page ? no. ? : ? 1/10 ds \ rs6511a \ 05 ??? february, ? 2010 ? www.orister.com rs6511a ? 3a, ? 20v, ? 1.2mhz ? dc/dc ? asynchronous ? step \ down ? converter ? ? ? general ? description ? the ? rs6511a ? is ? a ? high \ efficiency ? asynchronous ? step \ down ? dc/dc ? converter ? that ? can ? deliver ? up ? to ? 3a ? output ? current ? from ? 4.75v ? to ? 20v ? input ? supply. ? the ? rs6511a's ? current ? mode ? architecture ? and ? external ? compensation ? allow ? the ? transient ? response ? to ? be ? optimized ? over ? a ? wide ? range ? of ? loads ? and ? output ? capacitors. ? cycle \ by \ cycle ? current ? limit ? provides ? protection ? against ? shorted ? outputs ? and ? thermal ? shutdown ? protection. ? ? the ? rs6511a ? also ? provides ? output ? under ? voltage ? protection ? and ? thermal ? shutdown ? protection. ? the ? low ? current ? (<30 a) ? shutdown ? mode ? provides ? output ? disconnection, ? enabling ? easy ? power ? management ? in ? battery \ powered ? systems. ? features ? applications ? 3a ? output ? current ? up ? to ? 93% ? efficiency ? integrated ? 100m ? power ? mosfet ? switches ? fixed ? 1.2mhz ? frequency ? cycle \ by \ cycle ? over ? current ? protection ? thermal ? shutdown ? function ? wide ? 4.75v ? to ? 20v ? operating ? input ? range ? output ? adjustable ? from ? 1.23v ? to ? 18v ? programmable ? under ? voltage ? lockout ? available ? in ? an ? sop \ 8 ? with ? exposed ? pad ? package ? rohs ? compliant ? and ? 100% ? lead ? (pb) \ free ? and ? green ? (halogen ? free ? with ? commercial ? standard) ? pc ? motherboard, ? graphic ? card ? lcd ? monitor ? set \ top ? boxes ? dvd \ video ? player ? telecom ? equipment ? adsl ? modem ? printer ? and ? other ? peripheral ? equipment ? microprocessor ? core ? supply ? networking ? power ? supply ? pre \ regulator ? for ? linear ? regulators ? green ? electronics/appliances ? application ? circuits ? ? output on input l1 4.7uh c6 1nf c3 8.2nf r3 5.6k c1 10uf/35v d1 b340a r2 10k ? 1% c2 22uf/6.3v c5 10nf r1 16.9k ? 1% u1 rs6511a \ adse 1 2 3 8 5 4 7 6 bs in sw nc fb gnd en comp ceramic ? x2 4.75v ? to ? 21v ceramic ? x2 off 3.3v/3a ? ? this ? integrated ? circuit ? can ? be ? damaged ? by ? esd. ? orister ? corporation ? recommends ? that ? all ? integrated ? circuits ? be ? handled ? with ? appropriate ? precautions. ? failure ? to ? observe ? proper ? handling ? and ? installation ? procedures ? can ? cause ? damage. ? ? esd ? damage ? can ? range ? from ? subtle ? performance ? degradation ? to ? complete ? device ? failure. ? precision ? integrated ? circuits ? may ? be ? more ? susceptible ? to ? damage ? because ? very ? small ? parametric ? changes ? could ? cause ? the ? device ? not ? to ? meet ? its ? published ? specifications. ?
