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 Induct. Induct. DCR Idc National Semiconductor (µH ± 15%) (Ω Typ.) (µH 15%) (mA) @ Idc @ 0 Adc Chip EPI330552AC4 EPI470552AC4 EPI680302AC4 EPI101302AC4 EPI101342AC4 EPI151202AC4 EPI151272AC4 EPI151302AC4 EPI471102AC4 .027 .042 .061 .093 .125 .144 .188 .191 .754 42 64 78 121 130 173 196 202 493 LM267X-L49 LM267X-L48 LM257X-L68 LM257X-100 LM257X-L43 LM257X-L150 LM259X-L42 LM257X-H150 LM257X-L470 33 47 68 100 100 150 150 150 470 5500 5500 3000 3000 3400 2000 2700 3000 1000 @ Vt1 (mW) Core Loss @ Vt2 @ Vt3 (mW) (mW) --------320 --320 ----- 445 380 --------------- Vt1 (V-µsec) 150 KHz Vt2 (V-µsec) 260 KHz Vt3 (V-µsec) 52 KHz Temp.Rise @ Vt °C (Typ.) --------81.4 --90.7 ----- 36.6 42.4 --------------- ----96.2 96.2 --96.2 --207.7 207.7 34 @ Vt2 42 @ Vt2 24 @ Vt3 28 @ Vt3 44 @ Vt1 24 @ Vt3 43 @ Vt1 55 @ Vt3 27 @ Vt3 ----300 180 --125 --550 213 For no header version : add “V” for Vertical Mount and add “H” for Horizonal Mount Applications CB FB Vin LM267X 8V-40V + Cin 10nF Vsw LX µH Vout + D1 On/Off 7V-40V (60V for HV) Unregulated DC Input Feedback +Vin Cin Vsw + Cout Gnd +5V Regulated Output Load LX Output µH D1 1N5822 + Cout On/Off Gnd Package AC4V Package AC4 Pad Layout Package AC4H Pad Layout .060 Ø (1.52) .400 (10.16) .550 Max. (13.97) .950 Max. (24.13) LM257X .060 Ø (1.52) .950 Max. (24.13) .450 (11.43) .610 Max. (15.49) .950 Max. (24.13) .375 ± .125 (9.53 ± 3.18) .840 (21.34) 1.350 Max. (34.29) Pad Layout .375 ± .125 (9.53 ± 3.18) .400 (10.16) .950 Max. (24.13) .475 (12.07) .110/.150 (2.79/3.81) .450 (11.43) .840 (21.34) .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