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the oki-t/36w-w40 are non-isolated point-of- load (pol) dc/dc power converters for embedded applications. the module is fully compatible with distributed-power open standards alliance (dosa) industry-standard speci? cations (www.dosapower .com). the wide input range is 19 to 40 volts dc. power output is 36 watts at vout = 12vdc. based on ? xed- frequency synchronous buck converter switching topology, the high power conversion ef? cient point of load (pol) module features an on/off control. these converters also include under voltage lock out (uvlo), output short circuit protection, over- current and over temperature protections. these units are designed to meet all standard ul/en/iec 60950-1 safety certi? cations and rohs- 6 hazardous substance compliance. product overview connection diagram figure 1. oki-t/36w-w40 note: murata power solutions strongly recommends an external input fuse, f1. see speci? cations. external dc power source f1 on/off control common common open = on closed = off +vin +vout trim controller reference and error ampli?er t4xjudijoh t'jmufst t$vssfou4fotf (positive on/off) features non-isolated smt pol dc/dc power module 19-40vdc input voltage range selectable output voltage 5.021-15.5vdc up to 3 amps output drives 1000 f ceramic capacitive loads high power conversion ef? ciency outstanding thermal derating performance over temperature and over current protection on/off control, positive or negative polarity ul/en/iec 60950-1 safety (pending) industry-standard (dosa) surface-mount package rohs-6 hazardous substance compliance typical unit contents page description, connection diagram, photograph 1 ordering guide, model numbering, product labeling 2 mechanical speci? cations, input/output pinout 3 detailed electrical speci? cations 4 output voltage adjustment, soldering guidelines 5 application notes 6 performance data and oscillograms 9 features typ ic mdc_oki-t/36w-w40.a02 p age 1 of 12 oki-t/36w-w40 series selectable output 36-watt dosa-smt dc/dc converters www.murata-ps.com for full details go to www.murata-ps.com/rohs $ www.murata-ps.com/support
part number structure ? dimensions are in inches (mm). ? remote on/off polarity is negative. ? all specifications are at nominal line voltage, vout = 5.021-15.5v and full load, +25 ?c. unless otherwise noted. output capacitors are 1 f ceramic and 10 f electrolytic in parallel. input cap is 22 f. see detailed specifications. i/o caps are necessary for our test equipment and may not be needed for your application. ? input current is shown at vout = 15v. ? efficiency is given at vout = 15v. ? ripple/noise is shown at vin = 24v, vout = 5.021v. ordering guide root model output input ef? ciency ? package v out (volts) i out (amps max) power (watts) r/n (mvp-p) ? regulation (max.) v in nom. (volts) range (volts) i in , ? no load (ma) i in , ? full load (amps) case c72 ? pinout max. line load min. typ. oki-t/36w-w40 p-c 5.021-15.5 3 36 50 0.3 0.25 24 19-40 80 1.58 93% 95% 0.47 x 0.82 x 0.34 (11.9 x 20.8 x 8.6) p78 oki-t/36w-w40 n-c 5.021-15.5 3 36 50 0.3 0.25 24 19-40 80 1.58 93% 95% 0.47 x 0.82 x 0.34 (11.9 x 20.8 x 8.6) p78 performance speci? cations and ordering guide product label because of the small size of these products, the product label contains a character-reduced code to indicate the model number and manufacturing date code. not all items on the label are always used. please note that the label dif- fers from the product photograph on page 1. here is the layout of the label: the label contains three rows of information: first row C murata power solutions logo second row C model number product code (see table) third row C manufacturing date code and revision level the manufacturing date code is four characters: first character C last digit of manufacturing year, example 200 9 second character C month code (1 through 9 and o through d) third character C day code (1 through 9 = 1 to 9, 10 = o and 11 through 31 = a through z) fourth character C manufacturing information figure 2. label artwork layout xxxxxx product code mfg. date code revision level ymdx rev. model number product code oki-t/36w-w40 p-c iw1136 oki-t/36w-w40 n-c iw0136 maximum rated output power in watts input voltage range 19-40v on/off polarity p = positive polarity n = negative polarity / w40 - 36w c - rohs hazardous substance compliance c = rohs-6 ( does not claim eu rohs exemption 7bClead in solder ) n note: some model number combinations may not be available. contact murata power solutions for availability. okami non-isolated pol surface mount trimmable output voltage range 5.021-15.5v ok i - t mdc_oki-t/36w-w40.a02 p age 2 of 12 oki-t/36w-w40 series selectable output 36-watt dosa-smt dc/dc converters www.murata-ps.com/support
