key features: ? 5w output power ? wide 4:1 inputs ? miniature smt case ? tight line/load regulation ? 1,500 vdc isolation ? -40oc to +71oc operation ? 14 standard models ? 1.0 mh mtbf minimum ? industry standard pin-out lf500ru very wide input, 5w smt single & dual output dc/dc con vert ers series electrical speci cations speci cations typical @ +25?, nominal input voltage & rated output current, unless otherwise noted. speci cations subject to change without notice. input parameter conditions min. typ. max. units input start voltage 24 vdc input 7.0 8.0 9.0 vdc 48 vdc input 14.0 16.0 18.0 reverse polarity input current 1.0 a short circuit input power 1,000 3,000 mw input filter (pi) filter (meets en55022 class a) output parameter conditions min. typ. max. units output voltage accuracy 0.5 2.0 % output voltage balance dual output, balanced load 0.5 3.0 % line regulation for vin = min to max 0.2 1.0 % load regulation iout = 10% to 100% 0.3 1.0 % ripple & noise (20 mhz) see note 1 50 85 mv p - p ripple & noise (20 mhz) 100 mv p - p ripple & noise (20 mhz) 15 mv rms output power protection 115 % transient response time, see note 2 25% load step change 250 500 s transient response deviation 2 6 % temperature coef? cient 0.01 0.02 %/ o c output short circuit continuous (autorecovery) general parameter conditions min. typ. max. units isolation voltage 60 seconds 1,500 vdc isolation resistance 1,000 vdc 1,000 m? isolation capacitance 100 khz, 1v 650 750 pf switching frequency 340 khz environmental parameter conditions min. typ. max. units operating temperature range ambient -40 +25 +71 o c operating temperature range case +90 o c storage temperature range -40 +125 o c cooling free air convection humidity rh, non-condensing 95 % physical case size 1.31 x 0.81 x 0.40 inches (33.4 x 20.6 x 10.2 mm) case material non-conductive black plastic (ul94-v0) weight 0.49 oz (14g) reliability speci? cations parameter conditions min. typ. max. units mtbf mil hdbk 217f, 25 o c, gnd benign 1.0 mhours absolute maximum ratings parameter conditions min. typ. max. units input voltage surge (1 sec) 24 vdc input -0.7 50.0 vdc 48 vdc input -0.7 100.0 lead temperature 1.5 mm from case for 10 sec. 260 oc internal power dissipation all models 2,500 mw caution: exceeding absolute maximum ratings may damage the module. these are not continuous operating ratings. www.micropowerdirect.com micropower direct 292 page street suite d stoughton, ma 02072 usa t: (781) 344-8226 f: (781) 344-8481 e: sales@micropowerdirect.com w: www.micropowerdirect.com http://
derating curve board layout pin connections pin single dual 1 on/off on/off 2 -vin -vin 3 -vin -vin 9 nc common 10 nc nc 11 nc -vout 12 nc nc 13 nc nc 14 +vout +vout 15 nc nc 16 -vout common 22 +vin +vin 23 +vin +vin 24 nc nc nc: no connection model number input output re ected ripple cur. (ma) ef ciency (%, typ) fuse rating slow-blow (ma) voltage (vdc) current (ma) voltage (vdc) current (ma, max) current (ma, min) nominal range full-load no-load lf501ru 24 9.0 - 36.0 217 20 3.3 1,200 120.0 15 76 1,500 lf502ru 24 9.0 - 36.0 260 20 5.0 1,000 100.0 15 80 1,500 lf503ru 24 9.0 - 36.0 251 20 12.0 417 41.7 15 83 1,500 lf504ru 24 9.0 - 36.0 251 20 15.0 333 33.3 15 83 1,500 lf505ru 24 9.0 - 36.0 260 20 5.0 500 50.0 15 80 1,500 lf506ru 24 9.0 - 36.0 251 20 12.0 208 20.8 15 83 1,500 lf507ru 24 9.0 - 36.0 252 20 15.0 167 16.7 15 83 1,500 lf511ru 48 18.0 - 75.0 109 10 3.3 1,200 120.0 10 76 700 lf512ru 48 18.0 - 75.0 130 10 5.0 1,000 100.0 10 80 700 lf513ru 48 18.0 - 75.0 126 10 12.0 417 41.7 10 83 700 LF514RU 48 18.0 - 75.0 125 10 15.0 333 33.3 10 83 700 lf515ru 48 18.0 - 75.0 130 10 5.0 500 50.0 10 80 700 lf516ru 48 18.0 - 75.0 125 10 12.0 208 20.8 10 83 700 lf517ru 48 18.0 - 75.0 126 10 15.0 167 16.7 10 83 700 www.micropowerdirect.com micropower direct we power your success - for less! 292 page street ste d stoughton, ma 02072 ? tel: (781) 344-8226 ? fax: (781) 344-8481 ? e-mail: sales@micropowerdirect.com model selection guide mechanical dimensions notes: 1. when measuring output ripple, it is recommended that an external 0.47 f ceramic capacitor be placed from the +vout pin to the -vout pin for single output units and from each output to common for dual output units. for noise sensitive applications, the use of 3.3 f capacitors will reduce the output ripple. 2. transient recovery is measured to within a 1% error band for a load step change of 75% to 100%. 3. no-load operation will not damage these units, however, they may not meet speci cations. 4. dual output units may provide a 10v, 24v or 30v output. to do this, connect the load across the positive (+vout) and negative (-vout) outputs and oat the output common. 5. the converter should be connected to a low ac-impedance source. an input source with a highly inductive imped- ance may affect the stability of the converter. in applications where the converter output loading is high and input power is supplied over long lines, it may be necessary to use a capacitor on the input to insure start-up. in this case, it is recommended that a low esr (esr <1.0 ? at 100 khz) capacitor be mounted close to the converter. for 24v input units a 4.7 f is recommended, and for 48v units a 2.2 f. 6. maximum capacitive load for 3.3v & 5v units is 2,000 f, for 12v units 470 f, for 15v & ?2v units 330 f, for ?v units 680 f, and for ?5v units 220 f. 7. it is recommended that a fuse be used on the input of a power supply for protection. see the table above for the correct rating. remote on/off notes: 1. maximum sink current at the on/off pin (pin 1) during a logic low is 300 a. 2. maximum allowable leakage current of a switch connected to the on/off terminal (pin 1) at logic high (2.5v to 100v) is 200 a. parameter condition units supply on 2.5 to 5.5 or open circuit vdc supply off -0.7 to 0.8 vdc standby input current 10 ma control common referenced to negative input (-vin) remote on/off notes: all dimensions are typical in inches (mm) tolerance x.xx = 0.01 ( 0.25) pin 1 is marked by a ?ot or indentation on the unit http://
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