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delphi dnt04, non-isolated poi n t of load dc/dc pow e r modules: 2.4~5. 5 v in, 0.75~3.3v o, 3a out the delphi serie s dnt 04, 2.4-5.5v in p u t, single out put, non -isolated point of load dc/ dc co nverters are t he latest of fering from a worl d leade r in po wer system s technolo g y and manuf acturi ng delt a electro n ics, inc. the dnt 04 seri es provides a pro g ramm able o u tpu t volt age from 0.75v to 3.3v using exte rn al resi sto r s. t h is produ ct family is available in surfa c e mou n t or sip p a ckag e and pro v ides up to 3a o f output cu rre n t in an industry st anda rd footprint. with cre a tive design techn o logy and optimizati on of com pon ent placem en t, these conv erters posse ss out st andin g elect r ical a nd the r mal pe rform ance, as wel l as extremely high reliability unde r highly stressful op erating con d itions. the dnt04, 3a module s have excelle nt thermal performa n ce an d can provide full o u tput cu rrent at up to 8 5 ambient tem peratu r e with no airflo w . optio n s negative on/ o f f logic smd or sip p a ckage applica t i o ns t e lecom/dat a co m distributed po w e r architectures servers and w o r kst ations lan/w a n applications dat a processing applications featur es high ef ficiency : 94%@ 5v in, 3.3 v /3a out small size and low p r ofile: 0.80? x 0.45 ? x 0. 27? (smd ) 0.90? x 0.40 ? x 0. 25? (sip) s t andard footp r in t and pinout resistor-based tr im output volt age pr ogrammable f r o m 0.75v to 3.3v via exter nal resistor s pre-bias st artup no minimum load required fixed f r equenc y operation input uvl o , out put otp , ocp r e m o t e o n /o ff iso 9001, t l 90 00, iso 14 001, qs 9000, ohsas 1800 1 certified manufact u ring facility ul/cul 60950 ( u s & canada ) r e cognized, and tuv (en 609 50)- pe nding ce mark meet s 7 3 /23/eec and 93 /68/eec- pending prelimin a r y d a t a s h ee t ds_dnt0 4 sm d03 _01 18 20 0 7
ds_dnt 04s md3a_ 0 1 182 007 2 technical specifica t i o ns (t a = 25 c, airfl o w rate = 300 lf m, v in = 2.4vdc and 5.5v dc, n o m inal v o u t u n le ss ot her w ise no ted.) p a ramete r notes an d co nditio n s dnt 04s0a0 s 03nf a m i n . t y p . max . unit s absolute ma ximum ra tings inpu t v o lt ag e (con ti nuous) 0 5.8 vdc operati ng t e mpera t ure refer to figure 34 for mea s uring poin t -40 125 c s t orage t e mperatu r e -55 125 c i n put characteri s ti cs operati ng inpu t v o l t age vo Q vi n ? 0.5 v 2.4 5.5 v inpu t under -v ol t a g e lo cko ut t u rn-on v o l t age th reshold 1.95 2.05 2.15 v t u rn-o f f v o lt age th reshold 1.8 1.9 2.0 v max i mu m i npu t current v i n=4.5v v o =3 .3 v , io=io , max 2.4 a no-load inpu t curr ent 15 25 ma of f conv erter inpu t current 0.2 0.5 m a inru sh t r an sient v i n=2.4v to 5 . 5v , io=io,min to io,max 0.1 a 2 s recommended ino u t fu se tbd a output charac t eri s ti cs outpu t v o lt age set point v i n=5v , io= i o, max -1.5 vo , s e t +1. 5 % v o ,se t outpu t v o lt age adj u st able range 0.7525 3.63 v outpu t v o lt age reg u lation ov er line v i n=2 . 4v to 5 . 5v 0.2 % v o ,se t ov er load io= i o , m i n to io ,m a x 0.2 % v o ,se t ov er t e mperature t a =-40 to 85 0.4 % v o ,se t t o t a l ou tpu t v o lt ag e range ov er sample lo ad, l i ne and temperatur e -3.0 +3. 