mechanical specifications 0.010 17.52 0.690 4.57 0.180 8.64 0.340 12.69 0.500 0.340 0.25 8.64 0.07 1.8 5.64 ref 0.222 0.420 ref 10.67 3 2 1 bottom view 4 5 typ 0.090 2.29 1.59 0.063 typ 0.06 1.5 end view material: smt pins: copper alloy finish: (all pins) gold (5u"min) over nickel (50u" min) isometric view pin #1 recommended pad layout top view pin #1 this point pickup corner (farside) nozzle 0.47 11.9 0.82 20.8 side view [17.52] 0.690 [11.9] 0.47 ref [1.52] 0.060 ref [4.57] 0.180 [8.64] 0.340 [8.64] 0.340 [12.69] 0.500 [1.8] 0.070 ref [20.8] 0.82 ref [1.52] 0.06 ref [3.05] 0.120 min [3.43] 0.135 max [2.41] 0.095 min [2.79] 0.110 max 0.34 8.64 0.063 1.59 mtg plane input/output connections oki-t/36w-w40 pin function 1 on/off control* 2+v in 3 ground (common) 4 trim 5+v out *the remote on/off can be provided with either positive (p suf? x) or negative (n suf? x) polarity figure 2. oki-t/36w-w40 mechanical outline third angle projection dimensions are in inches (mm shown for ref. only). components are shown for reference only. tolerances (unless otherwise speci?ed): .xx 0.02 (0.5) .xxx 0.010 (0.25) angles 1? mdc_oki-t/36w-w40.a02 p age 3 of 12 oki-t/36w-w40 series selectable output 36-watt dosa-smt dc/dc converters www.murata-ps.com/support
performance and functional speci? cations see note 1 input input voltage range see ordering guide. isolation not isolated start-up voltage 18.4 v undervoltage shutdown (see note 15) 17 v min., 18.7v max. overvoltage shutdown none re? ected (back) ripple current (note 2) 20 ma pk-pk internal input filter type capacitive recommended external fuse 5a fast blow reverse polarity protection none. please install external fuse. input current: full load conditions see ordering guide inrush transient 0.4 a2sec. shutdown mode (off, uv, ot) 5 ma output in short circuit 60 ma low line (vin=vmin) 2.0a. (vout = 15v) remote on/off control (note 5) negative logic (n model suf? x) on = -0.3v to +1.2v off = (vin -2.5v) to 40v or open current 1 ma max. positive logic (p model suf? x) on = open pin (internally pulled up) or = (vin -2.5v) to 40v or open off = -0.3v to +1.2v current 1 ma max. output output power 36w max. minimum loading no minimum load accuracy (50% load, untrimmed) 2 % of vset voltage output range (note 13) see ordering guide overvoltage protection (note 16) none temperature coef? cient 0.02% per c of vout range ripple/noise (20 mhz bandwidth) see ordering guide and note 8 line/load regulation see ordering guide and note 10 ef? ciency see ordering guide maximum capacitive loading (note 14) cap-esr=0.001 to 0.01 ohms 1,000 f cap-esr >0.01 ohms 3,000 f (min. cap. load 0 f ) current limit inception (note 6) (98% of vout setting, after warm up) 4.5 amps short circuit mode short circuit current output 0.0 a protection method hiccup autorecovery upon overload removal. (note 17) short circuit duration continuous, no damage (output shorted to ground) prebias startup converter will start up if the external output voltage is less than vnominal. dynamic characteristics dynamic load response tbdsec max. to within 2% of ? nal value (50-100 load step, di/dt=1a/ sec, 5 vout, cout = 1&10 f ceramic) start-up time 8 msec for vout=nominal (vin on) (vin on or on/off to vout regulated) 8 msec for vout=nominal (remote on/off) switching frequency 300 khz environmental calculated mtbf telecordia method (4a) tbd calculated mtbf mil-hdbk-217n2 method (4b) tbd operating temperature range (ambient) see derating curves -40 to +85 ?c. with derating (note 9) operating pc board temperature -40 to +100 ?celsius max., no derating (12) storage temperature range -55 to +125 deg. c. thermal protection/shutdown +130 ?celsius relative humidity to 85%/+85 ?c., non-condensing physical outline dimensions see mechanical speci? cations weight 0.072 ounces (2.04 grams) safety designed to meet ul/cul 60950-1, csa- c22.2 no. 60950-1, iec/en 60950-1 restriction of hazardous substances rohs-6 ( does not claim eu rohs exemption 7bClead in solder ) msl rating 2 absolute maximum ratings input voltage (continuous or transient) 0 v.to +40 volts max. on/off control 0 v. min. to +vin max. input reverse polarity protection none. install external fuse. output current (note 7) current-limited. devices can withstand a sustained short circuit without damage. the outputs are not intended to accept appreciable