1 + positive input inhibit fb shutdown pwm controller input common +v in +v out + + dual models only negative output output common positive output 3 4 6 1 7 2 0.47 f typical mch series 1.5 watt f eatures -55? to +125? operation 12 to 50 vdc input fully isolated magnetic feedback fixed frequency 370 khz typ. topology ?current mode flyback ? 80 v for up to 120 ms transient protection (70 v for 15 v single and dual models) inhibit function short circuit protection undervoltage lockout models vdc o utput description with a miniature footprint of just 0.8 square inches, the mch series of dc/dc converters delivers 1.5 watts of output power while saving significant board real estate. the wide input voltage range of 12 to 50 vdc accepts the varying voltages of military, aero- space, or space bus power and tightly regulates output voltages to protect downstream components. transient protection of 80 volts for up to 120 milliseconds exceeds the requirements of mil-std-704a for the 5, 5.2, and 12 volt single models and the 12 volt dual model. the 15 volt single and dual converters will withstand transients of up to 70 volts for up to 120 milliseconds. c onverter d esign mch series dc/dc converters incorporate a continuous flyback topology with a constant switching frequency of approximately 370 khz. current-mode pulse width modulation (pwm) provides output voltage regulation. output error voltage is magnetically fed back to the input side of the pwm to regulate output voltage. regulation is also affected by the load; refer to the electrical characteristics tables on the following pages. dual models regulate the negative output with magnetic coupling to the positive output. up to 80% of the total load may be on one output providing that the other output carries a minimum of 20% of the total load. the dual models can be used at double the output voltage by connecting the load between positive and negative outputs, leaving the common unconnected. (ex: mch2805d can be used as a 10 vdc output.) i nhibit f unction when an open collector ttl logic low is applied to the inhibit terminal, pin 7, the converter shuts down and lowers the output voltage to near zero and input current to as low as 2.3 ma. leaving the terminal open or applying an open collector ttl logic high will enable the converter. p rotection f eatures undervoltage lockout prevents the mch series converters from operating below approximately 8 vdc input voltage to keep system current levels smooth, especially during initialization or re-start oper- ations. all models include a soft-start function to prevent large current draw and minimize overshoot. the converters also provide short circuit protection by restricting the current. mil-std-461 use interpoint s fmsa-461 emi filter to pass the ce03 requirements of mil-std-461c. c onvenient p ackaging the mch series converters are packaged in hermetically sealed, projection-welded metal cases which provide emi/rfi shielding. singles 5 5.2 12 15 duals ? ? 2 ? 5 dc/dc c onverters 28 v olt i nput f igure 1: b lock d iagram size (max.): 0.980 x 0.805 x 0.270 inches (24.89 x 20.45 x 6.86 mm) weight: 12 grams max. screening: standard, es, or 883 (class h)