page ? no. ? : ? 2/10 ds \ rs6511a \ 05 ??? february, ? 2010 ? www.orister.com pin ? assignments ? ? sop \ 8(ep) ? ? ? ? package ? pin ? symbol ? description ? 1 ? bs ? bootstrap. ? this ? capacitor ? (c5) ? is ? needed ? to ? drive ? the ? power ? switch?s ? gate ? above ? the ? supply ? voltage. ? it ? is ? connected ? between ? the ? sw ? and ? bs ? pins ? to ? form ? a ? floating ? supply ? across ? the ? power ? switch ? driver. ? the ? voltage ? across ? c5 ? is ? about ? 5v ? and ? is ? supplied ? by ? the ? internal ? +5v ? supply ? when ? the ? sw ? pin ? voltage ? is ? low. ? 2 ? in ? supply ? voltage. ? the ? rs6511a ? operates ? from ? a ? 4.75v ? to ? 20v ? unregulated ? input. ? c1 ? is ? needed ? to ? prevent ? large ? voltage ? spikes ? from ? appearing ? at ? the ? input. ? 3 ? sw ? power ? switching ? output. ? sw ? is ? the ? switching ? node ? that ? supplies ? power ? to ? the ? output. ? connect ? the ? output ? lc ? filter ? from ? sw ? to ? the ? output ? load. ? note ? that ? a ? capacitor ? is ? required ? from ? sw ? to ? bs ? to ? power ? the ? high \ side ? switch. ? 4, ? 9 ? gnd ? ground. ? note: ? connect ? the ? exposed ? pad ? to ? pin ? 4. ? 5 ? fb ? feedback ? input. ? fb ? senses ? the ? output ? voltage ? and ? regulates ? it. ? drive ? fb ? with ? a ? resistive ? voltage ? divider ? from ? the ? output ? voltage ? to ? ground. ? the ? feedback ? threshold ? is ? 1.23v. ? see ? setting ? the ? output ? voltage. ? 6 ? comp ? compensation ? node. ? comp ? is ? used ? to ? compensate ? the ? regulation ? control ? loop. ? connect ? a ? series ? rc ? network ? from ? comp ? to ? gnd. ? in ? some ? cases, ? an ? additional ? capacitor ? from ? comp ? to ? gnd ? is ? required. ? see ? compensation. ? 7 ? en ? enable ? input. ? en ? is ? a ? digital ? input ? that ? turns ? the ? regulator ? on ? or ? off. ? drive ? en ? high ? to ? turn ? on ? the ? regulator, ? drive ? it ? low ? to ? turn ? it ? off. ? for ? automatic ? startup, ? leave ? en ? unconnected. ? sop \ 8(ep) ? 8 ? nc ? no ? internal ? connection. ? ordering ? information ? device ? device ? code ? rs6511a \ xx ? y ? z ? xx ? is ? nominal ? output ? voltage ? : ? ad ? : ? adj ? y ? is ? package ? & ? pin ? assignments ? designator ? : ? se ? : ? sop \ 8(ep) ? z ? is ? lead ? free ? designator ? : ? p: ? commercial ? standard, ? lead ? (pb) ? free ? and ? phosphorous ? (p) ? free ? package ? g: ? green ? (halogen ? free ? with ? commercial ? standard) ? ?
page ? no. ? : ? 3/10 ds \ rs6511a \ 05 ??? february, ? 2010 ? www.orister.com block ? diagram ? ? absolute ? maximum ? ratings ? symbol ? parameter ? range ? units ? v in ? supply ? voltage ?\ 0.3 ? to ? +21 ? v ? v sw ? sw ? pin ? voltage ?\ 0.3 ? to ? v in ? +0.3 ? v ? v bs ? boot ? strap ? voltage ? v sw ? \ 0.3 ? to ? v sw ? +6 ? v ? v fb ? feedback ? voltage ?\ 0.3 ? to ? +6 ? v ? v en ? enable/uvlo ? voltage ?\ 0.3 ? to ? +6 ? v ? v comp ? comp ? voltage ?\ 0.3 ? to ? +6 ? v ? t j ? junction ? temperature ? 150 ? o c ? t opr ? operating ? temperature ? range ?\ 20 ? to ? +85 ? o c ? t stg ? storage ? temperature ? range ?\ 65 ? to ? +150 ? o c ? t lead ? lead ? temperature ? 260 ? o c ?