reverse current. storage temperature -55 to +125 ?c. lead temperature see soldering speci? cations absolute maximums are stress ratings. exposure of devices to greater than any of any of these conditions may adversely affect long-term reliability. proper operation under conditions other than those listed in the performance/functional speci? cations table is not implied nor recommended. speci? cation notes: (1) speci? cations are typical at +25 c, vin=nominal (+24v.), vout=nominal (+12v), full load, external caps and natural convection unless otherwise indicated. extended tests at full power must supply substantial forced air? ow. all models are tested and speci? ed with external 1 f paralleled with 10f ceramic/tantalum output capacitors and a 22 f external input capacitor. all capacitors are low esr types. these capacitors are necessary to accommodate our test equipment and may not be required to achieve speci? ed performance in your applications. however, murata power solutions recommends installation of these capacitors. all models are stable and regulate within spec under no-load conditions. (2) input back ripple current is tested and speci? ed over a 5 hz to 20 mhz bandwidth. input ? ltering is cin=2 x 100 f tantalum, cbus=1000 f electrolytic, lbus=1 h. (3) note that maximum power derating curves indicate an average current at nominal input voltage. at higher temperatures and/or lower air? ow, the dc/dc converter will tolerate brief full current outputs if the total rms current over time does not exceed the derating curve. (4a) mean time before failure is calculated using the telcordia (belcore) sr-332 method 1, case 3, ground ? xed conditions, tpcboard=+25 ?c, full output load, natural air convection. (4b) mean time before failure is calculated using the mil-hdbk-217n2 method, ground benign, +25oc., full output load, natural convection. mdc_oki-t/36w-w40.a02 p age 4 of 12 oki-t/36w-w40 series selectable output 36-watt dosa-smt dc/dc converters www.murata-ps.com/support
speci? cation notes, cont.: (5) the on/off control input should use either a switch or an open collector/open drain transistor referenced to -input common. a logic gate may also be used by applying appropriate external voltages which do not exceed +vin. (6) short circuit shutdown begins when the output voltage degrades approximately 2% from the selected setting. (7) deleted. (8) output noise may be further reduced by adding an external ? lter. at zero output current, the output may contain low frequency components which exceed the ripple speci? cation. the output may be operated inde? nitely with no load. (9) all models are fully operational and meet published speci? cations, including cold start at C40? c. (10) regulation speci? cations describe the deviation as the line input voltage or output load current is varied from a nominal midpoint value to either extreme. (11) other input or output voltage ranges will be reviewed under scheduled quantity special order. (12) maximum pc board temperature is measured with the sensor in the center of the converter. (13) do not exceed maximum power speci? cations when adjusting the output trim. (14) the maximum output capacitive loads depend on the the equivalent series resistance (esr) of the external output capacitor and, to a lesser extent, the distance and series impedance to the load. larger caps will reduce output noise but may change the transient response. newer ceramic caps with very low esr may require lower capacitor values to avoid instability. thoroughly test your capacitors in the application. please refer to the output capacitive load application note. (15) do not allow the input voltage to degrade lower than the input undervoltage shutdown voltage at all times. otherwise, you risk having the converter turn off. the undervoltage shutdown is not latching and will attempt to recover when the input is brought back into normal operating range. (16) the outputs are not intended to sink appreciable reverse current. (17) hiccup overcurrent operation repeatedly attempts to restart the converter with a brief, full-current output. if the overcurrent condition still exists, the restart current will be removed and then tried again. this short current pulse prevents overheating and damaging the converter. once the fault is removed, the converter immediately recovers normal operation. output voltage adustment the output voltage may be adjusted over a limited range by connecting an external trim resistor (rtrim) between the trim pin and ground. the rtrim resistor must be a 1/10 watt