typical characteristics recommended operating conditions absolute maximum ratings inhibit 2 mch series 1.5 watt dc/dc c onverters single output models mch2805s mch285r2s mch2812s mch2815s parameter conditions min typ max min typ max min typ max min typ max units output voltage 1 tc = 25? 4.95 5 5.05 5.15 5.2 5.25 11.88 12 12.12 14.85 15 15.15 vdc tc = ?5? to +125? 4.80 5 5.20 5.00 5.2 5.40 11.52 12 12.48 14.40 15 15.60 output current v in = 12 to 50 vdc 300 0 288 0 125 0 100 ma output power v in = 12 to 50 vdc 0 1.5 0 1.5 0 1.5 0 1.5 w output ripple 10 khz - 2 mhz 45 150 45 150 50 200 35 150 mv p-p voltage tc = ?5? to +125? 65 300 65 300 70 300 50 250 line regulation v in = 12 to 50 vdc 35 100 35 100 60 200 70 300 mv tc = ?5? to +125? 40 120 40 120 70 250 80 350 load regulation 10% to full load 350 700 350 700 600 1300 700 1500 tc = ?5? to +125? 380 800 380 800 640 1400 760 1600 mv 50% to full 100 200 100 200 145 300 165 350 tc = ?5? to +125? 115 300 115 300 160 400 185 450 input voltage continuous 12 28 50 12 28 50 12 28 50 12 28 50 vdc no load to full transient 120 ms 0 80 0 80 0 80 0 70 v input current no load 5.5 10 5.5 10 6.0 10 6.0 11 tc = ?5? to +125? 6.0 11 6.0 11 6.5 12 6.5 12 full load 70 74 70 74 68 72 68 72 ma tc = ?5? to +125? 73 78 73 78 70 74 70 74 inhibited 2.3 3.2 2.3 3.2 2.3 3.2 2.3 3.2 tc = ?5? to +125? 2.4 3.5 2.4 3.5 2.4 3.5 2.4 3.5 input ripple 10k hz - 10 mhz 100 200 100 200 100 200 100 200 ma p-p current 2 tc = ?5? to +125? 130 250 130 250 150 250 150 250 efficiency tc = 25? 72 77 72 77 74 79 74 79 % tc = ?5? to +125? 69 75 69 75 72 77 72 77 load fault 3, 4 power dissipation 1.3 2.0 1.3 2.0 2.0 3.2 2.3 3.7 w tc = ?5? to +125? 1.4 2.3 1.4 2.3 2.2 3.5 2.5 4.0 recovery 3.0 12 3.0 12 3.5 15 4.0 18 ms tc = -?5? to +125? 3.5 15 3.5 15 3.5 20 4.0 20 step load 50 %?00%?50% load response 5 transient ?00 185 400 ?00 185 400 ?00 350 700 ?00 350 700 mv pk tc = ?5? to +125? ?00 185 500 ?00 185 500 ?00 380 800 ?00 380 800 recovery 125 500 125 500 130 500 140 600 ? tc =?5? to +125? 125 600 125 600 130 600 180 750 step line 12 to 50 to 12 v in response 5 transient ?00 170 400 ?00 170 400 ?00 400 900 ?50 400 750 mv pk tc = ?5? to +125? ?00 180 500 ?00 180 500 ?000 400 1000 ?50 450 850 recovery 0.75 3.0 0.75 3.0 0.6 2.5 0.47 2.0 ms tc = ?5? to +125? 0.75 4.0 0.75 4.0 0.6 3.0 0.5 2.5 start-up delay 7 20 7 20 7 20 7 20 ms 0 to 28 vdc tc = ?5? to +125? 10 40 10 40 10 40 10 40 overshoot 0 100 0 100 0 250 0 300 mv pk tc = ?5? to +125? 0 150 0 150 0 350 0 450 input voltage 12 to 50 vdc output power 1.5 w capacitive load single output models 200 f dual output models 100 f lead soldering temperature (10 sec per lead) 300? storage temperature range (case) ?5? to +150? input voltage range 12 to 50 vdc continuous 80 v for 120 msec transient (70 v for 15 v single and dual models) case operating temperature (tc) ?5? to +125? full power ?5? to +135? absolute derating output power/current (tc) linearly from 100% at 125? to 0% at 135? inhibit ?ttl open collector logic low (output disabled) 0.8 v max inhibit pin current 1 ma max referenced to input common logic high (output enabled) open collector see notes 1, 2, 3, 4, 5, and 6 on the following page. electrical characteristics: 25? tc, 28 vdc vin, 100% load, unless otherwise specified. output voltage temperature coefficient 100 ppm/? typical input to output capacitance 100 to 170 pf typical undervoltage lockout 8 v input typical current limit 125% of full load typical isolation 100 megohm minimum at 500 v audio rejection 40 db, typical conversion frequency (khz) 25?, 300 min, 370 typ, 450 max ?5? to +125? 270 min, 370 typ, 470 max inhibit pin voltage (unit enabled) 7 to 12 v