page ? no. ? : ? 4/10 ds \ rs6511a \ 05 ??? february, ? 2010 ? www.orister.com electrical ? characteristics ? (v in =12v, ? t a =25c, ? unless ? otherwise ? specified) ? symbol ? parameter ? conditions ? min. ? typ. ? max. unit v in ? input ? voltage ?\? 4.75 ?\? 20 ? v ? v fb ? feedback ? voltage ? 4.75v ?? v in ?? 20v ? 1.19 ? 1.23 ? 1.26 v ? r ds(on)1 ? upper ? switch ? on ? resistance ?\?\? 0.22 ?\? ? r ds(on)2 ? lower ? switch ? on ? resistance ?\?\? 10 ?\? ? i sw ? upper ? switch ? leakage ? v en ? = ? 0v, ? v sw ? = ? 0v ?\?\? 10 ? ua ? i lim ? current ? limit ? (note ? 1) ?\?\? 4.5 ?\? a ? g cs ? current ? sense ? transconductance ? output ? current ? to ? comp ? pin ? voltage ? \? \? 1.95 ?\? a/v ? a vea ? error ? amplifier ? voltage ? gain ?\?\? 400 ?\? v/v ? g ea ? error ? amplifier ? transconductance ?\? 550 ? 830 ? 1150 ua/v f s ? oscillator ? frequency ?\?\? 1.2 ?\? mhz f osc1 ? short ? circuit ? frequency ? v fb ? = ? 0v ?\? 240 ?\? khz ? d max ? maximum ? duty ? cycle ? v fb ? = ? 1.0v ?\? 90 ?\? % ? t on ? minimum ? on ? time ?\?\? 100 ?\? ns ? \? en ? shutdown ? threshold ? i cc 100ua ? 0.7 ? 1.0 ? 1.3 ? v ? \? enable ? pull ? up ? current ? v en ? = ? 0v ?\? 1.0 ?\? ua ? \? en ? uvlo ? threshold ? rising ? v in ? rising ? 2.35 ? 2.50 ? 2.65 v ? \? en ? uvlo ? threshold ? hysteresis ?\?\? 200 ?\? mv ? i sd ? supply ? current ? (shutdown) ? v in ? 0.4v ?\? 23 ? 36 ? ua ? i q ? supply ? current ? (quiescent) ? v en ? 3v ?\? 1.1 ? 1.3 ? ma ? t sd ? thermal ? shutdown ?\?\? 160 ?\? o c ? notes: ? 1. slope ? compensation ? changes ? current ? limit ? above ? 40% ? duty ? cycle. ? 2. stresses ? listed ? as ? the ? above ? "absolute ? maximum ? ratings" ? may ? cause ? permanent ? damage ? to ? the ? device. ? these ? are ? for ? stress ? ratings. ? functional ? operation ? of ? the ? device ? at ? these ? or ? any ? other ? conditions ? beyond ? those ? indicated ? in ? the ? operational ? sections ? of ? the ? specifications ? is ? not ? implied. ? exposure ? to ? absolute ? maximum ? rating ? conditions ? for ? extended ? periods ? may ? remain ? possibility ? to ? affect ? device ? reliability. ? 3. devices ? are ? esd ? sensitive. ? handling ? precaution ? is ? recommended. ? 4. the ? device ? is ? not ? guaranteed ? to ? function ? outside ? its ? operating ? conditions. ? 5. ja ? is ? measured ? in ? the ? natural ? convection ? at ? t a ? = ? 25c ? on ? a ? high ? effective ? four ? layers ? thermal ? conductivity ? test ? board ? of ? jedec ? 51 \ 7 ? thermal ? measurement ? standard. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