precision metal ? lm type, 1% accuracy or better with low temperature coef? cient, 100 ppm/oc. or better. mount the resistor close to the converter with very short leads or use a surface mount trim resistor. in the tables below, the calculated resistance is given. do not exceed the speci? ed limits of the output voltage or the converters maximum power rating when applying these resistors. also, avoid high noise at the trim input. however, to prevent instability, you should never connect any capaci- tors to trim. soldering guidelines murata power solutions recommends the speci? cations below when installing these converters. these speci? cations vary depending on the solder type. exceeding these speci? cations may cause damage to the product. your production environment may differ therefore please thoroughly review these guidelines with your process engineers. recommended lead-free solder re? ow pro? le high trace = normal upper limit low trace - normal lower limit reflow solder operations for surface-mount products (smt) for sn/ag/cu based solders: preheat temperature less than 1 oc. per second time over liquidus 45 to 75 seconds maximum peak temperature 260 oc. cooling rate less than 3 oc. per second for sn/pb based solders: preheat temperature less than 1 oc. per second time over liquidus 60 to 75 seconds maximum peak temperature 235 oc. cooling rate less than 3 oc. per second r trim ( ) = _____________ C 1000 v out C 5.021v 10500 output voltage calculated rtrim () 15 v. 52.21 12 v. 504.5 10 v. 1108.9 9 v. 1638.9 8 v. 2524.7 7 v. 4305.7 6 v. 9725.2 5.02 v. (open) resistor trim equation: mdc_oki-t/36w-w40.a02 p age 5 of 12 oki-t/36w-w40 series selectable output 36-watt dosa-smt dc/dc converters www.murata-ps.com/support
input fusing certain applications and/or safety agencies may require fuses at the inputs of power conversion components. fuses should also be used when there is the possibility of sustained input voltage reversal which is not current-limited. for greatest safety, we recommend a fast blow fuse installed in the ungrounded input supply line. the installer must observe all relevant safety standards and regulations. for safety agency approvals, install the converter in compliance with the end-user safety standard. input under-voltage shutdown and start-up threshold under normal start-up conditions, converters will not begin to regulate properly until the rising input voltage exceeds and remains at the start-up threshold voltage (see speci? cations). once operating, converters will not turn off until the input voltage drops below the under-voltage shutdown limit. subsequent restart will not occur until the input voltage rises again above the start-up threshold. this built-in hysteresis prevents any unstable on/off operation at a single input voltage. users should be aware however of input sources near the under-voltage shutdown whose voltage decays as input current is consumed (such as capacitor inputs), the converter shuts off and then restarts as the external capacitor recharges. such situations could oscillate. to prevent this, make sure the operating input voltage is well above the uv shutdown voltage at all times. start-up time assuming that the output current is set at the rated maximum, the vin to vout start-up time (see speci? cations) is the time interval between the point when the rising input voltage crosses the start-up threshold and the fully loaded regulated output voltage enters and remains within its speci? ed accuracy band. actual measured times will vary with input source impedance, external input capacitance, input voltage slew rate and ? nal value of the input voltage as it appears at the converter. these converters include a soft start circuit to moderate the duty cycle of its pwm controller at power up, thereby limiting the input inrush current. the on/off remote control interval from inception to vout regulated assumes that the converter already has its input voltage stabilized above the start-up threshold before the on command. the interval is measured from the on command until the output enters and remains within its speci? ed regulation band. the speci? cation assumes that the output is fully loaded at maximum rated current. similar conditions apply to the on to vout regulated speci? cation such as external load capacitance and soft start circuitry. recommended input filtering the user must assure that the input source has low ac impedance to provide dynamic stability and that the input supply has little or no inductive content, including long distributed