ZCC3605A　特性　　效率高:96%　　5一個(gè)輸出電流　　4 v - 20 v VIN范圍　　集成功率n溝道m(xù)osfet　　(70 35 mΩmΩ頂部和底部)　　可調(diào)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(dāng)前模式操作優(yōu)秀的線和負(fù)載　　瞬態(tài)響應(yīng)　　關(guān)機(jī)模式吸引不到15µa供應(yīng)電流　　絕對(duì)最大VIN ZCC3605: 15 v　　v絕對(duì)最大VIN ZCC3605A: 22　　ZCC3605A銷(xiāo)是兼容的　　ZCC3605　　在 24-Pin Available (4mm 4 ? mm) QFN Package　　應(yīng)用程序　　負(fù)載點(diǎn)電源　　便攜式儀器　　分布式發(fā)電系統(tǒng)　　電池驅(qū)動(dòng)的設(shè)備　　20 v, 5同步降壓調(diào)節(jié)器　　描述　　ZCC3605A是一種效率高、鐵板一塊　　同步——常識(shí)巴克調(diào)節(jié)器可鎖定的使用階段　　準(zhǔn)時(shí)恒頻控制,電流模式　　體系結(jié)構(gòu)。多相操作允許多個(gè)　　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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