page ? no. ? : ? 5/10 ds \ rs6511a \ 05 ??? february, ? 2010 ? www.orister.com detail ? description ? the ? rs6511a ? is ? a ? synchronous ? high ? voltage ? buck ? converter ? that ? can ? support ? the ? input ? voltage ? range ? from ? 4.75v ? to ? 20v ? and ? the ? output ? current ? can ? be ? up ? to ? 3a. ? ? output ? voltage ? setting ? the ? resistive ? divider ? allows ? the ? fb ? pin ? to ? sense ? the ? output ? voltage ? as ? shown ? in ? figure ? 1. ? ? ? ? figure ? 1. ? output ? voltage ? setting ? ? the ? output ? voltage ? is ? set ? by ? an ? external ? resistive ? divider ? according ? to ? the ? following ? equation ? ? ? ? ? ? ? ? + = 2 r 1 r 1 v v fb out ? ? where ? vfb ? is ? the ? feedback ? reference ? voltage ? (1.23v ? typ.). ? ? external ? bootstrap ? diode ? connect ? a ? 10nf ? low ? esr ? ceramic ? capacitor ? between ? the ? boot ? pin ? and ? sw ? pin. ? this ? capacitor ? provides ? the ? gate ? driver ? voltage ? for ? the ? high ? side ? mosfet. ? ? it ? is ? recommended ? to ? add ? an ? external ? bootstrap ? diode ? between ? an ? external ? 5v ? and ? the ? boot ? pin ? for ? efficiency ? improvement ? when ? input ? voltage ? is ? lower ? than ? 5.5v ? or ? duty ? ratio ? is ? higher ? than ? 65%. ? the ? bootstrap ? diode ? can ? be ? a ? low ? cost ? one ? such ? as ? 1n4148 ? or ? bat54. ? ? inductor ? selection ? the ? inductor ? value ? and ? operating ? frequency ? determine ? the ? ripple ? current ? according ? to ? a ? specific ? input ? and ? output ? voltage. ? the ? ripple ? current ? i l ? increases ? with ? higher ? v in ? and ? decreases ? with ? higher ? inductance. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? = in out out l v v 1 l f v i ? ? having ? a ? lower ? ripple ? current ? reduces ? not ? only ? the ? esr ? losses ? in ? the ? output ? capacitors ? but ? also ? the ? output ? voltage ? ripple. ? high ? frequency ? with ? small ? ripple ? current ? can ? achieve ? highest ? efficiency ? operation. ? however, ? it ? requires ? a ? large ? inductor ? to ? achieve ? this ? goal. ? ? for ? the ? ripple ? current ? selection, ? the ? value ? of ? i l ? = ? 0.2375(i max ) ? will ? be ? a ? reasonable ? starting ? point. ? the ? largest ? ripple ? current ? occurs ? at ? the ? highest ? v in . ? to ? guarantee ? that ? the ? ripple ? current ? stays ? below ? the ? specified ? maximum, ? the ? inductor ? value ? should ? be ? chosen ? according ? to ? the ? following ? equation ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? = ) ( ) ( max in out max l out v v 1 i f v l ? ? inductor ? core ? selection ? the ? inductor ? type ? must ? be ? selected ? once ? the ? value ? for ? l ? is ? known. ? generally ? speaking, ? high ? efficiency ? converters ? can ? not ? afford ? the ? core ? loss ? found ? in ? low ? cost ? powdered ? iron ? cores. ? so, ? the ? more ? expensive ? ferrite ? or ? mollypermalloy ? cores ? will ? be ? a ? better ? choice. ? ?