wiring to a remote power supply. the converter will operate with no additional external capacitance if these conditions are met. application notes for best performance, we recommend installing a low-esr capacitor immediately adjacent to the converters input terminals. the capacitor should be a ceramic type such as the murata grm32 series or a polymer type. initial suggested capacitor values are 10 to 22 f, rated at twice the expected maxi- mum input voltage. make sure that the input terminals do not go below the undervoltage shutdown voltage at all times. more input bulk capacitance may be added in parallel (either electrolytic or tantalum) if needed. recommended output filtering the converter will achieve its rated output ripple and noise with no additional external capacitor. however, the user may install more external output capaci- tance to reduce the ripple even further or for improved dynamic response. again, use low-esr ceramic (murata grm32 series) or polymer capacitors. initial values of 10 to 47 f may be tried, either single or multiple capacitors in parallel. mount these close to the converter. measure the output ripple under your load conditions. use only as much capacitance as required to achieve your ripple and noise objectives. excessive capacitance can make step load recovery sluggish or possibly introduce instability. do not exceed the maximum rated output capaci- tance listed in the speci? cations. input ripple current and output noise all models in this converter series are tested and speci? ed for input re? ected ripple current and output noise using designated external input/output compo- nents, circuits and layout as shown in the ? gures below. the cbus and lbus components simulate a typical dc voltage bus. please note that the values of cin, lbus and cbus will vary according to the speci? c converter model. in ? gure 3, the two copper strips simulate real-world printed circuit imped- ances between the power supply and its load. in order to minimize circuit errors and standardize tests between units, scope measurements should be made using bnc connectors or the probe ground should not exceed one half- inch and soldered directly to the test circuit. c in v in c bus l bus c in = 2 x 100f, esr < 700m @ 100khz c bus = 1000f, esr < 100m @ 100khz l bus = 1h +input -input current probe to oscilloscope + C + C figure 2. measuring input ripple current mdc_oki-t/36w-w40.a02 p age 6 of 12 oki-t/36w-w40 series selectable output 36-watt dosa-smt dc/dc converters www.murata-ps.com/support
minimum output loading requirements all models regulate within speci? cation and are stable under no load to full load conditions. operation under no load might however slightly increase output ripple and noise. thermal shutdown to prevent many over temperature problems and damage, these converters include thermal shutdown circuitry. if environmental conditions cause the temperature of the dc/dcs to rise above the operating temperature range up to the shutdown temperature, an on-board electronic temperature sensor will power down the unit. when the temperature decreases below the turn-on threshold, the converter will automatically restart. there is a small amount of hysteresis to prevent rapid on/off cycling. caution: if you operate too close to the thermal limits, the converter may shut down suddenly without warning. be sure to thoroughly test your applica- tion to avoid unplanned thermal shutdown. temperature derating curves the graphs in the next section illustrate typical operation under a variety of conditions. the derating curves show the maximum continuous ambient air temperature and decreasing maximum output current which is acceptable under increasing forced air? ow measured in linear feet per minute (lfm). note that these are average measurements. the converter will accept brief increases in current or reduced air? ow as long as the average is not exceeded. note that the temperatures are of the ambient air? ow, not the converter itself which is obviously running at higher temperature than the outside air. also note that natural convection is de? ned as very ? ow rates which are not using fan-forced air? ow. depending on the application, natural convection is usually about 30-65 lfm but is not equal to still air (0 lfm). murata power solutions makes characterization measurements in a closed cycle wind tunnel with calibrated air? ow. we use both thermocouples and an infrared camera system to observe thermal performance. as a practical matter, it is quite dif? cult to insert an anemometer to