SC2441A中文资料1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter数据手册Semtech规格书

描述 Description

The SC2441A is a programmable frequency dual independent or dual/multiple phase single output peak current-mode step-down switching regulator controller. It is capable of operating from 1.8V to 20V input. A 0.6A step-up converter in the SC2441A generates an auxiliary gate drive supply when VIN is below 4.5V.

特性 Features

2-Phase Synchronous Step-down Controllers\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t·2-Phase Synchronous Continuous Conduction Mode
\t\t\t\t\t\t\t\t\t\t\t·Out of Phase Operation for Low Input Current Ripple
\t\t\t\t\t\t\t\t\t\t\t·Operates up to 1MHz Per Channel
\t\t\t\t\t\t\t\t\t\t\t·Excellent Current Sharing Between Phases
\t\t\t\t\t\t\t\t\t\t\t·Duty Cycle Up to 90%
\t\t\t\t\t\t\t\t\t\t\t·0.5V Feedback voltages for Low-Voltage Outputs
\t\t\t\t\t\t\t\t\t\t\t·Starts into Pre-biased Outputs
\t\t\t\t\t\t\t\t\t\t\t·Adaptive Shoot-through Protection
\t\t\t\t\t\t\t\t\t\t\t·Lossless Inductor DCR Current Sensing
\t\t\t\t\t\t\t\t\t\t\t·23mV Current-limit Threshold
\t\t\t\t\t\t\t\t\t\t\t·Individual Soft-start, Overload Hiccup and Enable
\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tStep-up Regulator\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t·0.27V VCESAT Switch at 0.6A
\t\t\t\t\t\t\t\t\t\t\t·Fixed frequency Current-mode Control
\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tCommon Features\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t·Wide input Voltage Range: 1.8V to 20V
\t\t\t\t\t\t\t\t\t\t\t·Synchronizing Frequency Equal to that of the Step-down Converters
\t\t\t\t\t\t\t\t\t\t\t·28-lead TSSOP-EDP Lead-free package, fully WEEE and RoHS compliant

应用 Application

·LowvoltagedistributedDC-DCconverters
·Telecommunicationpowersupplies
·Serversandbasestations