1 msm series 5 watt f eatures ?5? to +125? operation 16 to 40 vdc input surface mountable will withstand solder reflow transient protection up to 80v/120 ms, meets mil-std-704a requirements inhibit function fully isolated ultra-wide bandwidth magnetic feedback up to 82% efficiency ? indefinite short circuit protection undervoltage shutdown below 10 vin description the msm series of dc/dc converters delivers up to 5 watts in a surface mountable package. the use of commercially available discrete components, printed wiring board construction, and surface mount technology keep costs low. mature design technology and severe derating maintain high-reliability, providing full power opera- tion over the full military temperature range of ?5 to +125?. output voltages of 3.3, 5, 5.2, 12, 15, 12, or 15 operate from an input range of 16 to 40 vdc. operation below 16 volts is possible at reduced power while still maintaining output regulation. the converters are rated for input transients up to 80 v for up to 120 milliseconds which meets the requirements for mil-std-704a. c onverter d esign the converters incorporate a flyback topology with a constant frequency to minimize emi and noise. the pulse-width-modulator is constructed of discrete devices to allow to the use of mature tech- nologies and assure operation over the full temperature range. a proprietary magnetic isolator, designed with feed-forward and load correction, provides nearly instantaneous output control for good output regulation. i nhibit f unction msm series converters provide a ttl open collector-compatible inhibit feature that can be used to disable internal switching and inhibit the unit s output. inhibiting in this manner results in low standby current, and no generation of switching noise. the converter is inhibited when the ttl compatible low ( 0.8 v) is applied to the inhibit pin. the unit is enabled when the pin, which is internally connected to a pull-up resistor, is left unconnected or is connected to an open collector gate. the open circuit output voltage associated with the inhibit pin is 9 to 11 v. in the inhibit mode, a maximum of 0.5 ma must be sunk from the inhibit pin. p rotection f eatures undervoltage lockout prevents the msm series converters from operating below approximately 10 vdc input. this circuitry can prevent system shutdown problems in starting ?onstant power devices at low input voltages. all models include a soft-start function to prevent large current draw and minimize overshoot under all load and line conditions. the msm series of converters also provide short circuit and overload protection. short circuit internal dissipation is lower than the internal dissipation which occurs during full load conditions. s urface m ountable p ackaging the msm series of dc/dc converters can be surface mounted or hand-soldered. maximum reflow temperature for surface mounting the msm converter is 230? for a maximum of 30 seconds. sn60, 62, or 63 are the recommended types of solder. hand soldering should not exceed 300? for 10 seconds per pin. dc/dc c onverters 28 v olt i nput size (max.): 2.01 x 2.01 x 0.312 inches (51.1 x 51.1 x 7.9 mm) weight: 20 grams maximum models vdc o utput singles 3.3 5 12 15 duals ? 2 ? 5
typical characteristics recommended operating conditions absolute maximum ratings inhibit 2 msm series 5 watt dc/dc c onverters single output models msm283r3s msm2805s msm2812s msm2815s parameter conditions min typ max min typ max min typ max min typ max units output voltage tc = 25? 3.25 3.3 3.35 4.93 5 5.08 11.82 12 12.18 14.78 15 15.23 vdc output current v in = 16 to 40 vdc 1.52 1.0 0.42 0.33 a output power v in = 16 to 40 vdc 0 5 0 5 0 5 0 5 w output ripple 10 khz - 2 mhz 250 200 180 150 mv p-p voltage tc = ?5? to +125? 1800 1500 1200 1000 line regulation v in = 16 to 40 vdc 60 80 120 150 mv load regulation no load to full 150 250 350 400 mv input voltage continuous 16 28 40 16 28 40 16 28 40 16 28 40 vdc no load to full transient 120 ms 0 80 0 80 0 80 0 80 v input current no load 28 25 20 16 full load 242 235 230 223 ma inhibited 4.5 4.5 4.5 4.5 input ripple 10k hz - 10 mhz 30 25 20 15 ma p-p current tc = ?5? to +125? 180 150 120 100 efficiency tc = 25? 74 76 78 80 % load fault power dissipation overload 1.9 1.8 1.7 1.5 w short circuit 1 1 0.9 0.8 0.7 recovery 2 9 8.5 8 7.5 ms output current trip point 2.2 1.5 0.7 0.56 a short circuit 2.3 1.6 0.8 0.6 step load 50 %?00%?50% response transient 3 350 350 400 400 mv pk recovery 2 0.8 0.8 1.0 1.0 ms step line 16 to 40 to 16 v in response transient 3 400 400 500 500 mv pk recovery 2 1.5 1.5 2.0 2.0 ms start-up delay 4 4 4 4 ms 0 to 28 vin overshoot 250 300 350 400 mv pk input voltage 16 to 40 vdc output power ? w power dissipation 1.9 w lead soldering temperature (10 sec per lead) 300? storage temperature range (base plate) ?5? to +130? input voltage range 16 to 40 vdc continuous 80 v for 120 msec transient case operating temperature (tc) ?5? to +125? full power ?5? to +130? absolute derating output power/current (tc) linearly from 100% at 125? to 0% at 130? inhibit ?ttl open collector logic low (output disabled) inhibit pin current 0.34 ma typ referenced to input common logic high (output enabled) open collector electrical characteristics: 25? tc, 28 vdc vin, 100% load, unless otherwise specified. output voltage temperature coefficient 200 ppm/? typical temperature rise (still air) 18? / watt dissipated, typical input to output capacitance 100 pf typical undervoltage lockout 10 v input typical current limit 160% of full load typical isolation 100 megohm minimum at 500 v conversion frequency (khz) 25?, 200 min, 300 typ, 400 max inhibit pin voltage (unit enabled) 10 v, typical notes: 1. short circuit is measured with a 50 mohm resistive load. 2. time to settle within 1% of v out 3. transition 10 s.
