ZCC3605A 特性 效率高:96% 5一个输出电流 4 v - 20 v VIN范围 集成功率n沟道mosfet (70 35 mΩmΩ顶部和底部) 可调频率800千赫至4 mhz 多相 ®操作(12期) 输出跟踪 0.6 v参考精度±1% 当前模式操作优秀的线和负载 瞬态响应 关机模式吸引不到15µa供应电流 绝对最大VIN ZCC3605: 15 v v绝对最大VIN ZCC3605A: 22 ZCC3605A销是兼容的 ZCC3605 在 24-Pin Available (4mm 4 mm) QFN Package 应用程序 负载点电源 便携式仪器 分布式发电系统 电池驱动的设备 20 v, 5同步降压调节器 描述 ZCC3605A是一种效率高、铁板一块 同步——常识巴克调节器可锁定的使用阶段 准时恒频控制,电流模式 体系结构。多相操作允许多个 ZCC3605A边条——torsto耗尽在使用阶段 最小的输入和输出
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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