? lsn2 series non-isolated, dosa-sip, 6/10/16a selectable-output dc/dc converters lsn2 series page 1 of 14 www.cd4power.com ordering guide summary model v out range i out range v in range ripple/noise ef? ciency lsn2-t/6-w3 0.75-3.3v 0-6a 2.4-5.5v 15mvp-p 94% lsn2-t/6-d12 0.75-5v 0-6a 8.3-14v 15mvp-p 95% lsn2-t/10-w3 0.75-3.3v 0-10a 2.4-5.5v 15mvp-p 95% lsn2-t/10-d12 0.75-5v 0-10a 8.3-14v 30mvp-p 95% lsn2-t/16-w3 0.75-3.3v 0-16a 2.4-5.5v 25mvp-p 95% lsn2-t/16-d12 0.75-5v 0-16a 8.3-14v 30mvp-p 94% mechanical characteristics 6 amp output models 0.50 x 1.00 x 0.275 inches (12.7 x 25.4 x 6.98 mm) 10 & 16 amp models 0.50 x 2.00 x 0.32 inches (12.7 x 50.8 x 8.13 mm) input characteristics parameter typ. @ 25c, full load notes voltage range 2.4-5.5 or 8.3-14v 5v or 12v nominal models current, full power 4.22 to 11.12a model dependent undervoltage shutdown included with autorestart hysteresis short circuit current 60ma output is short circuited remote on/off control positive or negative polarity default polarity is positive output characteristics parameter typ. @ 25c, full load notes voltage 0.75-3.3 or 0.75-5v user adjustable, model dependent current 0-6, 0-10 or 0-16a three ranges, model dependent power dissipation 20, 33, 52w max. three values, model dependent accuracy 2% of v nom 50% load ripple & noise 15-75mvpp model dependent line and load regulation 0.03% overcurrent protection hiccup autorecovery continuous short circuit protection overtemperature protection +115c shutdown ef? ciency (minimum) 92-93% model dependent ef? ciency (typical) 94-95% model dependent general specifications parameter typ. @ 25c, full load notes transient response 25sec 50% load step to 2% of ? nal value operating temperature range C40 to +85c with 200 lfm air? ow safety ul/iec/en 60950 and csa c22.2-no.234 emi fcc pt.15, class b pb lead-free construction/attach features user-selectable outputs: 0.75-5v (d12 models) or 0.75-3.3v (w3 models) 6, 10 or 16a maximum output current double lead free to rohs standards selectable phased start-up sequencing and tracking wide range v in 8.3-14v or 2.4-5.5v up to 52 watts total output power very high ef? ciency up to 95% starts up into pre-biased load fast settling, high di/dt i out slew rate description these miniature point-of-load (pol) switching dc/dc converters are ideal regulation and supply elements for distributed power and intermedi- ate bus architectures. fully compatible with the distributed-power open standards alliance speci? cation (www.dosapower.com), lsn2s can power cpus, programmable logic and mixed- voltage systems with little heat and low noise. a typical application uses a master isolated 12 or 5vdc supply and individual lsn2 converters for local 1.8 and 3.3vdc supplies. all system isolation resides in the central supply, leaving lower cost pol regulation at the load. the lsn2s can deliver very high power (to 52 watts) in a tiny area with- out heat sinking or external components. they feature quick transient response (to 25sec) and very fast current slew rates (to 20a/sec).