page ? no. ? : ? 6/10 ds \ rs6511a \ 05 ??? february, ? 2010 ? www.orister.com the ? selected ? inductance ? rather ? than ? the ? core ? size ? for ? a ? fixed ? inductor ? value ? is ? the ? key ? for ? actual ? core ? loss. ? as ? the ? inductance ? increases, ? core ? losses ? decrease. ? unfortunately, ? increase ? of ? the ? inductance ? requires ? more ? turns ? of ? wire ? and ? therefore ? the ? copper ? losses ? will ? increase. ? ? ferrite ? designs ? are ? preferred ? at ? high ? switching ? frequency ? due ? to ? the ? characteristics ? of ? very ? low ? core ? losses. ? so, ? design ? goals ? can ? focus ? on ? the ? reduction ? of ? copper ? loss ? and ? the ? saturation ? prevention. ? ? ferrite ? core ? material ? saturates ? ?hard?, ? which ? means ? that ? inductance ? collapses ? abruptly ? when ? the ? peak ? design ? current ? is ? exceeded. ? the ? previous ? situation ? results ? in ? an ? abrupt ? increase ? in ? inductor ? ripple ? current ? and ? consequent ? output ? voltage ? ripple. ? ? do ? not ? allow ? the ? core ? to ? saturate! ? different ? core ? materials ? and ? shapes ? will ? change ? the ? size/ ? current ? and ? price/current ? relationship ? of ? an ? inductor. ? ? toroid ? or ? shielded ? pot ? cores ? in ? ferrite ? or ? permalloy ? materials ? are ? small ? and ? do ? not ? radiate ? energy. ? however, ? they ? are ? usually ? more ? expensive ? than ? the ? similar ? powdered ? iron ? inductors. ? the ? rule ? for ? inductor ? choice ? mainly ? depends ? on ? the ? price ? vs. ? size ? requirement ? and ? any ? radiated ? field/emi ? requirements. ? ? c in ? and ? c out ? selection ? the ? input ? capacitance, ? c in , ? is ? needed ? to ? filter ? the ? trapezoidal ? current ? at ? the ? source ? of ? the ? high ? side ? mosfet. ? to ? prevent ? large ? ripple ? current, ? a ? low ? esr ? input ? capacitor ? sized ? for ? the ? maximum ? rms ? current ? should ? be ? used. ? the ? rms ? current ? is ? given ? by ? ? 1 v v v v i i out in in out max out rms ? ? ? = ) ( ? ? this ? formula ? has ? a ? maximum ? at ? v in ? = ? 2v out , ? where ? i rms ? = ? i out /2. ? this ? simple ? worst \ case ? condition ? is ? commonly ? used ? for ? design ? because ? even ? significant ? deviations ? do ? not ? offer ? much ? relief. ? ? choose ? a ? capacitor ? rated ? at ? a ? higher ? temperature ? than ? required. ? several ? capacitors ? may ? also ? be ? paralleled ? to ? meet ? size ? or ? height ? requirements ? in ? the ? design. ? ? for ? the ? input ? capacitor, ? a ? 10 f ? x ? 2 ? low ? esr ? ceramic ? capacitor ? is ? recommended. ? for ? the ? recommended ? capacitor, ? please ? refer ? to ? table ? 