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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. This makes the SC2441A well suited for applications where a low-voltage input (

Features

2-Phase Synchronous Step-down Controllers

◆ 2-Phase Synchronous Continuous Conduction Mode

◆ Out of Phase Operation for Low Input Current Ripple

◆ Operates up to 1MHz Per Channel

◆ Excellent Current Sharing Between Phases

◆ Duty Cycle Up to 90

◆ 0.5V Feedback voltages for Low-Voltage Outputs

◆ Starts into Pre-biased Outputs

◆ Adaptive Shoot-through Protection

◆ Lossless Inductor DCR Current Sensing

◆ 23mV Current-limit Threshold

◆ Individual Soft-start, Overload Hiccup and Enable

Step-up Regulator

◆ 0.27V VCESAT Switch at 0.6A

◆ Fixed frequency Current-mode Control

Common Features

◆ Wide input Voltage Range: 1.8V to 20V

◆ Synchronizing Frequency Equal to that of the Stepdown Converters

◆ 28-lead TSSOP-EDP Lead-free package, fully WEEE and RoHS compliant

Applications

◆ Low voltage distributed DC-DC converters

◆ Telecommunication power supplies

◆ Servers and base stations