? lsn2 series non-isolated, dosa-sip, 6/10/16a selectable-output dc/dc converters lsn2 series page 2 of 14 www.cd4power.com 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 ? v in nom. (volts) range ? (volts) i in ? (ma/a) typ. max. line load min. typ. lsn2-t/6-w3 0.75-3.3 6 19.8 15 25 0.3% 0.3% 5 2.4-5.5 50/4.22 92% 94% b12, p69 lsn2-t/6-d12 0.75-5 6 19.8 15 25 0.3% 0.3% 12 8.3-14 70/2.69 90% 93% b12, p69 lsn2-t/10-w3 0.75-3.3 10 33.0 15 25 0.3% 0.3% 5 2.4-5.5 50/6.95 93% 95% b11, p68 lsn2-t/10-d12 0.75-5 10 33.0 30 75 0.3% 0.3% 12 8.3-14 100/4.39 93% 95% b11, p68 lsn2-t/16-w3 0.75-3.3 16 52.8 25 50 0.3% 0.3% 5 2.4-5.5 50/11.12 93% 95% b11, p68 lsn2-t/16-d12 ? 0.75-5 16 52.8 30 75 0.3% 0.3% 12 8.3-14 100/7.1 92% 94% b11, p68 maximum rated output current in amps non-isolated smt output con? guration: l = unipolar low voltage nominal output voltage: 0.75-3.3 volts (w3) 0.75-5 volts (d12) l sn2 - / d12 - t 16 n g input voltage range: d12 = 8.3-14 volts (12v nominal) w3 = 2.4-5.5 volts (5v nominal) on/off polarity: blank = positive polarity n = negative polarity power good output: blank = omitted g = installed ? 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 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 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. ? v in must be 0.5v greater than v out . ? lsn2-txx-d12 ef? ciencies are shown at 5v out . note: not all model number combinations are available. contact c&d technologies (datel). c rohs-6 compliant* - *contact c&d technologies (datel) for availability.
? lsn2 series non-isolated, dosa-sip, 6/10/16a selectable-output dc/dc converters lsn2 series page 3 of 14 www.cd4power.com performance/functional speci? cations (1) input input voltage range see ordering guide isolation not isolated, input and output commons are internally connected start-up threshold w3 models 2.2 volts 12v models 8 volts undervoltage shutdown w3 models 2.0 volts 12v models 7.5 volts overvoltage shutdown none re? ected (back) ripple current (2) 10-70map-p (model dependent) internal input filter type capacitive reverse polarity protection see fuse information input current: full load conditions see ordering guide inrush transient 0.1a 2 sec shutdown mode (off, uv, ot) 5ma output short circuit 60ma no load w3 models 50ma 12v models 100ma low line (v in = v min ) lsn2-t/6-w3 5.54 amps lsn2-t/6-d12 3.85 amps lsn2-t/10-w3 9.14 amps lsn2-t/10-d12 6.31 amps lsn2-t/16-w3 14.63 amps lsn2-t/16-d12 10.2 amps remote on/off control: (5) positive logic (no model suf? x) off = ground pin to +0.8v max. on = open pin or +2.5v min. to +v in max. negative logic (n model suf? x) on = open pin to +0.3v max. off = +2.5v min. to +v in max. current 1ma max. output voltage output range see ordering guide minimum loading no minimum load accuracy (50% load) 2% of v nom voltage adjustment range (13) see ordering guide temperature coef? cient 0.02% of v out range per c ripple/noise (20 mhz bandwidth) see ordering guide and (8) line/load regulation (see tech notes) see ordering guide and (10) ef? ciency see ordering guide maximum capacitive loading: (15) lsn2-t/6 models: cap-esr = 0.001 to 0.01 3000f cap-esr >0.01 5000f lsn2-t/10 and -t/16 models: cap-esr = 0.001 to 0.01 5000f cap-esr >0.01 10,000f current limit inception: (98% of v out ) lsn2-t/6 models 11-13 amps (cold startup) 11 amps (after warm up) lsn2-t/10 models 18.75 amps (cold startup) 16.75 amps (after warm up) lsn2-t/16 models 24 amps (cold startup) 21 amps (after warm up) short circuit mode (6) short circuit current output 600ma protection method (17) hiccup autorecovery on overload removal short circuit duration continuous, no damage (output shorted to ground) prebias startup (16) converter will start up if the external output voltage is less than v nom sequencing slew rate 2v max. per millisecond startup delay until sequence start 10 milliseconds tracking accuracy, rising input v out = 100mv of sequence in tracking accuracy, falling input v out = 200mv of sequence in sequence pin input impedance 400k to 1m remote sense to v out 0.5v max. (7) power good output (14) true (ok) = open drain (g suf? x) false (not ok) = signal ground to 0.4v power_good con? guration mosfet to ground with external user pullup, 10ma max. sink dynamic characteristics dynamic load response 25sec to 2% of ? nal value (50-100-50% load step, di/dt = 20a/msec) start-up time 4-7msec for v out = nominal (v in on to v out regulated or on/off to v out ) switching frequency lsn2-t/6 models 315khz lsn2-t/10 and -t/16 models 230khz environmental calculated mtbf (4) tbc hours operating temperature range (ambient) no derating, natural convection C40 to +63c, vertical mount, 2.5v out (9) with derating see derating curves operating pc board temperature C40 to +100c max. (12) storage temperature range C55 to +125c thermal protection/shutdown +115c density altitude 0 to 10,000 feet relative humidity 10% to 90%, non-condensing physical outline dimensions see mechanical speci? cations removable heat shield nylon 46 weight 0.28 ounces (7.8 grams) electromagnetic interference fcc part 15, class b, en55022 (may (conducted and radiated) need external ? lter) safety ul/cul 60950 csa-c22.2 no.234 iec/en 60950 flammability rating ul94v-0 absolute maximum ratings input voltage (continuous or transient) w3 models +7 volts 12v models +15 volts on/off control C0.3v 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 (soldering 10 sec. max.) +280c these are stress ratings. exposure of devices to any of these conditions may adversely affect long-term reliability. proper operation under conditions other than those listed in the perfor- mance/functional speci? cations table is not implied.