3 ? for ? more ? detail. ? the ? selection ? of ? c out ? is ? determined ? by ? the ? required ? esr ? to ? minimize ? voltage ? ripple. ? ? moreover, ? the ? amount ? of ? bulk ? capacitance ? is ? also ? a ? key ? for ? c out ? selection ? to ? ensure ? that ? the ? control ? loop ? is ? stable. ? loop ? stability ? can ? be ? checked ? by ? viewing ? the ? load ? transient ? response ? as ? described ? in ? a ? later ? section. ? the ? output ? ripple, ? v out ? , ? is ? determined ? by ? ? ? ? ? ? ? ? + ? out l out fc 8 1 esr i v ? ? the ? output ? ripple ? will ? be ? highest ? at ? the ? maximum ? input ? voltage ? since ? i l ? increases ? with ? input ? voltage. ? multiple ? capacitors ? placed ? in ? parallel ? may ? be ? needed ? to ? meet ? the ? esr ? and ? rms ? current ? handling ? requirement. ? dry ? tantalum, ? special ? polymer, ? aluminum ? electrolytic ? and ? ceramic ? capacitors ? are ? all ? available ? in ? surface ? mount ? packages. ? special ? polymer ? capacitors ? offer ? very ? low ? esr ? value. ? however, ? it ? provides ? lower ? capacitance ? density ? than ? other ? types. ? although ? tantalum ? capacitors ? have ? the ? highest ? capacitance ? density, ? it ? is ? important ? to ? only ? use ? types ? that ? pass ? the ? surge ? test ? for ? use ? in ? switching ? power ? supplies. ? aluminum ? electrolytic ? capacitors ? have ? significantly ? higher ? esr. ? however, ? it ? can ? be ? used ? in ? cost \ sensitive ? applications ? for ? ripple ? current ? rating ? and ? long ? term ? reliability ? considerations. ? ceramic ? capacitors ? have ? excellent ? low ? esr ? characteristics ? but ? can ? have ? a ? high ? voltage ? coefficient ? and ? audible ? piezoelectric ? effects. ? the ? high ? q ? of ? ceramic ? capacitors ? with ? trace ? inductance ? can ? also ? lead ? to ? significant ? ringing. ? ? higher ? values, ? lower ? cost ? ceramic ? capacitors ? are ? now ? becoming ? available ? in ? smaller ? case ? sizes. ? their ? high ? ripple ? current, ? high ? voltage ? rating ? and ? low ? esr ? make ? them ? ideal ? for ? switching ? regulator ? applications. ? however, ? care ? must ? be ? taken ? when ? these ? capacitors ? are ? used ? at ? input ? and ? output. ? when ? a ? ceramic ? capacitor ? is ? used ? at ? the ? input ? and ? the ? power ? is ? supplied ? by ? a ? wall ? adapter ? through ? long ? wires, ? a ? load ? step ? at ? the ? output ? can ? induce ? ringing ? at ? the ? input, ? v in . ? at ? best, ? this ? ringing ? can ? couple ? to ? the ? output ? and ? be ? mistaken ? as ? loop ? instability. ? at ? worst, ? a ? sudden ? inrush ? of ? current ? through ? the ? long ? wires ? can ? potentially ? cause ? a ? voltage ? spike ? at ? v in ? large ? enough ? to ? damage ? the ? part. ?
page ? no. ? : ? 7/10 ds \ rs6511a \ 05 ??? february, ? 2010 ? www.orister.com ? output ? rectifier ? diode ? the ? output ? rectifier ? diode ? supplies ? the ? current ? to ? the ? inductor ? when ? the ? high \ side ? switch ? is ? off. ? to ? reduce ? losses ? due ? to ? the ? diode ? forward ? voltage ? and ? recovery ? times, ? use ? a ? schottky ? diode. ? ? choose ? a ? diode ? whose ? maximum ? reverse ? voltage ? rating ? is ? greater ? than ? the ? maximum ? input ? voltage, ? and ? whose ? current ? rating ? is ? greater ? than ? the ? maximum ? load ? current. ? ? choose ? a ? rectifier ? who?s ? maximum ? reverse ? voltage ? rating ? is ? greater ? than ? the ? maximum ? input ? voltage, ? and ? who?s ? current ? rating ? is ? greater ? than ? the ? maximum ? load ? current. ? ? checking ? transient ? response ? the ? regulator ? loop ? response ? can ? be ? checked ? by ? looking ? at ? the ? load ? transient ? response. ? switching ? regulators ? take ? several ? cycles ? to ? respond ? to ? a ? step ? in ? load ? current. ? when ? a ? load ? step ? occurs, ? v out ? immediately ? shifts ? by ? an ? amount ? equal ? to ? i load ? (esr) ? also ? begins ? to ? charge ? or ? discharge ? c out ? generating ? a ? feedback ? error ? signal ? for ? the ? regulator ? to ? return ? v out ? to ? its ? steady \ state ? value. ? during ? this ? recovery ? time, ? v out ? can ? be ? monitored ? for ? overshoot ? or ? ringing ? that ? would ? indicate ? a ? stability ? problem. ? ? ? table ? 1. ? suggested ? inductors ? for ? typical ? application ? circuit ? component ? supplier ? series ? dimensions ? (mm) ? coiltronics ? dr73 \ 4r7 ? 6.0 ? x ? 7.6 ? x ? 3.5 ? maglayers ? msch \ 5750c \ 4r67m ? 5.7 ? x ? 5.0 ? x ? 4.7 ? toko ? a916cy \ 4r7m ? 6.2 ? x ? 6.2 ? x ? 3.5 ? ? ? table ? 2. ? suggested ? capacitors ? for ? c in ? and ? c out ? component ? supplier ? part ? no. ? capacitance ? (uf) ? case ? size ? murata ? grm31cr61e106k ? 10 ? 1206 ? tdk ? c3225x5r1e106k ? 10 ? 1206 ? murata ? grm32er71c226m ? 22 ? 1200 ? tdk ? c3225x5r1c226m ? 22 ? 1200 ? table ? 3. ? schottky ? rectifier ? selection ? guide ? 3a ? load ? current ? v in ? (max.) ? part ? no. ? vendor ? b320 ? diodes, ? inc. ? (www.diodes.com) ? sk33 ? pan ? jit ? international ? (www.panjit.com.tw) ? 20v ? ss32 ? general ? semiconductor ? (www.gensemi.com) ? b330 ? diodes, ? inc. ? (www.diodes.com) ? b340l ? diodes, ? inc. ? (www.diodes.com) ? sk33 ? diodes, ? inc. ? (www.diodes.com) ? mbrd330 ? on ? semiconductor ? (www.onsemi.com) ? 26v ? ss33 ? fairchild ? semiconductor ? (www.fairchildsemi.com) ? general ? semiconductor ? (www.gensemi.com) ? ? ?
page ? no. ? : ? 8/10 ds \ rs6511a \ 05 ??? february, ? 2010 ? www.orister.com sop \ 8(ep) ? dimension ? ? notes: ? a. all ? linear ? dimensions ? are ? in ? millimeters ? (inches). ? b. this ? drawing ? is ? subject ? to ? change ? without ? notice. ? c. body ? length ? does ? not ? include ? mold ? flash, ? protrusions, ? or ? gate ? burrs. ? mold ? flash, ? protrusions, ? or ? gate ? burrs ? shall ? not ? exceed ? 0.006 ? (0.15) ? per ? end. ? d. body ? width ? dimension ? does ? not ? include ? inter \ lead ? flash ? or ? protrusions. ? inter \ lead ? flash ? and ? protrusions ? shall ? not ? exceed ? 0.010 ? (0.25) ? per ? side. ? e. the ? chamfer ? on ? the ? body ? is ? optional. ? if ? it ? is ? not ? present, ? a ? visual ? index ? feature ? must ? be ? located ? within ? the ? cross \ hatched ? area. ? f. lead ? dimension ? is ? the ? length ? of ? terminal ? for ? soldering ? to ? a ? substrate. ? g. the ? lead ? width, ? as ? measured ? 0.014 ? (0.36) ? or ? greater ? above ? the ? seating ? plane, ? shall ? not ? exceed ? a ? maximum ? value ? of ? 0.024 ? (0.61). ? h. lead ? to ? lead ? coplanarity ? shall ? be ? less ? than ? 0.004 ? (0.10) ? form ? seating ? plane. ? i. falls ? within ? jedec ? ms \ 012 ? variation ? aa. ? ? ? ?