precisely measure air? ow in most applications. sometimes it is possible to estimate the effective air? ow if you thoroughly understand the enclosure geometry, entry/exit ori? ce areas and the fan ? owrate speci? cations. caution: if you exceed these derating guidelines, the converter may have an unplanned over temperature shut down. also, these graphs are all collected near sea level altitude. be sure to reduce the derating for higher altitude. output fusing the converter is extensively protected against current, voltage and temperature extremes. however your output application circuit may need additional protec- tion. in the extremely unlikely event of output circuit failure, excessive voltage could be applied to your circuit. consider using an appropriate fuse in series with the output. output current limiting current limiting inception is de? ned as the point at which full power falls below the rated tolerance. see the performance/functional speci? cations. note par- ticularly that the output current may brie? y rise above its rated value in normal operation as long as the average output power is not exceeded. this enhances reliability and continued operation of your application. if the output current is too high, the converter will enter the short circuit condition. output short circuit condition when a converter is in current-limit mode, the output voltage will drop as the output current demand increases. if the output voltage drops too low (approxi- mately 98% of nominal output voltage for most models), the pwm bias voltage will also drop, thereby shutting down the pwm controller. following a time-out period, the pwm will restart, causing the output voltage to begin ramping up to its appropriate value. if the short-circuit condition persists, another shutdown cycle will initiate. this rapid on/off cycling is called hiccup mode. the hiccup cycling reduces the average output current, thereby preventing excessive inter- nal temperatures and/or component damage. a short circuit can be tolerated inde? nitely. the hiccup system differs from older latching short circuit systems because you do not have to power down the converter to make it restart. the system will automatically restore operation as soon as the short circuit condi- tion is removed. remote on/off control on the input side, a remote on/off control can be ordered with either polarity. please refer to the connection diagram on page 1 for on/off connections. positive-polarity models are enabled when the on/off pin is left open or is pulled high to +vin with respect to Cvin. positive-polarity devices are disabled when the on/off is grounded or brought to within a low voltage (see speci? ca- tions) with respect to Cvin. negative-polarity devices are on (enabled) when the on/off is left open or brought to within a low voltage (see speci? cations) with respect to Cvin. the device is off (disabled) when the on/off is pulled high (see speci? cations) with respect to Cvin. dynamic control of the on/off function should be able to sink the speci- ? ed signal current when brought low and withstand the speci? ed voltage when brought high. be aware too that there is a ? nite time in milliseconds (see speci? cations) between the time of on/off control activation and stable, regulated output. this time will vary slightly with output load type and current and input conditions. c1 c1 = 0.1f ceramic c2 = 10f tantalum load 2-3 inches (51-76mm) from module c2 r load copper strip copper strip scope +output -output figure 3. measuring output ripple and noise (pard) mdc_oki-t/36w-w40.a02 p age 7 of 12 oki-t/36w-w40 series selectable output 36-watt dosa-smt dc/dc converters www.murata-ps.com/support
output capacitive load these converters do not require external capacitance added to achieve rated speci? cations. users should only consider adding capacitance to reduce switching noise and/or to handle spike current load steps. install only enough capacitance to achieve noise objectives. excess external capacitance may cause regulation problems, degraded transient response and possible oscilla- tion or instability. mdc_oki-t/36w-w40.a02 p age 8 of 12 oki-t/36w-w40 series selectable output 36-watt dosa-smt dc/dc converters www.murata-ps.com/support
