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datasheet d s _ dnt 04 smd03 _ 07182012 features ? high efficiency: 9 3.0 % @ 5vin, 3.3v/ 3 a out ? small size and low profile: 0.80 x 0. 45 x 0. 27 (smd) 0.90 x 0. 4 0 x 0. 2 5 (sip) ? standard footprint and pinout ? r esistor - based trim ? output voltage programmable from 0.75v to 3 . 63 v via external resistors ? pre - bias startup ? no minimum load required ? fixed frequency operation ? input uvlo , ocp ? remote on/off ? iso 900 1 , tl 9000, iso 14001, qs 9000, oh sas 18001 certified manufacturing facility ? ul/cul 60950 (us & canada) recognized, and tuv (en60950) - pending ? ce mark meets 73/23/eec and 93/68/eec - pending applications ? telecom/datacom ? distributed power architectures ? ser vers and work stations ? lan/wan applications ? data processing application s options ? positive o n/of f logic ? sip package delphi dnt04 , non - isolated point of load dc/dc power modules: 2.4 ~ 5.5 v in , 0.75~3.6 3 v o , 3 a out the delphi series dn t 04 , 2.4 - 5.5v input , single output , non - isolated point of load dc/dc converters are the latest offering from a world leader in power systems technology and manufacturing d elta electronics, inc. the dnt 04 series provides a programmable output voltage from 0.75v to 3.63v usi ng external resistors . this product family is available in surface mount or sip package and provides up to 3 a of output current in an industry standard footprint. with c reative design technology and optimization of component placement , these converters pos sess outstanding electrical and thermal performance, as well as extremely high reliability under highly stressful operating conditions. the dnt04, 3a modules have excellent thermal performance and can provide full output current at up to 85 ambient temper ature with no airflow.
ds_dnt04smd 03 _ 07182012 2 technical specificat ions ( t a = 25c, airflow rate = 300 lfm, v in = 5 vdc, nom inal vout unless other wise noted.) parameter notes and conditions dn t 04s0a0 s03nfa min. typ. max. units absolute maximum ratings input voltage (continuous) 0 5.8 vdc operating temperature - 40 85 c storage temperature - 55 125 c input characteristics ope rating input voltage vo Q vin C 0.5v 2. 4 5.5 v input under - voltage lockout turn - on voltage threshold 2.05 v turn - off voltage threshold 1.9 v maximum input current vin=4.5v , vo=3.3v, io= 3a 2. 5 a no - load input current 20 30 ma off converter input current 1 m a inrush transient vin= 2. 4 v to 5.5v, io=io, min to io, max 0.1 a 2 s recommended inout fuse tbd a output characteristics output voltage set point vin=5v, io=io, max - 2. 5 vo,set +2. 5 % vo,set output voltage adjustable range 0.7525 3.63 v o utput voltage regulation over line vin =2. 4 v t o 5.5v 0.2 % vo,set over load io=io,min to io,max 0.2 % vo,set over temperature ta= - 40 to 85 0.4 % vo,set total output voltage range over sample load, line and temperature - 3.0 +3.0 % vo,set output voltage ripple and noise 5hz to 20mhz bandwidth peak - to - peak full load, 1f ceramic, 10f tantalum 30 50 mv rms full load, 1f ce ramic, 10f tantalum 10 15 mv output current range 0 3 a output voltage over - shoot at start - up 1 % vo,set output dc current - limit inception 200 % io output short - circuit current (hiccup mode) io,s/c 1.6 adc (rms) dynamic characteristics dynamic load response 1 0f tan & 1f ceramic load cap, 2.5 a/s positive step change in output current 50% io , max to 100% io , max 220 mv negative step change in output current 100% io , max to 50% io , max 220 mv setting time to 1 0 % of peak de vitation 50 s turn - on transient io=io.max start - up time, from on/off control von/off, vo=10% of vo,set 7 ms start - up time, from input vin=vin,min, vo=10% of vo,set 7 ms maximum output startup capacitive load full load; esr R 1m 1000 f full load; esr R 10m 3000 f efficiency vo=3.3v vin=5v, 100% load 93.0 % vo=2.5v vin=5v, 100% load 90.0 % vo=1.8v vin=5v, 100% load 87.0 % vo=1.5v vin=5v, 100% load 85.0 % vo=1.2v vin=5v, 100% load 83.0 % vo=0.75v vin=5v, 100% loa d 77.0 % feature characteristics switching frequency 300 khz on/off control, ( for negative logic) logic low voltage module on, von/off - 0.2 0.3 v logic high voltage module off, von/off 1.5 vin.max v logic low current module on, ion/ off 10 a logic high current module off, ion/off 0.2 1 m a on/off control, ( for positi ve logic) logic high voltage module on, von/off vin.max v logic low voltage module off, von/off - 0.2 0.3 v logic high current module on, ion/off 10 a logic low current module off, ion/off 0.2 1 m a general specifications mtbf io=100% of io, max; ta=25c 21.44 m hours weight 2.3 grams