0 % v o ,se t outpu t v o lt age rip p le and noise 5hz to 20mhz ban dw id th peak- t o-pe ak full load , 1f cer a mic, 10f t a nt alum 30 50 mv rms full load , 1f cer a mic, 10f t a nt alum 10 15 mv outpu t cur r ent ran ge 0 3 a outpu t v o lt age ov e r-shoo t at s t ar t-up 5 % v o ,se t outpu t dc cur r ent- l imit in ception 200 % io outpu t shor t-circu i t curre nt (hiccup m ode) i o ,s/ c 1.5 adc (rms) dynami c chara cteri s ti cs dy namic load response 10f t an & 1f ce ramic load cap , 2.5 a /s posi tiv e s t ep chan ge in ou tput curre nt 50% io, max to 100 % io, max 180 mv negativ e s t ep cha nge in ou tpu t curr ent 100% io , max to 50 % io, max 180 mv setting t i me to 10 % o f pe ak dev i t a tio n 50 s t u rn-on t r an sien t io= i o . m a x s t art-up t i me, fro m on/of f con t rol v on/of f, v o =10% of v o ,set 7 ms s t art-u p t i m e , f r o m inpu t v i n = v i n , m i n, v o = 1 0% of v o ,s et 7 ms max i mu m outpu t s t artup cap a ci tiv e l oad full load ; e s r R 1m ? 1 0 0 0 f full load ; e s r R 10 m ? 3000 f effi ci ency vo = 3 . 3 v v i n=5v , 100% load 94.0 % v o =2.5 v v i n=5v , 100% load 92.0 % vo = 1 . 8 v v i n=5v , 100% load 90.5 % v o =1.5 v v i n=5v , 100% load 89.0 % vo = 1 . 2 v v i n=5v , 100% load 86.5 % v o =0.7 5v v i n=5v , 100% load 80.0 % fea t ure chara cteri s ti cs sw itching freq uen cy 250 300 350 kh z on/off control, ( n egativ e logic) logic low v o lt a g e module on , v o n / o f f -0.2 0.3 v logic high v o lt age module o f f, v o n/o f f 2.5 v i n.max v logic low current module on , ion / o f f 10 a logic high cur r ent module o f f, ion / o f f 0.2 1 ma general specif ica t ions mtbf io=100% of io, max ; t a =25 c tbd m hour s w e igh t 2 . 3 g r a m s
ds_dnt 04s md3a_ 0 1 182 007 3 electri cal characteristi cs cur ves figure 1 : converter ef ficie n c y vs. out put current (5v i n/3.3v out) figure 2 : converter ef ficie n c y vs. out put current (5v i n/2.5v out) figure 3 : converter ef ficie n c y vs. output current (5v i n/1.8v out) figure 4 : converter ef ficie n c y vs. output current (5v i n/1.5v out) figure 5 : converter ef ficie n c y vs. output current (5v i n/1.2v out) figure 6 : converter ef ficie n c y vs. out put current (5v i n/0.75 v out)
ds_dnt 04s md3a_ 0 1 182 007 4 electri cal characteristi cs cur ves (con.) figure 7 : outp ut rippl e & nois e at 5v in, 3.3v/ 3 a out figure 8 : outp ut rippl e & nois e at 5v in, 2.5v/ 3 a out figure 9 : outp ut rippl e & nois e at 5v in, 1.8v/ 3 a out figure 1 0 : output ripp le & no i s e at 5v in, 1.5 v /3a out figure 1 1 : t u rn on de lay ti me at 3.3v in, 1.2v /3a out figure 1 2 : t u rn on de lay ti me at 5v in, 0.75v/ 3 a out
ds_dnt 04s md3a_ 0 1 182 007 5 electri cal characteristi cs cur ves (con.) figure 1 3 : t u rn on de lay ti me at 5v in, 3.3v/3 a out figure 1 4 : t u rn on de lay ti me at 5v in, 2.5v/3 a out figure 1 5 : t u rn on de lay ti me at 5vin, 1.8v/3a out figure 1 6 : t u rn on de lay ti me at 5vin, 1.5v/3a out figure 1 7 : t u rn on de lay ti me at 5vin, 1.2v/3a out figure 1 8 : t u rn on de lay ti me at 5vin, 0.75v /3a out