performance data ? oki-t/36w-w40 maximum current temperature derating at sea level (v in = 19v, v out = 15v, transverse air? ow) maximum current temperature derating at sea level (v in = 24v, v out = 15v, transverse air? ow) 0 1 2 3 4 30 35 40 45 50 55 60 65 70 75 80 85 65 lfm 100 lfm 200 lfm 300 lfm ambient temperature (oc) output current (amps) 0 1 2 3 4 30 35 40 45 50 55 60 65 70 75 80 85 65 lfm 100 lfm 200 lfm 300 lfm ambient temperature (oc) output current (amps) ef? ciency vs. line voltage and load current @ +25 c (v out = 15v) ef? ciency vs. line voltage and load current @ +25 c (v out = 9v) ef? ciency vs. line voltage and load current @ +25 c (v out = 12v) ef? ciency vs. line voltage and load current @ +25 c (v out = 5v) 40 50 60 70 80 90 100 0 0.5 1 1.5 2 2.5 3 3.5 load curre nt (amps) ef?ciency (%) v in = 19v v in = 24v v in = 40v 40 50 60 70 80 90 100 0 0.5 1 1.5 2 2.5 3 3.5 load curre nt (amps) ef?ciency (%) v in = 19v v in = 24v v in = 40v 40 50 60 70 80 90 100 0 0.5 1 1.5 2 2.5 3 3.5 load curre nt (amps) ef?ciency (%) v in = 19v v in = 24v v in = 40v 40 50 60 70 80 90 100 0 0.5 1 1.5 2 2.5 3 3.5 load curre nt (amps) ef?ciency (%) v in = 19v v in = 24v v in = 40v mdc_oki-t/36w-w40.a02 p age 9 of 12 oki-t/36w-w40 series selectable output 36-watt dosa-smt dc/dc converters www.murata-ps.com/support
performance data ? oki-t/36w-w40 maximum current temperature derating at sea level (v in = 19v, v out = 12v, transverse air? ow) maximum current temperature derating at sea level (v in = 40v, v out = 12v, transverse air? ow) maximum current temperature derating at sea level (v in = 40v, v out = 15v, transverse air? ow) maximum current temperature derating at sea level (v in = 24v, v out = 12v, transverse air? ow) 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 30 35 40 45 50 55 60 65 70 75 80 85 65 lfm 100 lfm ambient temperature (oc) output current (amps) 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 30 35 40 45 50 55 60 65 70 75 80 85 65 lfm 100 lfm 200 lfm 300 lfm 400 lfm ambient temperature (oc) output current (amps) 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 30 35 40 45 50 55 60 65 70 75 80 85 65 lfm 100 lfm 200 lfm 300 lfm ambient temperature (oc) output current (amps) maximum current temperature derating at sea level (v in = 19v, v out = 5v, transverse air? ow) maximum current temperature derating at sea level (v in = 24v, v out = 5v, transverse air? ow) 0 1 2 3 4 30 35 40 45 50 55 60 65 70 75 80 85 65 lfm 100 lfm 200 lfm 300 lfm ambient temperature (oc) output current (amps) 0 1 2 3 4 30 35 40 45 50 55 60 65 70 75 80 85 65 lfm ambient temperature (oc) output current (amps) 0 1 2 3 4 30 35 40 45 50 55 60 65 70 75 80 85 65 lfm ambient temperature (oc) output current (amps) mdc_oki-t/36w-w40.a02 p age 10 of 12 oki-t/36w-w40 series selectable output 36-watt dosa-smt dc/dc converters www.murata-ps.com/support
performance data ? oki-t/36w-w40 maximum current temperature derating at sea level (v in = 40v, v out = 5v, transverse air? ow) 0 1 2 3 4 30 35 40 45 50 55 60 65 70 75 80 85 65 lfm 100 lfm 200 lfm 300 lfm 400 lfm ambient temperature (oc) output current (amps) step load transient response (vin=24v, vout=12v, cload=0, iout=1.5a to 3a) trace 2=vout, 100 mv/div. trace 4=iout, 1a/div. step load transient response (vin=24v, vout=12v, cload=0, iout=3a to 1.5a) trace 2=vout, 100 mv/div. trace 4=iout, 1a/div. on/off enable delay (vin=19v, vout=12v, iout=3.3a, cload=0) trace 4=enable, trace 2=vout output ripple and noise (vin=24v, vout=12v, iout=3.23a, cload=0, scopebw=100mhz) mdc_oki-t/36w-w40.a02 p age 11 of 12 oki-t/36w-w40 series selectable output 36-watt dosa-smt dc/dc converters www.murata-ps.com/support
third angle projection dimensions are in inches (mm shown for ref. only). components are shown for reference only. tolerances (unless otherwise speci?ed): .xx 0.02 (0.5) .xxx 0.010 (0.25) angles 1? (p/u) 2.33 40.40 1.591 2.00 0.079 22.25 (p/u) 0.876 0.092 0.630 16.00 4.00 (core) 101.6 ref 5.64 0.222 0.420 10.67 1.73 ref 44.0 top cover tape feed (unwind) direction ------- round holes oblong holes pick & place pickup (p/u) reel information (400 units per reel) 1.732 44.00 0.157 4.00 13.00 330.2 .512 13.00 pin #1 this corner (farside) pickup nozzle location ( 3-6mm) 0.47 ref 11.9 0.82 ref 20.8 0.270 6.86 tape and reel information mdc_oki-t/36w-w40.a02 p age 12 of 12 oki-t/36w-w40 series selectable output 36-watt dosa-smt dc/dc converters murata power solutions, inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. the descriptions contained her ein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. speci? cations are subject to cha nge without notice. ? 2011 murata power solutions, inc. murata power solutions, inc. 11 cabot boulevard, mans? eld, ma 02048-1151 u.s.a. iso 9001 and 14001 registered www.murata-ps.com/support

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