ds_dnt04smd 03 _ 07182012 3 electrical character istics curves figure 1 : converter efficiency vs. output current (5vin/3.3vout) figure 2: converter efficiency vs. output current (5vin/2.5vout) figure 3 : converter efficiency vs. output current (5vin/ 1.8 vout) figure 4: converter efficiency vs. output current (5vin/1. 5 vout) figure 5: converter eff iciency vs. output current (5vin/ 1.2 vout) figure 6: converter efficiency vs. output current (5vin/ 0.75 vout) 90 91 92 93 94 95 96 0. 5 1 1. 5 2 2. 5 3 out put cur r ent ( a) efficiency (%) 84 86 88 90 92 94 96 0. 5 1 1. 5 2 2. 5 3 out put cur r ent ( a) efficiency (%) 82 84 86 88 90 92 0. 5 1 1. 5 2 2. 5 3 out put cur r ent ( a) efficiency (%) 80 82 84 86 88 90 92 0. 5 1 1. 5 2 2. 5 3 out put cur r ent ( a) efficiency (%) 78 80 82 84 86 88 90 0. 5 1 1. 5 2 2. 5 3 out put cur r ent ( a) efficiency (%) 74 76 78 80 82 84 86 0. 5 1 1. 5 2 2. 5 3 out put cur r ent ( a) efficiency (%)
ds_dnt04smd 03 _ 07182012 4 electrical character istics curves (con.) figure 7: output ripple & noise at 5vin, 3.3v/3a out figure 8: output ripple & noise at 5vin, 2. 5v/3a out figure 9: output ripple & noise at 5vin, 1.8v/3a out figure 10: output ripple & noise at 5vin, 1.5v/3a out figure 11: output ripple and noise at 5vin, 1.2v/3a out figure 12: output ripple and noise at 5vin, 0.75v/3a out
ds_dnt04smd 03 _ 07182012 5 electri cal characteristics curves (con.) figure 13: turn on delay time at 5vin, 3.3v/3a out top: vout, 2v/div ; bottom: vin , 5v/div. 2ms/div figure 14: turn on delay time at 5vin, 2.5v/3a out top: vout, 2v/div; bottom: vin, 5v/div,.2ms/div figure 15: turn on delay time at 5vin, 1.8v/3a out top: vout, 2v/div; bottom: vin, 5v/div. 2ms/div figure 16: turn on delay time at 5vin, 1.5v/3a ou t top: vout, 2v/div; bottom: vin , 5v/div. 2ms/div figure 17: turn on delay time at 5vin , 1.2v/3a out to p: vout, 2v/div; bottom: vin, 5v/div. 2ms/div figure 18: turn on delay time at 5vin , 0.75v/3a out top: vout, 2v/div; bottom: vin, 5v/div. 2ms/div
ds_dnt04smd 03 _ 07182012 6 electrical character istics curves figure 19: typical transient response to step load change at 2.5a/ s from 100% to 50% of io, max at 5vin, 3.3vout (cout = 1uf ceramic, 10f tantalum) figure 20: typical transient response to step load change at 2.5a/s from 50% to 100% of io, max at 5vin, 3.3vout (cout =1uf ceramic, 10f tantalum) figure 2 1: output short circuit current 5vin, 0.75vout 5a/div, 20ms/div figure 2 2: turn on with prebias : 5vin , 3.3v/0a out , vbias =1.0vdc top: vout , 2.5v/div, bottom :vin, 5v/div, vbias=1v
ds_dnt04smd 03 _ 07182012 7 test configurations note: input reflected - ripple current is measured with a simulated source inductance. current is measured at the input of the module. figure 2 3: input reflected - ripple test setup note: use a 10f tantalum and 1f capacitor. scope measurement should be made using a bnc connector. figure 2 4 : peak - peak output n oise and startup transient measurement test setup. figure 2 5: output voltage and efficiency measurement test setup note: all measurements are taken at the module terminals. when the module is not soldered (via socket), place kelvin connections at module terminals to avoid measurement errors due to contact resistance. design considerations input source impedance to maintain low noise and ripple at the input voltage, it is critical t o use low esr capacitors at the input to the module. the power module should be connected to a low ac - impedance input source. highly inductive source impedances can affect the stability of the module. an input capacitance must be placed close to the module s input pins to filter ripple current and ensure module stability in the presence of inductive traces that supply the input voltage to the module. safety considerations for safety - agency approval the power module must be installed in compliance with the spacing and separation requirements of the end - use safety agency standards. for the converter output to be considered meeting the requirements of safety extra - low voltage (selv), the input must meet selv requirements. the power module has extra - low voltag e (elv) outputs when all inputs are elv. the input to these units is to be provided with a n adequate time - delay fuse in the ungrounded lead. v i ( +) v i ( -) battery 2 100uf tantalum l vo gnd 10uf tantalum 1uf ceramic scope resistive load v i vo gnd % 100 ) ( ? ? ? ? ii vi io vo ?
