march ? 4 t h , ? 2011 ??? | ? datasheet ? | ? v3.01 1 IR3550 ? 60a ? integrated ? powirstage ? ? features ? ? peak ? efficiency ? up ? to ? 95% ? at ? 1.2v ? ? integrated ? driver, ? control ? mosfet, ? synchronous ? mosfet ? and ? schottky ? diode ? ? input ? voltage ? (vin) ? range ? up ? to ? 25v ? ? output ? voltage ? range ? from ? 0.25v ? up ? to ? 3.3v ? ? output ? current ? capability ? of ? 60a ? ? operation ? up ? to ? 1.0mhz ? ? integrated ? current ? sense ? amplifier ? ? vcc ? under ? voltage ? lockout ? ? thermal ? flag ? ? body \ braking? ? load ? transient ? support ? ? diode \ emulation ? high ? efficiency ? mode ? ? compatible ? with ? 3.3v ? pwm ? logic ? and ? vcc ? tolerant ? ? compliant ? with ? intel ? drmos ? v4.0 ? ? pcb ? footprint ? compatible ? with ? powirstage ? ? family ? ? efficient ? dual ? sided ? cooling ? ? small ? 6mm ? x ? 6 ? mm ? x ? 0.9mm ? pqfn ? package ? ? lead ? free ? rohs ? compliant ? package ? applications ? ? high ? frequency, ? low ? profile ? dc \ dc ? converters ? ? voltage ? regulators ? for ? cpus, ? gpus, ? and ? ddr ? memory ? arrays ? ? basic ? application ? ? ? figure ? 1: ? IR3550 ? basic ? application ? circuit ? description ? the ? IR3550 ? integrated ? powirstage ? ? is ? a ? synchronous ? buck ? gate ? driver ? ic ? with ? co \ packed ? control ? and ? synchronous ? mosfets ? and ? schottky ? diode. ? it ? is ? optimized ? internally ? for ? pcb ? layout, ? heat ? transfer ? and ? driver/mosfet ? timing. ? custom ? designed ? gate ? driver ? and ? mosfet ? combination ? enables ? higher ? efficiency ? at ? lower ? output ? voltages ? required ? by ? cutting ? edge ? cpu, ? gpu ? and ? ddr ? memory ? designs. ?? up ? to ? 1.0mhz ? switching ? frequency ? enables ? high ? performance ? transient ? response, ? allowing ? miniaturization ? of ? output ? inductors, ? as ? well ? as ? input ? and ? output ? capacitors ? while ? maintaining ? industry ? leading ? efficiency. ? the ? IR3550?s ? superior ? efficiency ? enables ? smallest ? size ? and ? lower ? solution ? cost. ? the ? IR3550 ? pcb ? footprint ? is ? compatible ? with ? powirstage ? ? family. ? integrated ? current ? sense ? amplifier ? achieves ? superior ? current ? sense ? accuracy ? and ? signal ? to ? noise ? ratio ? vs. ? best \ in \ class ? controller ? based ? inductor ? dcr ? sense ? methods. ? the ? IR3550 ? incorporates ? the ? body \ braking ? ? feature ? which ? enables ? reduction ? of ? output ? capacitors ? and ? is ? activated ? quickly. ? synchronous ? diode \ emulation ? mode ? in ? the ? IR3550 ? removes ? the ? zero \ current ? detection ? and ? control ? burden ? from ? the ? pwm ? controller ? and ? increases ? system ? efficiency. ? the ? IR3550 ? is ? optimized ? specifically ? for ? cpu ? core ? power ? delivery ? in ? server ? applications. ? the ? ability ? to ? meet ? the ? stringent ? requirements ? of ? the ? server ? market ? also ? makes ? the ? IR3550 ? ideally ? suited ? to ? powering ? gpu ? and ? ddr ? memory ? designs. ? ? 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 0 5 10 15 20 25 30 35 40 45 50 55 60 65 output current (a) efficiency (% ) ? figure ? 2: ? IR3550 ? efficiency ? www.datasheet.co.kr datasheet pdf - http://www..net/
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