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[???3??w ? tx?3tw????]b;<^m{ x x x n b y j n j d d p n ?a ___________________________________ . " 9
a??? & 7??? xz 7? 7w ??1?t?{ 7 z? ?y? ?`?b{ z? ?vxz7 g "?p? ? w?pp??`?b{ . " 9 xz mw ?|? ? n b y z " . 0 4 ' & 5??????? ?8 tv+ ?wa? ???????a??pb{? a ?xz ?p ? d s{ |?t|?h ?yt| ???a i t? ?b? ?vt?? ?^? ?qo m?b{ . " 9 & 7???xz 7??w z? ?y? ab? h?t?;b?\q?pv?b{fw ?xz 3 5 0 ' ' t|, xw< tk??????? ? 3 t| 3 ? !?`o<^m{ ? ? ___________________________________ ?? ?y c? 7? 7 z? ?y { 7 d! 7? 7 |3??w ? y+?; - a z? ?v " ?p 7 * / 7z 7 0 6 5 7z * 0 6 5 " "z n b y . 0 4 ' & 5??? o ????? * t :7 g l ) [ 5 k ?p??3????? ?? ? ?? a?z?ga? evaluates: max1623 . " 9 a??? ________________________________________________________________ maxim integrated products 1 19-1436; rev 1; 9/99 qty description c1 1 c2 1 c3 1 470pf ceramic capacitor c4 1 c5 1 4.7 f, 16v tantalum capacitor sprague 595d475x0016a2b c6, c7 0 c8 1 l1 1 4.7 h power inductor sumida cdrh125-4r4 or coiltronics up2-4r7 r toff 1 110k ? , 1% resistor r1, r2 0 not installed u1 1 max1623eap (ssop-20) 0.47 f ceramic capacitor 220?, 10v, low-esr tantalum cap sprague 593d227x0010e2w or avx tpse227m010r0100 supplier phone fax avx 803-946-0690 803-626-3123 ? ?y? _____________________________ designation not installed 4.7?, 10v x5r ceramic capacitor taiyo yuden lmk316bj475ml ? ??? _____________________________ j ___________________________________ coiltronics 561-241-7876 561-241-9339 dale-vishay 402-564-3131 402-563-6418 motorola 602-303-5454 602-994-6430 sprague 603-224-1961 603-224-1430 sumida 708-956-0666 708-956-0702 330?, 10v, low-esr tantalum cap kemet t510x337m010as none 2 shunts ju1, ju2 2 3-pin headers none 1 max1623 data sheet taiyo yuden 408-573-4150 408-573-4159 ? gw ? ?y?t ?b?xz . " 9 w?;? ;qoxi^m{ r3 1 10 ? , 5% resistor none 1 max1623 pc board kemet 408-986-0424 408-986-1442 20 ssop ic package temp. range 0? to +70? max1623evkit part evaluates: max1623 . " 9 a??? 2 _______________________________________________________________________________________ ??????? _______________________ . " 9 & 7???x ?? a?z?ga?pb{ ?<w qp, xw ?^?? y`o<^m{ ?ow ? u?b??pz ?o? d ?`smp<^m{ 7 " ?o? 7 * /??t ? `?b{???? ? ( / %??t ? `?b{ ?y-t| ?y k? ? ? 7 0 6 5??t ? `?b{ + 6 w3???ue? tk?\q?? y`?b ?^ { , xw ?o? d ?`oz z? ?yu 7pk?\q? ? y`?b{ fw w z? ?ytmmoxz . " 9 ??? 3??w ? z? ?yw ? r t?????? ? 3 t| 3 w ?|mu ?^?om?b{ ?i ___________________________________ . " 9 a???xz 7? 7 w ?? ?y t?{ 7 z? ?y? ?`?b{ z? ?vx7 g "?pqslom?b{ fw w z? ?y . " 9 & 7???xz z? ?yu 7t'? ? ^?om?b{`t`z, xw ?tk? 3 q 3 p r^??? ? y+??;b?\qt??z z? ?y ? e tb?\q?pv?b{^?tz1lw?? ??? * t :? ??txz 3 5 0 ' ' ?!?b? ?auk? ?b . " 9 ???3??w ?????? * t :w |?w ? ?? {^?tz 3 w? z? ? `o m???? ~ ?`o + 6 w3???? ??bqz . y^x?pb{?????? ? 3 t| 3 w ? rt| z????w ?tmmoxz . " 9 ???3??w ? z? ?yt| z???????? w ? r ?? `o<^m{ ???, xw ? ? ???3??q *?ww ? ?xz? * $w???? t?? ? )w? ut gvx? `?b{? a ???w ? )? ux d n pz ? ?w ?x ? 8pb{ ?? + 6 w; 3?????t?? shunt location fbsel pin max1623 output 1 & 2 connected to vin v out = 2.5v not installed floating v out = 3.3v 2 & 3 connected to gnd adjustable mode ?? + 6 w; ' #w ? r shunt location s s h h d d n n pin max1623 output 2 & 3 connected to vin max1623 enabled, v out = 3.3v 1 & 2 connected to gnd shutdown mode, v out = 0 evaluates: max1623 . " 9 a??? _______________________________________________________________________________________ 3 u1 max1623 lx pgnd l1 4.7 h c2 330 f 10v c1 220 f 10v c8 4.7 f 10v c6 open v in c5 4.7 f 16v c7 open r2 open tie gnd to pgnd at a single location. note: heavy lines denote high switching current paths. v out = 1.10v ( ) r toff 110k , 1% r3 10 ? c3 470pf c4 0.47 f r1 short (pc trace) vin 4.5v to 5.5v vout 3.3v pgnd pgnd fb lx lx lx lx in in v cc toff fbsel 3 5 lx 1 20 18 16 15 17 19 10 8 9 3 1 2 1 2 ju2 3 ju1 7 14 6 4 in 2 13 comp gnd ref 11 12 shdn shdn vin shunt location ju2 pins 1, 2 ju2 not installed (default) ju2 pins 2, 3 connected to vin floating connected to gnd 180 110 270 2.5v 3.3v adjustable output. cut trace between r1 pads. refer to max1623 data sheet for r1 and r2 values. fbsel pin max1623 output r toff (k ? ) (for 300khz) 1 + r1 r2 $ . " 9 & 7???ws? $ evaluates: max1623 . " 9 a??? $ . " 9 & 7???w ? ? ? $ ? ?? $ . " 9 & 7???w ? ? ? $ ???? $ . " 9 & 7???w???, x??? ? ?? $ . " 9 & 7???w???, x??? ???? ?3tpx ? .u?3t a ?p?q^?om?s???ws?w?;tmmox y ??j?d?{s? ?????xt^? om?d?{ ?3tx 5's`ts?t|?7?!?b?vb?-y`?b{ 4 _____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 1999 maxim integrated products is a registered trademark of maxim integrated products. 1.0" 1.0" 1.0" 1.0" ? f? n y s b ? > ?o? ?? 5 & - ' " 9 |
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