ds_dnt 04s md3a_ 0 1 182 007 6 electri cal characteristi cs cur ves figure 1 9 : t y p i cal trans ient re spons e to step loa d cha nge at 2.5a/s from 1 00% to 50 % of io, max at 5v i n , 3.3v out (cout = 1uf ce ramic, 10f t a nt alu m ) figure 2 0 : t y p i cal trans ient re spons e to step loa d cha nge at 2.5a/s from 5 0 % to 100 % of io, max at 5v i n , 3.3v out (cout = 1uf cer a mic, 10f t a n t alu m ) figure 2 1 : output short circuit current 5v i n , 0.75v o u t figure 2 2 : t u rn on w i th prebia s 5vin, 3.3v/0 a out, vbias = 1 .0vdc vbias=1v
ds_dnt 04s md3a_ 0 1 182 007 7 design considerations input source impedance to maintai n l o w n o ise an d ripple at the input voltage, it is critical to use low esr cap a cito rs at the input to the module. figu re 26 sho w s the input rippl e voltage (mvp-p ) for variou s output mode ls usin g 2x100 f low esr tantalum capa citor (kemet p/n: t491d1 07m01 6as, avx p/n: tajd107m 106r, or equi valent) in parallel with 47 f cer a mi c ca pacit o r (tdk p/n:c5 7 50x7r1c476 m o r equivalent ). figure 27 sh ows much lower in put voltage ripple whe n input ca pa cita nce i s increa sed to 40 0 f (4 x 100 f) tantalum capa citors in pa rallel with 94 f (2 x 47 f) ce rami c c apa cit o r. the input cap a citan c e sho u ld be abl e to handle a n ac ripple cu rre nt of at least: arms vin vout vin vout iout irms ? ? ? ? ? ? ? = 1 20 28 36 44 52 60 01 23 out p ut vo l t a g e ( vd c ) i n pu t ri pp le vo lt a g e (m v p -p ) 4 figure 2 6 : input voltage ri pp l e for various o u tput mode ls, io = 3a (cin = 2 f tantal u m // 47 f ceramic) 20 24 28 32 36 40 012 34 o u tp ut v o ltag e (v d c ) i n pu t rip p le v o lta g e (mv p -p) figure 2 7 : input voltage ri pp l e for various o u tput mode ls, io = 3a (cin = 4 f tantal u m // 2 f cer a m i c) test configura t ions v i (+) v i (-) battery 2 100uf tantalum l to oscilloscope note: input reflected-r i pp le cu rrent is measur ed w i t h a simulat ed so ur ce in duct anc e. cu rrent is mea s ured at the i n put of the modul e. figure 2 3 : input reflected-ri p p le test setup vo gnd copper strip 10uf tantalum 1uf ceramic scope resistive load note: use a 10 f t ant alu m and 1 f cap a cit o r . scope measur ement shou ld b e mad e usin g a bnc conn ector . figure 2 4 : peak-pe a k outp u t noise a nd st artup transi ent me asur e m ent test setup. supply i i v i vo gnd io load contact and distribution losses contact resistance figure 2 5 : output volt ag e a nd ef fic i ency me asur e m ent test setup note: all measureme n t s are t a k en at the modu le termin a ls. w hen the m o dul e is n o t sol dere d (via s o c k et), plac e kelvi n con nec tions at mo d u le termi na ls to avoi d measur ement errors du e to cont act resist an ce. % 100 ) ( = ii vi io vo
ds_dnt 04s md3a_ 0 1 182 007 8 vo on/ o f f vi n gn d q1 rl rpull- up i on/of f figure 2 9 : negative re mote on/of f imple m ent atio n over-current protection t o provide prote c tion in an outp u t over loa d fa ult con d ition, the unit is equi p ped with i n ternal over-current prote c tion. whe n the over-curre nt prote c tio n is trigge red, th e unit enters hiccu p m ode. the u n it s operate no rm ally once the fault conditio n is rem o ved. design considera t ions (con.) the po we r module sh ou ld be conn e c ted to a lo w ac-i mpe dan ce input sou r ce. hi ghly i ndu ctive so u r ce impeda nces can af fe ct the st ability of the module. an input cap a cit ance must be