LM257X-L43

Thru-Hole Power Inductor ELECTRONICS INC. EPI AC4 Series • Optimized for National’s LM267X,LM259X & LM257X Series • Low loss material ensures operation in high frequency switching converters, such as Buck, Boost or as output averaging filter inductor • 52 KHz, 150 KHz & 260 KH KHz Switching Frequency • Also suitable for use in high quality filter applications • Low Cost Inductor Primary Specification Part Number EPI330552AC4 EPI470552AC4 EPI680302AC4 EPI101302AC4 EPI101342AC4 EPI151202AC4 EPI151272AC4 EPI151302AC4 EPI471102AC4 Induct. Induct. DCR Idc National Semiconductor (µH ± 15%) (Ω Typ.) (µH 15%) (mA) @ Idc @ 0 Adc Chip LM267X-L49 LM267X-L48 LM257X-L68 LM257X-100 LM257X-L43 LM257X-L150 LM259X-L42 LM257X-H150 LM257X-L470 42 64 78 121 130 173 196 202 493 .027 .042 .061 .093 .125 .144 .188 .191 .754 33 47 68 100 100 150 150 150 470 5500 5500 3000 3000 3400 2000 2700 3000 1000 @ Vt1 (mW) --------320 --320 ----Core Loss @ Vt2 @ Vt3 (mW) (mW) 445 380 ------------------300 180 --125 --550 213 Vt1 (V-µsec) 150 KHz --------81.4 --90.7 ----Vt2 (V-µsec) 260 KHz 36.6 42.4 --------------Vt3 (V-µsec) 52 KHz ----96.2 96.2 --96.2 --207.7 207.7 Temp.Rise @ Vt °C (Typ.) 34 @ Vt2 42 @ Vt2 24 @ Vt3 28 @ Vt3 44 @ Vt1 24 @ Vt3 43 @ Vt1 55 @ Vt3 27 @ Vt3 For no header version : add “V” for Vertical Mount and add “H” for Horizonal Mount Applications CB Vin 8V-40V + Cin FB 7V-40V (60V for HV) Unregulated DC Input Feedback +Vin Cin + LM257X Vsw Output D1 1N5822 LX µH + Cout LM267X Vsw 10nF LX µH + Vout Cout +5V Regulated Output Load D1 On/Off Gnd Gnd On/Off Package AC4V Pad Layout .400 (10.16) .060 Ø (1.52) Package AC4 Pad Layout .060 Ø (1.52) .450 (11.43) Package AC4H .950 Max. (24.13) .550 Max. (13.97) .950 Max. (24.13) .950 Max. (24.13) .610 Max. (15.49) .375 ± .125 (9.53 ± 3.18) .840 (21.34) Pad Layout .950 Max. (24.13) .840 (21.34) 1.350 Max. (34.29) .375 ± .125 (9.53 ± 3.18) .400 (10.16) .475 (12.07) .110/.150 (2.79/3.81) .450 (11.43) .060 Ø (1.52) Unless Otherwise Specified Dimensions are in Inches /mm ± .010 /.25 PCA ELECTRONICS, INC. 16799 SCHOENBORN ST. NORTH HILLS, CA 91343 Product performance is limited to specified parameters. Data is subject to change without prior notice. CSIXXXXXXAC4 Rev. 5 2/22/05 FT TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pca.com