3 mch series 1.5 watt dc/dc c onverters notes: 1. specified at 50% load. 2. lin = 2 h. 3. maximum duration of short circuit: 25?-?90 seconds, 125? ?30 seconds. 4. load fault is a short circuit (<50 mohms). recovery is into resistive full load. 5. transition 10 s. recovery = time to settle to within 1% of vout final value. 6. max. spec indicates 80% of the converter s total power, available from either output. 7. specification applies to both + and ?vout. 8. although no minimum load is required, at no load the output voltage may increase up to 15%. dual output models mch2805d mch2812d mch2815d parameter conditions min typ max min typ max min typ max units output voltage 1 tc = 25? 4.95 5 5.05 11.88 12 12.12 14.85 15 15.15 vdc tc = ?5? to +125? 4.80 5 5.20 11.52 12 12.48 14.40 15 15.60 output current 6 v in = 12 to 50 vdc 0 150 240 0 62.5 100 0 50 80 ma output power v in = 12 to 50 vdc 0 1.5 0 1.5 0 1.5 w output ripple 10 khz - 2 mhz 35 150 35 150 30 150 voltage +v out tc = ?5? to +125? 50 250 40 250 35 250 mv p-p ? out 10 khz - 2 mhz 35 150 35 150 30 150 tc = ?5? to +125? 50 250 40 250 35 250 line regulation 7 v in = 12 to 50 vdc 10 50 100 300 165 500 mv tc = ?5? to +125? 20 100 110 400 180 650 load regulation 8 10% to full 300 600 550 1100 600 1300 ? out ?5? to +125? 350 700 570 1200 630 1400 mv 50% to full 80 200 115 250 125 300 ?5? to +125? 100 300 130 350 135 400 input voltage continuous 12 28 50 12 28 50 12 28 50 vdc no load to full transient 120 ms 0 80 0 80 0 70 v input current no load 5.0 10 7.5 13 7.5 13 tc = ?5? to +125? 6.0 12 8.0 14 8.0 14 full load 69 73 70 73 71 74 ma tc = ?5? to +125? 72 77 71 77 72 78 inhibited 2.3 3.2 2.3 3.2 2.3 3.2 tc = ?5? to +125? 2.4 3.5 2.4 3.5 2.4 3.5 input ripple 2 10 khz - 10 mhz 100 200 115 200 90 200 ma p-p current tc = ?5? to +125? 130 250 150 250 120 250 efficiency tc = 25? 73 77 73 77 72 76 % tc = ?5? to +125? 70 75 70 75 69 74 load fault 3,4 power dissipation 1.4 2.2 2.5 3.8 2.7 4.1 w tc = ?5? to +125? 1.6 2.5 2.7 4.2 3.0 4.5 recovery 3.7 15 3.2 15 4.0 15 ms tc = ?5? to +125? 3.8 20 3.2 20 4.0 20 step load 50 %?00%?50% load response 5 ? out transient ?00 130 300 ?00 250 600 ?00 250 600 mv pk tc = ?5? to +125? ?00 140 400 ?00 260 700 ?00 270 700 recovery 100 400 165 700 50 200 ? ?5? to +125? 100 500 165 800 50 300 step line 12 to 50 to 12 v in response 5 ? out transient ?50 125 250 ?00 240 500 ?00 220 500 mv pk tc = ?5? to +125? ?00 130 300 ?00 250 600 ?00 230 600 recovery 0.6 2.5 0.9 3.0 0.6 3.0 ms tc = ?5? to +125? 0.6 3.0 0.9 4.0 0.7 4.0 start?p delay 8 25 8 25 8 25 ms 0 to 28 vdc, v out tc = ?5? to +125? 10 45 10 45 10 45 overshoot 0 100 0 250 0 750 mv pk tc = ?5? to +125? 0 150 0 350 0 900 electrical characteristics: 25? tc, 28 vdc vin, 100% load, unless otherwise specified.
mch 28 12 d / 883 base model input voltage output voltage screening number of outputs (s = single, d = dual) (r = decimal point, 3r3 = 3.3 vout) (standard screening has no designator in this position.) pin out smd numbers 4 mch series 1.5 watt dc/dc c onverters pin single output dual output 1 positive input positive input 2 input common input common 3 positive output positive output 4 output common output common 5 case ground case ground 6 no connection negative output 7 inhibit inhibit model numbering key f igure 2: p in o ut s tandard m icrocircuit d rawing (smd) 5962-9569601hxc in process 5962-9569701hxc 5962-9569801hxc 5962-9570201hxc 5962-9570301hxc 5962-9570401hxc mch s eries s imilar p art mch2805s/883 mch285r2s/883 mch2812s/883 mch2815s/883 mch2805d/883 mch2812d/883 mch2815d/883 squared corner and dot on top of cover indicate pin one. 14 75 23 6 for exact specifications for an smd product, refer to the smd drawing. call your interpoint representative for status on the mch series smd releases which are in process . smds can be down- loaded from http://www.dscccols.com/programs/smcr see page 7 for dimensions.
