器件名称: LTC3874
功能描述: The LTC®3874 is a dual PolyPhase® current mode synchronous step-down slave controller.
文件大小: 536.76KB 共28页
简 介:LTC3874 PolyPhase Step-Down Synchronous Slave Controller with Sub-Milliohm DCR Sensing FEATURES
Phase Extender for High Phase Count Voltage Rails n Accurate Phase-to-Phase Current Sharing n Sub-Milliohm DCR Current Sensing n Phase-Lockable Fixed Frequency 250kHz to 1MHz n Immediate Response to Master IC's Fault n Up to 12 Phase Operation n Wide V Range: 4.5V to 38V IN n V Up to 5.5V OUT n Proprietary Current Mode Control Loop n Programmable CCM/DCM Operation n Programmable Phase Shift Control n Dual N-Channel MOSFET Gate Drivers n28-Lead (4mm × 5mm) QFN Package
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DESCRIPTION
The LTC3874 is a dual PolyPhase current mode synchronous step-down slave controller. It enables high current, multi-phase applications when paired with a companion master controller by extending the phase count. Compatible master controllers include the LTC3866, LTC3875 and LTC3774. The LTC3874 employs a unique architecture that enhances the signal-to-noise ratio of the current sense signal, allowing the use of sub-milliohm DC resistance power inductors to maximize efficiency while reducing switching jitter. Its peak current mode architecture allows for accurate phase to phase current sharing even for dynamic loads. Effectively working with a master controller, the LTC3874 supports all the programmable features as well as fault protection. The constant operating frequency can be synchronized to an external clock or linearly programmed from 250KHz to 1MHz.
L, LT, LTC, LTM, Linear Technology, the Linear l……
