2 7 0 ( 0 . 0 5 0 ) 0 . 4 0 0 ( 0 . 0 1 6 ) 3 . 8 0 0 ( 0 . 1 5 0 ) 4 . 0 0 0 ( 0 . 1 5 7 ) 0 . 5 1 0 ( 0 . 0 2 0 ) 0 . 0 5 0 ( 0 . 0 0 2 ) 0 . 1 5 0 ( 0 . 0 0 6 ) 4 . 7 0 0 ( 0 . 1 8 5 ) 1 . 2 7 0 ( 0 . 0 5 0 ) t y p 0 0 . 2 5 0 ( 0 . 0 1 0 ) 0 . 1 5 0 ( 0 . 0 0 6 ) 1 . 3 5 0 ( 0 . 0 5 3 ) 1 . 5 5 0 ( 0 . 0 6 1 ) 2 . 1 1 0 ( 0 . 0 8 3 ) 2 . 7 1 0 ( 0 . 1 0 7 ) 2 . 7 5 0 ( 0 . 1 0 8 ) 3 . 4 0 2 ( 0 . 1 3 4 ) 5 . 1 0 0 ( 0 . 2 0 1 ) n o t e : e j e c t h o l e , o r i e n t e d h o l e a n d m o l d m a r k i s o p t i o n a l . 0 . 3 0 0 ( 0 . 0 1 2 )
ap 2303 document number: ds 36546 rev. 3 - 2 13 of 15 www.diodes.com september 2014 ? diodes incorporated ap2303 a product line of diodes incorporated new product suggested pad layout (1) package type: soic - 8 dimensions z (mm)/(inch) g (mm)/(inch) x (mm)/(inch) y (mm)/(inch) e (mm)/(inch) value 6.900/0.272 3.900/0.154 0.650/0.026 1.500/0.059 1.270/0.050 g r i d p l a c e m e n t c o u r t y a r d z g y e x
ap 2303 document number: ds 36546 rev. 3 - 2 14 of 15 www.diodes.com september 2014 ? diodes incorporated ap2303 a product line of diodes incorporated new product suggested pad layout (cont.) (2) package type: psop - 8 dimensions z (mm)/(inch) g (mm)/(inch) x (mm)/(inch) y (mm)/(inch) x1 (mm)/(inch) y1 (mm)/(inch) e (mm)/(inch) value 6.900/0.272 3.900/0.154 0.650/0.026 1.500/0.059 3.600/0.142 2.700/0.106 1.270/0.050 g e x x 1 y y 1 z
ap 2303 document number: ds 36546 rev. 3 - 2 15 of 15 www.diodes.com september 2014 ? diodes incorporated ap2303 a product line of diodes incorporated new product important notice diodes incorporated makes no warranty of any kind, express or implied, with regards to this document, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose (and their equivalents under the laws of any jurisdiction). diodes incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. diodes incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does diodes incorporated convey any license unde r its patent or trademark rights, nor the rights of others. any customer or user of t his document or products described herein in such applications shall assume all risks of such use and will agree to hold diodes incorporated and all the companies whose products are represented on diod es incorporated website, harmless against all damages. diodes incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthor ized sales channel. should customers purchase or use diodes incorporated products for any unintended or unauthorized application , customers shall indemnify and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising ou t of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. products described herein may be covered by one or more united states, international or foreign patents pending. product nam es and markings noted herein may also be covered by one or more united states, international or fore ign trademarks. this document is written in english but may be translated into multiple languages for reference. only the english version of this document is the final and determinative format released by diodes incorporated. life support diodes incorporated products are specifically not authorized for use as critical components in life support devices or systems witho ut the express written approval of the chief executive officer of diodes incorporated. as used herein: a. life support devices o r systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided i n the labeling can be reasonably expe cted to result in significant injury to the user. b. a critical component is any component in a life support device or system whose failure to perform can be reasonably expe cted to cause the failure of the life support device or to affect its safety or effectiveness. customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support d evices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory a nd safety - related requirements concerning their products and any use of diodes incorporated products in such safety - critical, life support devices or systems, notwithstanding any devices - or systems - related information or support that may be provided by di odes incorporated. further, customers must fully indemnify diodes incorporated and its representatives against any damages arising out of the use of diodes incorporated products in such safety - critical, life support devices or systems. copyright ? 201 4 , diodes incorporated www.diodes.com

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