placed clo s e to the modules input pin s to filter ripple curre n t and ensure m odu le st ability in the presen ce o f inductive trace s that su pply the input volt age to the mo dule. safet y considerations for safety-ag ency app rova l the power module mu st be inst all ed in complian c e wit h the sp a c ing and sep a rati on requi rem ent s of the end-u s e safety agen cy st an da rds. for the co nverter outp u t to be con s id e r ed meetin g the requi rem ent s of safety extra-lo w volt age (sel v), the input must m eet sel v req u irem ent s. the power mod u le has extra-lo w volt age (e l v ) output s whe n all input s are el v . the input to these unit s is to be provided with a adeq uate time-del ay fuse i n the ungrou nded le ad. fea t ures descriptions remote on/of f the dnt se ri es p o we r mo dule s have a n on/of f pin for remote o n /o f f operation. both positive and ne gati v e on/off logic option s are available in the dnt se ri es power mo dul es. for p o sitive logic modul e , conn ect an open coll ector (np n ) tra n si stor o r op en drain (n ch annel ) mos f et betwe en the on/of f pin and the gnd pi n (se e figure 28). positive logi c on/off sign a l turns th e m odule on d u ring the logi c high and turns th e module off durin g the lo g i c low. wh en th e positive on/ o f f function is not used, le a v e the pin floatin g or tie to v i n (modul e will be on). for negative logic mod u le, the on/off p i n is pulled high with an external pull-u p re sisto r (see figure 29 ). neg a tive logic on/off signal turns th e modul e of f duri ng logi c high and turn s the module on durin g logic l o w. if the negative on/of f function is not u s e d , leave the pin floating or tie to gnd. (modul e will be on) vo on / o ff vi n gn d q1 rl i on/ o ff figure 2 8 : positive rem o te on/of f im plem ent a tion
ds_dnt 04s md3a_ 0 1 182 007 9 fea t ures descriptions (con.) over-t emperature protection the over-tem peratu r e p r ot ection con s i s ts of circuitry that provide s protection fro m thermal damag e. if the temperature excee d s the ove r-tem pe ra ture thre sh old the module will shut down. th e module will try to restart after shutdown. if the over-tem perature condition still exi s t s durin g re start, the module will shut d o wn ag ain. this resta r t trial will continue u n til the temp eratu r e is wit h in specification. o u t p u t v o l t a g e p r o g r a m m i n g the output vo lt age of the dnt ca n be p r ogra mmed to any volt age between 0.75vd c and 3. 3vd c by conne cting on e resi sto r (s ho wn a s rtrim i n figure 30) betwe en the trim and g n d pi ns of th e module. wit hout this ex ternal resi sto r , the output volt ag e of the mod u le is 0.7525 vdc. t o calcul ate the value of th e re si stor rtri m for a p a rticular output volt ag e v o , please use the follo wing equ ation: ? ? ? ? ? ? ? ? ? = 5110 7525 . 0 21070 vo rtrim for exa m ple, to pro g ra m the outp u t volt age of the dns module to 1.8 v dc, rtrim i s cal c ulate d as follows: ? = ? ? ? ? ? ? ? ? ? = k rtrim 15 5110 7525 . 0 8 . 1 21070 dnt can al so be prog ram m ed by apply a volt age betwee n the trim and gnd pins (figu r e 3 1 ). the following equatio n ca n be used to determi ne the value of vtrim need ed for a desi r ed o u tpu t volt age v o : () 7525 . 