特性 Features

·2-phase synchronous continuous conduction mode for high-efficiency step-down converters
·Out-of-phase operation for low-input current ripples
·Output source and sink currents
·Fixed-frequency peak current-mode control
·75 mV/-110 mV maximum current-sense voltage
·Synthesized MOSFET RDS(ON) current-sensing for low-cost applications
·Optional resistor current-sensing for precise current limit
·Dual outputs or 2-phase single output operation
·Excellent current sharing between individual phases
·Wide input voltage range: 4.7 V to 16 V
·Individual soft-start, overload shutdown and enable
·Duty cycle up to 88%
·0.5 V feedback voltage for low-voltage outputs
·External reference input for DDR applications
·Buffered VDDQ/2 output
·Programmable frequency up to 1 MHz per phase
·External synchronization
·Industrial temperature range
·28-lead TSSOP-EDP package

應(yīng)用 Application

·Telecommunication power supplies
·DDR memory power supplies
·Graphic power supplies
·Servers and base stations

簡介

SC2446屬于集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開關(guān)式控制器。由制造生產(chǎn)的SC2446DC-DC 開關(guān)控制器PMIC（電源管理集成電路）DC 到 DC 開關(guān)式控制器是用于高效率電路的穩(wěn)壓 IC，其配置為生成高于（突升或步升）或低于（突降或步降）輸入電源的輸出電源電壓。其他拓?fù)浣Y(jié)構(gòu)可能包括：降壓-升壓、反激、正激、Cuk、SEPIC、全橋、半橋和推挽式。這些器件不同于需要最小電壓并“燒盡”多余電壓的線性穩(wěn)壓器。