ds_dnt04smd 03 _ 07182012 8 features description s (con.) output voltage programming the output voltage of the dnt can be p rogrammed to any voltage between 0.75vdc and 3.63vdc by connecting one resistor (shown as rtrim in figure 30 ) bet ween the trim and gnd pins of the module. without this external resistor, the output voltage of the module is 0.7525 vdc. to calculate the value of the resistor rtrim for a particular output voltage vo, please use the following equation: for example, to program the output voltage of the dn t module to 1.8vdc, rtrim is calculated as follows: dnt can also be programmed by apply a voltage between the trim and gnd pins (figure 31 ). the following equation can be used to determine the value of vtrim needed for a desired output voltage vo: for example, to program the output voltage of a dnt module to 3.3 vdc, vtrim is calculated as follows figure 28 : circuit configu ration for programming output voltage using an external resistor features description s remote on/off the dnt series power modules have an on/off pin for remote on/off operation. both positive and negative on/off logic options are available in the dn t series power modules . for positive logic module, connect an open collector (npn) transistor or open drain (n channel) mosfet between the on/off pin and the gnd pin (see figure 28). positive logic on/off signal turns the module on during the logic high a nd turns the module off during th e logic low. when the positive on/off function is not used, leave the pin floating or tie to vin (module will be on) . for negative logic module, the on/off pin is pulled high with an external pull - up resistor (see figure 2 9 ). negative logic on/off signal turns the module off during logic high and turns the module on during logic low. if the negative on/off function is not used, leave the pin floating or tie to gnd. (module will be on) figur e 26 : positive remote on/off imp lementation figu re 27 : ne gative remote on/off implementation over - current protection to provide protection in an output over load fault condition, the unit is equipped with internal over - current protection. when the over - current protection is trigger ed, the unit enters hiccup mode. the units operate normally once the fault condition is removed. ? ? ? ? ? ? ? ? ? ? 5110 7525 . 0 21070 vo rtrim ? ? ? ? ? ? ? ? ? ? ? ? k rtrim 15 5110 7525 . 0 8 . 1 21070 ? ? 7525 . 0 1698 . 0 7 . 0 ? ? ? ? vo vtrim ? ? v vtrim 267 . 0 7525 . 0 3 . 3 1698 . 0 7 . 0 ? ? ? ? ? vo trim gnd rload rtrim vo o n/o ff v in gnd q1 rl i o n /o f f vo on/off vin gnd q1 rl rpull- up i o n /o ff
ds_dnt04smd 03 _ 07182012 9 feature descriptions (con.) table 1 provides rtrim values required for some common output volta ges, while table 2 provides value of external voltage source , vtrim , f or the same common output voltages . by using a 1% tolerance trim resistor, set point tolerance of 2% can be achieved as specified in the electrical specification. table 1 v o (v) rtrim (k ) 0.7525 open 1.2 41.973 1.5 23.077 1.8 15.004 2.5 6 .947 3.3 3.160 3.63 2.212 table 2 vo (v) vtrim (v ) 0.7525 open 1.2 0.6240 1.5 0.5731 1.8 0.5221 2.5 0.4033 3.3 0.2674 3.63 0.2114 figure 29 : circuit configuration for programming output voltage using external voltage source the amount of power delivered by the module is the voltage at the output terminals multiplied by the output current. when using the trim feature, the output voltage of the module can be increased, which at the same o utput current would increase the power output of the module. care should be taken to ensure that the maximum output power of the module must not exceed the maximum rated power ( vo.set x io.max p max ) . voltage margining output voltage margining can be implemented in the dnt modules by connecting a resisto r, r margin - up , from the