for full details go to www.murata-ps.com/rohs www.murata-ps.com www.murata-ps.com technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 lsn2-t/30-d12 series dosa-sip, 30a pol dc/dc converters mdc_lsn2-t/30-d12 series.b17 page 1 of 17 features standard (dosa compatible) sip package user-selectable outputs: 0.8 to 5vdc 30 amps maximum output current double lead free to rohs standards selectable phased start-up sequencing, tracking and pre-bias operation wide range input voltages 6 to 14vdc to 150w with overtemperature shutdown very high ef? ciency up to 94% fast settling, high di/dt i out slew rate designed to meet ul 60950-1, can/csa- c22.2 60950-1, iec 60950-1, en60950-1 safety approvals extensive self-protection with short circuit hiccup shutdown output overvoltage/overcurrent protection input under and overvoltage shutdown description figure 1. lsn2 -t/30-d12 series simpli? ed schematic typical topology is shown. +input common v track /sequence input pwm controller current sense reference & error amp v cc on/off control v out trim power good output +output 10.5 7 +sense common ? ? only one phase of two is shown. these miniature point-of-load (pol) switching dc/dcs are an ideal regulation and supply element for distributed power and interme- diate bus architectures. the converter is fully compatible with the distributed-power open standards alliance speci? cation (www.dosapower.com). lsn2-t/30-d12 can power cpus, programmable logic and mixed voltage systems with little heat and low noise. a typical application uses a master isolated 12v dc supply and the lsn2-t/30-d12 con- verter for local 1.8v and 3.3v dc supplies. all system isolation resides in the central 48v/12v bus converter supply, leaving lower cost pol regulation right at the load. unlike linear regulators, the lsn2-t/30-d12 can deliver very high power (up to 150w) in a tiny area with no heat sinking and no external components needed. the converter features quick transient response (to 25sec) and very fast current slew rates (to 20a/sec). lsn2-t/30-d12 is an open-frame sip using advanced surface mount (smt) assembly and test techniques. the extraor- dinary performance is achieved with a fully synchronous ? xed-frequency buck topology delivering high ef? ciency, tight line/load regulation, stable no-load operation and no output reverse conduction. output voltage, selected with an external programming resistor or dc volt- age into the trim pin, means oems can stock one model for multiple applications. also included are protection for out-of- limit voltages, currents and temperature. other functions: a remote on/off control, optional power good output, a phased start-up sequence and tracking system, and a load sense input. typical unit $
technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com lsn2-t/30-d12 series dosa-sip, 30a pol dc/dc converters mdc_lsn2-t/30-d12 series.b17 page 2 of 17 part number structure performance specifications and ordering guide ? model ? output input ef? ciency ? package (case/ pinout) v out (volts) i out (amps) power (watts) r/n (mvp-p) ? regulation (max.) ? v in nom. (volts) range ? (volts) i in ? (ma/a) typ. max. line load min. typ. lsn2-t/30-d12-c 0.8-5 30 150 25 50 0.1% 0.1% 12 6-14 200/11.1 93% 94% b13, p71 maximum rated output current in amps non-isolated through-hole output con? guration: l = unipolar low voltage nominal output voltage: 0.8-5 volts l sn2 - / d12 -- t 30 g note: some model number combina- tions may not be available. contact murata power solutions. input voltage range: d12 = 7-14 volts (12v nominal) power good: blank = omitted (default) g = installed (special quantity orders required) rohs-6 hazardous substance compliant ? typical at t a = +25c under nominal line voltage and full-load conditions, unless noted. all models are tested and speci? ed with external 22f tantalum input and output 0.01//0.1//10f capacitors. these capacitors are necessary to accommodate our test equipment and may not be required to achieve speci? ed performance in your applications. see i/o filtering and noise reduction. ? ripple/noise (r/n) is tested/speci? ed over a 20mhz bandwidth for v out > 3.63v and may be reduced with external ? ltering. see i/o filtering and noise reduction for details. ? these devices have no minimum-load requirements and will regulate under no-load conditions. regulation speci? cations describe the output-voltage deviation as the line voltage or load is varied from its nominal/midpoint value to either extreme. ? nominal line voltage, no-load/full-load conditions. ? lsn2-t/30-d12 ef? ciencies are shown at 5v out . ? input range is 6-14v if v out 3.63v. for v out > 3.63v, the input range is 7C14v. ? please refer to the part number structure for additional options when ordering. c murata power solutions recommends the speci? cations below when installing these converters. these speci? cations vary dependin g on the solder type. exceeding these speci? cations may cause damage to the product. be cautious when there is high atmospheric humidity. we strongl y recommend a mild pre-bake (100oc. for 30 minutes). your production environment may differ therefore please thoroughly review these guidelines wi th your process engineers. wave solder operations for through-hole mounted products (thmt) for sn/ag/cu based solders: maximum preheat temperature 115oc. maximum pot temperature 270oc. maximum solder dwell time 7 seconds for sn/pb based solders: maximum preheat temperature 105oc. maximum pot temperature 250oc. maximum solder dwell time 6 seconds soldering guidelines
technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com lsn2-t/30-d12 series dosa-sip, 30a pol dc/dc converters mdc_lsn2-t/30-d12 series.b17 page 3 of 17 power good output (15) con? guration positive-true open drain fet with internal 10 kilohm pullup to +5 vdc operation true (power is okay) = high, approx. 5vdc false (power is not ready) = low, < 1v typ., while dc/dc is powered external sink current 4.5 ma max. (< 1ma is recommended to retain vpg < 1v) false conditions (ord) soft start is active, tracking is active, output is greater than 10% out of regulation, overcurrent, or overtemperature dynamic characteristics dynamic load response 60sec to within 2% of ? nal value (50-100-50% step, di/dt = 20a/msec) start-up time 7ms for v out = nominal (v in on to v out regulated or on/off to v out ) switching frequency 520 50khz environmental calculated mtbf (4) 4, 018, 248 hours operating temperature range C40 to +85c with derating see derating curves operating pc board temperature C40 to +100c max. (12) storage temperature range C55 to +125c thermal protection/shutdown +115c relative humidity to 85c/85% rh, non-condensing physical outline dimensions see mechanical speci? cations weight 0.28 ounces (7.8 grams) electromagnetic interference designed to meet fcc part 15, class b, en55022 (conducted and radiated) (may need external ? lter) safety designed to meet ul/cul 60950-1, csa-c22.2 no.60950-1, iec/en 60950-1 performance/functional speci? cations (1) input input voltage range see ordering guide isolation not isolated. input and output commons are internally connected. start-up voltage 5.5 volts undervoltage shutdown 5.2 volts overvoltage shutdown none re? ected (back) ripple current (2) 20map-p internal input filter type capacitive reverse polarity protection see fuse information input current: full load conditions see ordering guide inrush transient 0.4a 2 sec shutdown mode (off, uv, ot) 5ma output short circuit 60ma no load, 5v out 200ma low line (v in = v min , 5v out ) 18.8 amps remote on/off control: (5) negative logic (no suf? x) on = 0 to +0.5v max. off = +2v min. to +14v max. current 1 ma max. output voltage output range see ordering guide minimum loading no minimum load accuracy (50% load) 1.5% of vnominal voltage adjustment range (13) see ordering guide overvoltage protection none temperature coef? cient 0.02% per c of v out range ripple/noise (20 mhz bandwidth) see ordering guide (8) line/load regulation (see tech. notes) see ordering guide (10) ef? ciency see ordering guide maximum capacitive loading (15) cap-esr = 0.001 to 0.01 5,000f cap-esr > 0.01 10,000f current limit inception 48 amps (cold startup) (98% of v out setting) 42 amps (after warm up) short circuit mode (6) short circuit current output 600ma protection method (14) hiccup autorecovery on overload removal short circuit duration continuous, no damage (output shorted to ground) pre-bias startup (16) converter will start up if the external output voltage is less than v nominal sequencing slew rate 2v max. per millisecond startup delay until sequence start 10 milliseconds tracking accuracy, rising input vout= 200mv of sequence in tracking accuracy, falling input v out = 400mv of sequence in remote sense to v out 0.5v max. (7) absolute maximum ratings input voltage (continuous or transient) +15 volts on/off control 0v min. to + v in max. input reverse polarity protection see fuse section output current (7) current-limited. devices can withstand sustained short circuit without damage. storage temperature C55 to +125c lead temperature see soldering guidelines these are stress ratings. exposure of devices to greater than 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.
technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com lsn2-t/30-d12 series dosa-sip, 30a pol dc/dc converters mdc_lsn2-t/30-d12 series.b17 page 4 of 17 technical notes performance/functional speci? cation notes: i/o filtering and noise reduction all models in the lsn2-t/30-d12 series are tested and speci? ed with external 0.01f, 0.1f, and 10f (all paralleled) ceramic/tantalum output capaci- tors and a 22f tantalum input capacitor. these capacitors are necessary to accommodate our test equipment and may not be required to achieve desired performance in your application. the lsn2-t/30-d12s are designed with high-quality, high-performance internal i/o caps, and will operate within spec in most applications with no additional external components. in particular, the lsn2-t/30-d12s input capacitors are speci? ed for low esr and are fully rated to handle the units input ripple currents. similarly, the internal output capacitors are speci? ed for low esr and full-range frequency response. in critical applications, input/output ripple/noise may be further reduced using ? ltering techniques, the simplest being the installation of external i/o caps. external input capacitors serve primarily as energy-storage devices. they minimize high-frequency variations in input voltage (usually caused by ir drops in conductors leading to the dc/dc) as the switching converter draws pulses of current. input capacitors should be selected for bulk capacitance (at appropri- ate frequencies), low esr, and high rms-ripple-current ratings. the switching nature of modern dc/dcs requires that the dc input voltage source have low ac impedance at the frequencies of interest. highly inductive source impedances can greatly affect system stability. your speci? c system con? guration may necessitate additional considerations. figure 2. measuring input ripple current output ripple/noise (also referred to as periodic and random deviations or pard) may be reduced below speci? ed limits with the installation of additional external output capacitors. output capacitors function as true ? lter elements and should be selected for bulk capacitance, low esr, and appropriate fre- quency response. any scope measurements of pard should be made directly at the dc/dc output pins with scope probe ground less than 0.5" in length. all external capacitors should have appropriate voltage ratings and be located as close to the converters as possible. temperature variations for all relevant parameters should be taken into consideration. # ) . 6 ) . # " 5 3 , " 5 3 # ) . x & |