ZCC3605A　特性　　效率高:96%　　5一個輸出電流　　4 v - 20 v VIN范圍　　集成功率n溝道mosfet　　(70 35 mΩmΩ頂部和底部)　　可調頻率800千赫至4 mhz　　多相　　®操作(12期)　　輸出跟蹤　　0.6 v參考精度±1%　　當前模式操作優秀的線和負載　　瞬態響應　　關機模式吸引不到15µa供應電流　　絕對最大VIN ZCC3605: 15 v　　v絕對最大VIN ZCC3605A: 22　　ZCC3605A銷是兼容的　　ZCC3605　　在 24-Pin Available (4mm 4 ? mm) QFN Package　　應用程序　　負載點電源　　便攜式儀器　　分布式發電系統　　電池驅動的設備　　20 v, 5同步降壓調節器　　描述　　ZCC3605A是一種效率高、鐵板一塊　　同步——常識巴克調節器可鎖定的使用階段　　準時恒頻控制,電流模式　　體系結構。多相操作允許多個　　ZCC3605A邊條——torsto耗盡在使用階段　　最小的輸入和輸出

ZCC3605AFeaTuresHigh Efficiency: Up to 96%5A Output Current4V to 20V VIN RangeIntegrated Power N-Channel MOSFETs(70mΩ Top and 35mΩ Bottom)Adjustable Frequency 800kHz to 4MHzPolyPhase®Operation (Up to 12 Phases)Output Tracking0.6V ±1% Reference AccuracyCurrent Mode Operation for Excellent Line and LoadTransient ResponseShutdown Mode Draws Less Than 15µA Supply CurrentZCC3605: 15V Absolute Maximum VINZCC3605A: 22V Absolute Maximum VINThe ZCC3605A Is Pin Compatible with theZCC3605Available in 24-Pin (4mm ? 4mm) QFN PackageapplicaTionsPoint of Load Power SupplyPortable InstrumentsDistributed Power SystemsBattery-Powered Equipment20V, 5A Synchronous Step-Down RegulatorDescripTionThe ZCC3605A is a high efficiency, monolithicsynchro- nous buck regulator using a phase lockablecontrolled on-time constant frequency, current modearchitecture. PolyPhase operation allows multipleZCC3605A regula- torsto run out of phase while usingminimal input and output capacitance. The operatingsupply voltage range is from 20V down to 4V, making itsuitable for dual, triple or quadruple lithium-ionbattery inputs as well as point of load power supplyapplicationsfrom a 12V or 5V rail. The operating frequency is programmable from 800kHz to4MHzwithanexternalresistor.Thehighfrequency capa- bilityallowstheuseofsmallsurfacemountinductors.Forswitching noise sensitive applications, it can be externallysynchronized from 800kHz to 4MHz. The PHMODE pinallows user control ofthe phase ofthe outgoing clocksignal. The unique constant frequency/controlled on-timearchitectureisidealforhighstep-downratioapplicationsthat are operating at high frequency while demandingfast transient response. Two internal phase-lock loopssynchronize the internal oscillator to the externalclockand also servosthe regulator on-time to lockon toeithertheinternalclockortheexternal clock ifit’spresent. Typical applicaTionHigh Efficiency 1MHz, 5A Step-Down Regulator

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