3 msm series 5 watt dc/dc c onverters notes: 1. the maximum specification indicates the converter s total output power, up to 75% of the total is available from either output providing the other output maintains a minimum of 25% of the total power. 2. short circuit is measured with a 50 mohm resistive load. 3. time to settle within 1% of v out 4. transition 10 s. dual output models MSM2812D msm2815d parameter conditions min typ max min typ max units output voltage tc = 25? 11.82 12 12.18 14.78 15 15.23 vdc output current v in = 16 to 40 vdc 0 208 0 167 ma output power 1 v in = 16 to 40 vdc 0 5 0 5 w output ripple 10 khz - 2 mhz 180 150 voltage +v out tc = ?5? to +125? 1200 1000 mv p-p ? out 10 khz - 2 mhz 180 150 tc = ?5? to +125? 1200 1000 line regulation +v out 120 150 mv v in = 16 to 40 vdc ? out 120 150 load regulation +v out 350 400 mv no load to full ? out 350 400 input voltage continuous 16 28 40 16 28 40 vdc no load to full transient 120 ms 0 80 0 80 v input current no load 20 16 full load 230 220 ma inhibited 4.5 4.5 input ripple 10 khz - 2 mhz 20 15 ma p-p current tc = ?5? to +125? 120 100 efficiency 80 82 % load fault power dissipation overload 1.7 1.5 w short circuit 2 0.8 0.7 recovery 3 8.0 7.5 ms output current trip point 350 280 short circuit 380 300 ma step load 50 %?00%?50% response v out transient 4 400 400 mv pk recovery 3 1 ? ms step line 16 to 40 to 16 v in response v out transient 4 500 500 mv pk recovery 3 2 ? ms start?p v out delay 4 3.5 ms overshoot 350 400 mv pk electrical characteristics: 25? tc, 28 vdc vin, 100% load, unless otherwise specified.
msm 28 12 d base model input voltage output voltage number of outputs (s = single, d = dual) pin out 4 msm series 5 watt dc/dc c onverters pin single output dual output 1 input common input common 2 input common input common 3 positive input positive input 4 no connection no connection 5 inhibit inhibit 6 no connection no connection 7 output common output common 8 positive output positive output 9 output common output common 10 no connection negative output model numbering key f igure 1: p in o ut to p v i e w component side 1 2 3 4 5 6 7 8 9 10
5 msm series 5 watt dc/dc c onverters 27922 dts rev b 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. msm series is a trade- mark of interpoint. copyright ? 2000-2001 interpoint. all rights reserved. 2.00 (50.8) 2.00 (50.8) 0.02 (0.51) 0.00 0.25 0.65 0.95 1.25 1.65 f igure 2: msm s eries o utline d rawing 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. pin spacing tolerance is 0.010 caution maximum reflow temperature for surface mounting the msm converter is 230 c for a maximum of 30 seconds. sn60, 62, or 63 are the recommended types of solder. hand soldering should not exceed 300 c for 10 seconds per pin. note: although every effort has been made to render the case drawings at actual size, variations in the printing process may cause some distortion. please refer to the numerical dimensions for accuracy. 0.312 max. ( 7.92 ) contact information: interpoint headquarters usa phone: 1-800-822-8782 +425-882-3100 email: power@intp.com www.interpoint.com interpoint uk phone: +44-1252-815511 email: poweruk@intp.com interpoint france phone: +33-134285455 email: powerfr@intp.com
6 y our n otes on i nterpoint s n ew p roducts
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