dc/dc c onverters 5 mch series 1.5 watt load transient response 200 mv / div. 500 s / div. mch2815d +v out full load to half load +v out half load to full load v out full load to half load v out half load to full load v in line transient response 200 mv / div. 200 s / div. 20 v / div. +v out mch2815d v out 12 vdc 50 vdc 2v/div. v in 20v/div. v out turn-on into full load 024 6 810 12 14 16 18 time (ms) mch2805s representative of all 5 volt models f igure 9f igure 10 f igure 11 typical performance curves: tc = 25?, full load, vin = 28 vdc, unless otherwise specified. f igure 3 f igure 4 f igure 5 f igure 6 f igure 7 f igure 8 efficiency vs load 1.75 efficiency 30 80 40 50 60 70 0 0.25 0.5 0.75 1 1.25 1.5 output power 12 & 15 volt single models 12 volt 28 volt 50 volt 90 efficiency vs load 1.75 efficiency 30 80 40 50 60 70 0 0.25 0.5 0.75 1 1.25 1.5 output power 12 & 15 volt dual models 12 volt 28 volt 50 volt 90 efficiency vs load 1.75 90 efficiency 30 80 40 50 60 70 0 0.25 0.5 0.75 1 1.25 1.5 output power all 5 volt models 12 volt 28 volt 50 volt 1 0 20 40 60 80 100 attenuation (db) audio rejection 10 60 frequency (khz) mch2815s - representative of all models v in line transient response 100 mv / div. 200 s / div. 20 v / div. v out mch2805s 12 vdc 50 vdc load transient response 100 mv / div. 500 s / div. mch2805s full load to half load half load to full load
6 mch series 1.5 watt dc/dc c onverters f igure 15 f igure 16 f igure 17 5v /div. v in 2 0 v /d iv. v out turn-on into full load 0510 15 20 25 30 35 40 45 time (ms) mch2815d also representative of mch2812s & d and mch2815s +v out 0 v for v out 0 v for + v out cross regulation 50% load +v; 50% to 10% load v and 50% load v; 50% to 10% load +v v out voltage change (%) 4 -4 -2 0 2 10 20 30 40 50 output load (%) dual isolated 5 v 12 v 15 v 5 v 12 v 15 v v out voltage change (%) 4 -4 -2 0 2 90/10 70/30 50/50 30/70 10/90 output load (%) dual isolated cross regulation 90% to 10% load on +v 10% to 90% load on v +5 v +12 v +15 v maximum power (w) 0.8 1.8 1.0 1.2 1.4 1.6 910 11 12 input voltage all models low line dropout 12 v single & dual 15 v single & dual 5 v dual 5 v single 120 100 80 60 40 20 0 v out nominal % % of full load output voltage vs. output load 0 20 40 60 80 100 120 140 160 safe operating area trip point 125% frequency (mhz) emission level (db a) 0.1 1 10 50 90 70 50 30 10 .015 mch filtered with fmsa ce03 limit narrowband f igure 12 f igure 13 f igure 14 typical performance curves: tc = 25?, full load, vin = 28 vdc, unless otherwise specified.
7 mch series 1.5 watt dc/dc c onverters case a bottom view see figure 19 for pin configurations. dot on top of case indicates pin one. 0.980 max (24.89) 0.805 max (20.45) materials header kovar/nickel/gold (case a3, kovar/nickel) cover kovar/nickel pins kovar/nickel/gold, matched glass seal case dimensions in inches (mm) tolerance 0.005 (0.13) for three decimal places 0.01 (0.3) for two decimal places unless otherwise specified caution heat from reflow or wave soldering may damage the device. solder pins individually with heat application not exceeding 300 c for 10 seconds per pin. 0.000 0.097 (2.46) 0.697 (17.70 0.000 0.135 (3.43) 0.835 (21.21) 0.270 max (6.98) 0.000 14 75 23 6 0.235 (5.97) 0.435 (11.05) 0.535 (13.59) mch series: screening standard, es, or 883 bottom view case a2 0.270 max (6.86) 0.000 0.27 0.02 (6.9 0.5) 0.27 0.02 (6.9 0.5) projection weld seam seal squared corner and dot on top of case indicate pin one. 0.018 0.002 dia. (0.46 0.05) f igure 18: c ase a m aximum d imensions f igure 19: c ase a note: although every effort has been made to render the case drawings at actual size, variations in the printing process may ca use some distortion. please refer to the numerical dimensions for accuracy.
8 mch series 1.5 watt dc/dc c onverters test 125 c 125 c standard /es /883 (class h)* pre-cap inspection method 2017, 2032 yes yes yes temperature cycle (10 times) method 1010, cond. c, -65 c to 150 c no no yes method 1010, cond. b, -55 c to 125 c no yes no constant acceleration method 2001, 3000 g no no yes method 2001, 500 g no yes no burn-in method 1015, 160 hours at 125 c no no yes 96 hours at 125 c case (typical) no yes no final electrical test mil-prf-38534, group a subgroups 1 through 6: -55 c, +25 c, +125 c no no yes subgroups 1 and 4: +25 c case yes yes no hermeticity testing fine leak, method 1014, cond. a no yes yes gross leak, method 1014, cond. c no yes yes gross leak, dip (1 x 10 -3 ) yes no no final visual inspection method 2009 yes yes yes test methods are referenced to mil-std-883 as determined by mil-prf-38534. *883 products are built with element evaluated components and are 100% tested and guaranteed over e nvironmental s creening 22422-001-dts rev c this revision supercedes all previous releases. all technical information is believed to be accurate, but no responsibility is assumed for errors or omissions. interpoint reserves the right to make changes in products or specifications without notice. mga series is a trademark of interpoint. copyright ? 1997 - 2000 interpoint. all rights reserved. contact information: interpoint headquarters usa phone: 1-800-822-8782 +425-882-3100 email: power@intp.com www.interpoint.com interpoint uk phone: +44-1252-872266 email: poweruk@intp.com interpoint france phone: +33-134285455 email: powerfr@intp.com
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