0 1698 . 0 7 . 0 ? ? = vo vtrim for example, to program the output volt age of a dnt module to 3.3 vdc, vtrim is calculated a s follows () v vtrim 267 . 0 7525 . 0 3 . 3 1698 . 0 7 . 0 = ? ? = vo tr i m gnd rlo a d rt ri m figure 3 0 : circuit config urati on for progr a m mi ng o u tput vol t age usin g an exter nal res i stor fea t ure descriptions (con.) figure 3 2 : circuit config urati on for outp u t voltag e margi n i ng vo on / o ff vi n gn d trim q2 q1 rma r gin- up rma r gin- do wn rtr i m vo tr im gnd rl oa d vt r i m + _ figure 3 1 : circuit confi gurati on for progr a m mi ng o u tput vol t age usin g extern al volt ag e source the amou nt of power d e livered by the modul e is the volt age at th e output terminals m u ltip lied b y the output curre n t. whe n usin g the trim feature, the output volt a ge of the module can be increa sed, whi c h a t the same output curre n t woul d incre a se the power ou tput of the module. care sh ould be t a ke n to ensu r e that the maximum output power of the module m u st not excee d th e maximum rated power ( v o .set x io.max p m a x ) . v o lt age margining output volt ag e marginin g can be impl e m ented in th e dnt module s by conne cting a resi stor , r m a rgin -u p , from the t r im pin to the ground pin for margi n ing - up the output volt ag e and by con n ecting a resi stor , r ma rgin -d o w n , from the t r im pin to the output pin for m a rgi n ing-do wn. fi gure 32 sho w s the circuit configu r ation for outp u t volt age ma rginin g. if unused , leave the tri m pin un co nne cted. a cal c ulatio n tool is available fro m the evaluati on procedu re which com putes the values of r m a rgin -u p an d r ma rgin -d o w n for a spe c ific output volt age an d margi n perce nt age.
ds_dnt 04s md3a_ 0 1 182 007 10 thermal consi d era t i o ns therm a l man ageme n t is a n importa nt part of the syst em desi gn. to e n su re p r op er, reliabl e ope ration, suffici e n t cooli ng of th e po we r mod u le is nee de d over th e e n tire temperature range of the modul e. co n v ection co olin g is usu a lly the dominant mo d e of heat tran sfer. hen c e, the choi ce of eq uipment to chara c te rize the thermal p e rf orma nce of the po wer m odule i s a wind tunnel. thermal t esting setup delta? s dc/ dc po we r module s are chara c te rize d in heated verti c al wind tunn els t hat simu late the thermal environ ment s encou ntered in most electroni cs equipm ent. this type of equipm ent comm only u s e s vertically mou n ted circuit card s in cabi n e t rac ks in w h ich the power mo dule s are m o unted. the followi ng figure sho w s t he wind t unnel cha r a c teri zati on setup. the power mod u l e is mounted on a test pwb and is verti c ally positione d within the wind tunnel. the h e ight of this f an du ct is co nst a ntly kept at 25.4mm (1? ? ). thermal derating heat can b e remove d by increa sing airflow over the module. t o enha nce system reli abi lity, the powe r module sho u l d alway s be operated bel o w the maxim u m operating te mperature. if the tempera t ure exce ed s the maximum module temperat ure, reli ability of the unit may be affected. n o t e : w i nd tun ne l t e s t s e t u p fi g u r e d i m e ns i ons a r e in m i l l im e t e r s a n d ( i n c h mo dul e a ir fl o w 12. 