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[供应] 5A输出同步降压ZCC3605A替代LTC3605A

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发表于 2021-9-24 14:11:00 | 显示全部楼层 |阅读模式
5A输出同步降压ZCC3605A替代LTC3605A
The ZCC3605A is a highefficiency, monolithic synchro- nous buck regulator using a phase lockablecontrolled on-time constant frequency, current mode architecture. PolyPhaseoperation allows multiple ZCC3605A regula- torsto run out of phase while usingminimal input and output capacitance. The operating supply voltage range isfrom 20V down to 4V, making it suitable for dual, triple or quadruplelithium-ion battery inputs as well as point of load power supplyapplicationsfrom a 12V or 5V rail. The operating frequency is programmable from800kHz to 4MHzwithanexternalresistor.Thehighfrequency capa-bilityallowstheuseofsmallsurfacemountinductors.For switching noise sensitiveapplications, it can be externally synchronized from 800kHz to 4MHz. The PHMODEpin allows user control ofthe phase ofthe outgoing clock signal. The uniqueconstant frequency/controlled on-timearchitectureisidealforhighstep-downratioapplications that are operating at highfrequency while demanding fast transient response. Two internal phase-lockloops synchronize the internal oscillator to the externalclock and alsoservosthe regulator on-time to lockon toeither theinternalclockortheexternalclock ifit’spresent.
FeaTures
nHigh Efficiency: Up to 96%
n 5AOutput Current
n 4Vto 20V VIN Range
nIntegrated Power N-Channel MOSFETs
(70mΩTop and 35mΩ Bottom)
nAdjustable Frequency 800kHz to 4MHz
nPolyPhaseOperation (Up to 12 Phases)
nOutput Tracking
n0.6V ±1% Reference Accuracy
nCurrent Mode Operation for Excellent Line and Load
TransientResponse
nShutdown Mode Draws Less Than 15μA Supply Current
nZCC3605: 15V Absolute Maximum VIN
nZCC3605A: 22V Absolute Maximum VIN
n TheZCC3605A Is Pin Compatible with the ZCC3605
nAvailable in 24-Pin (4mm ′ 4mm) QFN Package

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