figure 1. lsn2 series simpli ed schematic ? lsn2 series non-isolated, dosa-sip, 6/10/16a selectable-output dc/dc converters lsn2 series page 4 of 14 www.cd4power.com performance/functional speci? cation notes: (1) all models are tested and speci? ed with external 1 || 10f ceramic/tantalum output capacitors and a 22f 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. all models are stable and regulate within spec under no-load conditions. general conditions for speci? cations are +25c, v in = nominal, v out = nominal, full load. nomi- nal output voltage is +5v for d12 models and +3.3v for w3 models. (2) input back ripple current is tested and speci? ed over a 5-20mhz bandwidth. input ? ltering is c in = 2 x 100f tantalum, c bus = 1000f electrolytic, l bus = 1h. (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. (4) mean time before failure is calculated using the telcordia (belcore) sr-332 method 1, case 3, ground ? xed conditions, t pcboard = +25c, full output load, natural air convection. (5) the on/off control may be driven with external logic or by applying appropriate external voltages which are referenced to Cinput common. the on/off control input should use either an open collector/open drain transistor or logic gate which does not exceed +v in . a 68k external pullup resistor to +v in will cause the on state for negative logic models. (6) short circuit shutdown begins when the output voltage under increasing load degrades approxi- mately 2% from the selected setting. (7) if sense is connected remotely at the load, up to 0.5 volts difference is allowed between the sense and +v out pins to compensate for ohmic voltage drop in the power lines. a larger voltage drop may cause the converter to exceed maximum power dissipation. i/o filtering and noise reduction all models in the lsn2 series are tested and speci? ed with external 1 || 10f ceramic/tantalum output capacitors and a 22f tantalum input capacitor. these capacitors are necessary to accommodate our test equip- ment and may not be required to achieve desired performance in your appli- cation. the lsn2's 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's input capacitors are speci? ed for low esr and are fully rated to handle the units' input ripple currents. similarly, the internal technical notes (8) output noise may be further reduced by adding an external ? lter. see i/o filtering and noise reduction. (9) all models are fully operational and meet published speci? cations, including cold start at C40c. v out is nominal. (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 are available under scheduled quantity special order. (12) maximum pc board temperature is measured with the sensor in the center. (13) do not exceed maximum power speci? cations when adjusting the output trim. (14) when sequencing is not used, the power good output is true at any time the output is within approximately 10% of the voltage set point. power good basically indicates if the converter is in regulation. power good detects over temperature if the pwm has shut down due to ot. power good does not directly detect over current. if sequencing is in progress, power good will falsely indicate true (valid) before the output reaches its setpoint. ignore power good if sequencing is in transition. (15) the maximum output capacitive loads depend on the the equivalent series resistance (esr) of the external output capacitor. (16) do not use pre-bias startup and sequencing together. see technical notes below. (17) after short circuit shutdown, if the load is partially removed such that the load still exceeds the overcurrent (oc) detection, the converter will remain in hiccup restart mode. (18) for best noise performance, leave the track/sequence pin open when not used. 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 appropriate frequencies), low esr, and high rms-ripple-current ratings. the switching nature of modern dc/dc's 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. ) . 0 5 4 # / - - / . 6 4 2 ! # + ) . 0 5 4 0 7 - # / . 4 2 / , , % 2 # 5 2 2 % . 4 3 % . 3 % 2 % & |