pm-80 shielded drum (lds0705) description ? 125c maximum temperature operation ? 7.8mm x 7.0mm x 5.0mm shielded drum core ? ferrite core material ? metalized core mounting utilizes board space ? inductance range from 0.82h to 470h ? current range from 8.57 amps to 0.368 amps ? frequency range up to 1mhz applications ? buck or boost inductor ? noise filtering and output filter chokes ? battery power, dc-dc converters ? notebook power, pdas, hand held computers ? dvd players ? cellular phones environmental data ? storage temperature range: -40c to +125c ? operating temperature range: -40c to +125c (range is application specific) ? solder reflow temperature: +260c max. for 10 seconds maximum packaging ? supplied in tape and reel packaging, 1000 per reel lds0705 series shielded power inductors part number rated ocl (1) irms(2) isat (3) dcr ( ) k-factor inductance h amperes amperes @20c (4) (h) (typical) lds0705-r82m-r 0.82 0.86120% 7.68 8.57 0.0040 24.8 lds0705-1r5m-r 1.5 1.4220% 6.17 6.67 0.0061 19.3 lds0705-2r2m-r 2.2 2.1320% 5.06 5.45 0.009 15.8 lds0705-3r3m-r 3.3 2.9720% 4.19 4.62 0.013 13.4 lds0705-4r7m-r 4.7 5.0820% 3.32 3.53 0.021 10.2 lds0705-6r8m-r 6.8 6.3420% 3.11 3.16 0.024 9.2 lds0705-8r2m-r 8.2 7.7520% 2.67 2.86 0.033 8.3 LDS0705-100M-R 10.0 9.3020% 2.54 2.61 0.036 7.6 lds0705-150m-r 15.0 14.7820% 2.04 2.07 0.056 6.0 lds0705-220m-r 22.0 21.53 20% 1.66 1.71 0.084 5.0 lds0705-330m-r 33.0 32.5020% 1.48 1.40 0.107 4.0 lds0705-470m-r 47.0 45.7120% 1.21 1.18 0.158 3.4 lds0705-680m-r 68.0 69.7620% 0.985 0.952 0.240 2.8 lds0705-820m-r 82.0 83.6720% 0.850 0.870 0.323 2.5 lds0705-101m-r 100.0 98.920% 0.808 0.800 0.357 2.3 lds0705-151m-r 150.0 152.020% 0.649 0.645 0.554 1.9 lds0705-221m-r 220.0 216.520% 0.584 0.541 0.68 1.6 lds0705-331m-r 330.0 329.920% 0.470 0.438 1.06 1.3 lds0705-471m-r 470.0 467.020% 0.387 0.368 1.56 1.1 (1) open circuit inductance test parameters: 100khz, 0.1v, 0.0adc. (2) irms: dc current for an approximate t of 30c without core loss. derating is necessary for ac currents. pcb layout, trace thickness and width, air-flow, and pro ximity of other heat generating components will affect the temperature rise. it is recommended that the temperature of the part not exceed 125c under worst case operating conditions verified in the end application. (3) isat amperes peak for approximately 15% rolloff (@25c) (4) k-factor: used to determine b p-p for core loss (see graph). b p-p = k*l* i, b p-p(mt), k: (k factor from table), l: (inductance in h), i (peak to peak ripple current in amps). (5) part number definition: lds0705-xxx-r lds0705 = product code and size; -xxx = inductance value in uh; r = decimal point; if no r is present, third character = # of zeros. m = inductance toler ance +/- 20% -r suffix = rohs compliant rohs 2002/95/ec
pm-81 shielded drum (lds0705) lds0705 series shielded power inductors temperature rise vs. watt loss 0 10 20 30 40 50 60 70 80 90 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 total loss (w) temp. rise (c) parts packaged on 13" diameter reel, 1,000 parts per reel. packaging information dimensions are in millimeters. xxx = inductance in uh. r = decimal point. if no r is present third character = # of zeros. wwllyy = date code, r = revision level. recommended pcb layout schematic 2 1 top view xx x wwllyy r side view bottom view 7.00.2 7.80.2 5.0 max. 7.0 3.0 2.0 2.0 typ. mechanical diagrams
pm-82 shielded drum (lds0705) ocl vs. isat 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110% 120% 0% 20% 40% 60% 80% 100% 120% 140% 160% 180% 200% % of isat % o f oc l -40 25 85 inductance characteristics lds0705 series shielded power inductors core loss 1mhz 500khz 300khz 200khz 100khz 50khz 0.0001 0.001 0.01 0.1 1 10 100 1 10 100 1000 bp-p (mt) core loss (w)
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