page ? no. ? : ? 9/10 ds \ rs6511a \ 05 ??? february, ? 2010 ? www.orister.com soldering ? methods ? for ? orister?s ? products ? 1. ? storage ? environment: ? temperature=10 o c~35 o c ? humidity=65%15% ? 2. ? reflow ? soldering ? of ? surface \ mount ? devices ? ? profile ? feature ? sn \ pb ? eutectic ? assembly ? pb \ free ? assembly ? average ? ramp \ up ? rate ? (t l ? to ? t p ) ? <3 o c/sec ? <3 o c/sec ? preheat ? \? temperature ? min ? (ts min ) ? \? temperature ? max ? (ts max ) ? \? time ? (min ? to ? max) ? (ts) ? ? 100 o c ? 150 o c ? 60~120 ? sec ? ? 150 o c ? 200 o c ? 60~180 ? sec ? tsmax ? to ? t l ? ? \? ramp \ up ? rate ? ? <3 o c/sec ? ? <3 o c/sec ? time ? maintained ? above: ? \? temperature ? (t l ) ? \? time ? (t l ) ? ? 183 o c ? 60~150 ? sec ? ? 207 o c ? 60~150 ? sec ? peak ? temperature ? (t p ) ? 240 o c ? +0/ \ 5 o c ? 260 o c ? +0/ \ 5 o c ? time ? within ? 5 o c ? of ? actual ? peak ? temperature ? (t p ) ? 10~30 ? sec ? 20~40 ? sec ? ramp \ down ? rate ? <6 o c/sec ? <6 o c/sec ? time ? 25 o c ? to ? peak ? temperature ? <6 ? minutes ? <8 ? minutes ? 3. ? flow ? (wave) ? soldering ? (solder ? dipping) ? products ? peak ? temperature ? dipping ? time ? pb ? devices. ? 245 o c ? 5 o c ? 5sec ? 1sec ? pb \ free ? devices. ? 260 o c ? +0/ \ 5 o c ? 5sec ? 1sec ? ? ? ? ? ? figure ? 1: ? temperature ? profile ? t p t l ramp-down ramp-up ts max ts min critical zone t l to t p t s preheat t l t p 25 t 25 o c to peak time temperature
page ? no. ? : ? 10/10 ds \ rs6511a \ 05 ??? february, ? 2010 ? www.orister.com ? ? important ? notice: ? ? ? ? orister ? corporation ? orister ? cannot ? assume ? responsibility ? for ? use ? of ? any ? circuitry ? other ? than ? circuitry ? entirely ? embodied ? in ? an ? orister ? product. ? no ? circuit ? patent ? licenses, ? copyrights, ? mask ? work ? rights, ? or ? other ? intellectual ? property ? rights ? are ? implied. ? ? orister ? reserves ? the ? right ? to ? make ? changes ? to ? their ? products ? or ? specifications ? or ? to ? discontinue ? any ? product ? or ? service ? without ? notice. ? except ? as ? provided ? in ? orister?s ? terms ? and ? conditions ? of ? sale, ? orister ? assumes ? no ? liability ? whatsoever, ? and ? orister ? disclaims ? any ? express ? or ? implied ? warranty ? relating ? to ? the ? sale ? and/or ? use ? of ? orister ? products ? including ? liability ? or ? warranties ? relating ? to ? fitness ? for ? a ? particular ? purpose, ? merchantability, ? or ? infringement ? of ? any ? patent, ? copyright ? or ? other ? intellectual ? property ? right. ? in ? order ? to ? minimize ? risks ? associated ? with ? the ? customer?s ? applications, ? adequate ? design ? and ? operating ? safeguards ? must ? be ? provided ? by ? the ? customer ? to ? minimize ? inherent ? or ? procedural ? hazards. ? testing ? and ? other ? quality ? control ? techniques ? are ? utilized ? to ? the ? extent ? orister ? deems ? necessary ? to ? support ? this ? warranty. ? specific ? testing ? of ? all ? parameters ? of ? each ? device ? is ? not ? necessarily ? performed. ?? ? orister ? and ? the ? orister ? logo ? are ? trademarks ? of ? orister ? corporation. ? all ? other ? brand ? and ? product ? names ? appearing ? in ? this ? document ? are ? registered ? trademarks ? or ? trademarks ? of ? their ? respective ? holders. ? ? ? ?
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