trim pin to the ground pin for margining - up the output voltage and by connecting a resistor, r margin - down , from the trim pin to the output pin for margining - down. figure 3 2 shows the circuit configuration for output v olta ge margini ng. if unused, leave the trim pin unconnected. a calculation tool is available from the evaluation procedure which computes the values of r margin - up and r margin - down for a specific output voltage and margin percentage . figure 30 : circuit configuration for output voltage margining vo trim gnd rload vtrim + _ vo on/off vin gnd trim q2 q1 rmargin-up rmargin-down rtrim
ds_dnt04smd 03 _ 07182012 10 thermal consideratio ns thermal management is an important part of the system design. to ensure proper, reliable operation, sufficient cooling of the power module is needed over the entire tem perature range of the module. convection cooling is usually the dominant mode of heat transfer. hence, the choice of equipment to characterize the thermal performance of the power module is a wind tunnel. thermal testing setup deltas dc/dc power module ). thermal derating heat can be removed by increasing airflow over the module. to enhance system reliability, the power module should always be operated below the maximum operating temperature. if the temperature exceeds the maximum module temperature, reliability of the unit may be affected. figure 31 : wind tunnel test setup thermal curves figure 3 2 : temperature measurement location the allowed maximum hot spot temperature is defined at 1 25 figure 33 : derating curves, o utput current vs. ambient temperature and air velocity @ vin=5v, vout=0.75v~3.3v(either orientation) air flow module pwb 50.8(2.00") air velocity and ambient temperature sured below the module fancing pwb note: wind tunnel test setup figure dimensions are in millimeters and (inches) dnt04s0a0s03(standard) output current vs. ambient temperature and air velocity @vin = 5v,vo=0.75v~3.3v (either orientation) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 25 30 35 40 45 50 55 60 65 70 75 80 85 natural convection ambient temperature ( ) output current (a)
ds_dnt04smd 03 _ 07182012 11 pick and place locat ion surface - mount tape & reel lead (sn/pb) process recommend te mp. profile lead free (sac) proc ess recommend temp. profile note: all temperature refer s to assembly application board, measured on the land of assembly application board. temp . time 150 200 90~120 sec. time limited 75 sec. above 220 220 preheat time ramp up max. 3 ramp down max. 4 peak temp. 240 ~ 245 25
ds_dnt04smd 03 _ 07182012 12 mec hanical drawing smd package sip package (optiona l)
ds_dnt04smd 03 _ 07182012 13 part numbering syste m 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 - 2.4 v ~5.5v s - single 0a 0 - programmable r - sip s - smd 03 - 3 a 05 - 5a n - negative p - positive f - rohs 6/6 (lead free) a - s tandard fun c tion model list model name package input voltage output voltage o utput current efficiency 5 vin, 3.3v dc full load dn t 04s0a0s0 3 n f a smd 2.4 v ~ 5.5 vdc 0.75v ~ 3. 6 3vdc 3 a 93.0% dn t 04s0a0r0 3 n f a sip 2.4 v ~ 5.5 vdc 0.75v ~ 3. 6 3vdc 3 a 94 .0 % dn t 04s0a0s0 5n f a smd 2.4 v ~ 5.5 vdc 0.75v ~ 3. 6 3vdc 5 a 93.5% dn t 04s0a0r0 5n f a sip 2.4 v ~ 5.5 vdc 0.75v ~ 3. 6 3vdc 5 a 93.0 % c ontact: www.deltaww.com/dcdc usa: telephone: east coast: 978 - 656 - 3993 west coast: 510 - 668 - 5100 fax: (978) 656 3964 email: dcdc@delta - corp.com europe: telephone: +31 - 20 - 655 - 0967 fax: +31 - 20 - 65 5 - 0999 email: dcdc@delta - es. com asia & the rest of world : telephone: +886 3 4526107 x6220 ~6224 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 patent rights of delta. delta reserves the right to revise these specifications at any time, without notice .

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