描述 Description

The SC2446A is a high-frequency dual synchronous stepdown switching power supply controller. It provides out-of-phase output gate signals. The SC2446A operates in synchronous continuous-conduction mode.

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
·50mV/-75mV maximum current sense voltage
·Inductive 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: 4.7V to 16V
·Individual soft-start, overload shutdown and enable
·Duty cycle up to 88%
·0.5V feedback voltage for low-voltage outputs
·External reference input for DDR applications
·Programmable frequency up to 1MHz per phase
·External synchronization
·Industrial temperature range
·28-lead TSSOP lead free package. This product is fully WEEE and RoHS compliant

應(yīng)用 Application

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

簡介

SC2446A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SC2446ADC-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。其他拓撲結(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。