7 (0. 5 ?) 50. 8 ( 2. 0? ) fa c i ng p w b pw b ai r vel o c i t y an d a m b i en t t e mp er at ure m e a s ured be l o w t h e m o dul e 25. 4 (1. 0 ?) figure 3 3 : w i nd tunne l test setup thermal cur ves figure 3 4 : t e mp eratur e mea s ure m e n t locati on t he all o w ed maxi mu m h o t spot temp erature is defin ed at 12 5 d n t 04s 0a0 s 03( st andar d) o u t put c u r r ent vs. am bi e n t te m per a t ur e and a i r v e l o ci t y @v i n = 5 v , v o= 0. 75v~ 3 . 3 v ( e i t her o r i ent at i o n ) 0. 0 0. 5 1. 0 1. 5 2. 0 2. 5 3. 0 3. 5 2 5 30 3 5 40 4 5 5 0 55 60 65 7 0 7 5 80 85 na t u r a l c o nvect i on a m b i en t t e m p er at ur e ( ) o u tp u t c u r r e n t ( a ) figure 3 5 : derating curv es, output current v s . ambi ent temp eratur e an d air vel o city @ v i n= 5v , v o u t = 0 .75v~ 3 .3v(either orient atio n)
ds_dnt 04s md3a_ 0 1 182 007 11 pick and place lo ca tion surf ace- mount t a pe & reel lead (sn/pb) process re com m end tem p . profile ti m e ( s e c . ) p r e- heat t e m p . 14 0~1 8 0 c 6 0 ~ 120 s e c. p eak t e m p . 21 0~2 3 0 c 5s ec. ra mp -u p te mp. 0.5~ 3.0 c / s ec. t e mper atur e ( c ) 50 10 0 15 0 200 25 0 30 0 60 0 12 0 180 240 2n d ra mp -u p te mp . 1.0 ~ 3. 0 c / s ec. o v e r 200 c 4 0 ~ 50s ec . coo ling d o w n r a te < 3 c / s ec. lead free (sac) pro c ess re commend temp . profile temp . ti m e 150 20 0 90~ 120 s e c. t i m e l i m i t e d 75 s e c. ab o v e 2 2 0 22 0 pr e h e a t t i m e ra m p u p ma x . 3 /s e c . ra m p d o w n ma x . 4 /s e c . p e a k t e m p . 240 ~ 245 25
ds_dnt 04s md3a_ 0 1 182 007 12 mechanical dra w ing smd p a ckage sip p a ckage (optional)
ds_dnt04smd3a_01182007 13 part numbering system dnt 04 s 0a0 s 03 n f a product series input voltage numbers of outputs output voltage package type output current on/off logic option code dnt- 3a/5a 04 - 2.4v~5.5v s - single 0a0 - programmable r - sip s - smd 03 - 3a n- negative p- positive f- rohs 6/6 (lead free) a - standard function model list model name package input voltage output voltage output current efficiency 5vin, 3.3vdc full load DNT04S0A0S03NFA smd 2.4v ~ 5.5vdc 0.75v ~ 3.3vdc 3a 94% dnt04s0a0r03nfa sip 2.4v ~ 5.5vdc 0.75v ~ 3.3vdc 3a 94% dnt04s0a0s05nfa smd 2.4v ~ 5.5vdc 0.75v ~ 3.3vdc 5a 94% dnt04s0a0r05nfa sip 2.4v ~ 5.5vdc 0.75v ~ 3.3vdc 5a 94% contact: www.delta.com.tw/dc d c usa: telephone: east coast: (888) 335 8201 west coast: (888) 335 8208 fax: (978) 656 3964 email: dcdc@delta-corp.com europe: telephone: +41 31 998 53 11 fax: +41 31 998 53 53 email: dcdc@delta-es.tw asia & the rest of world: telephone: +886 3 4526107 x6220 fax: +886 3 4513485 email: dcdc@delta.com.tw warranty delta offers a two (2) year limited warranty. complete warranty information is listed on our web site or is available upon request from delta. information furnished by delta is believed to be accurate and reliable. however, no responsibility is assumed by delta for its use, nor for any infringements of patents or other rights of third parties, which may result from its use. no license is granted by implication or otherwise under any patent or pat ent rights of delta. delta reserves the right to revise these specifications at any time, without notice .

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