Description

SC2442 and SC2442H are high performance dual buck converter controllers that can be configured for a variety of synchronous buck applications where efficiency is most important. Both converters are synchronized to prevent beat frequencies. The dual buck converters are also operated out of phase reducing input ripple, allowing for fewer input capacitors.

Features

♦ Dual output controller

♦ Asynchronous start up mode

♦ Power up sequencing to prevent latch-ups

♦ Out of phase operation for low input ripple

♦ Over current protection

♦ Output down to 0.75V

♦ Wide input range, 4.75 to 30V for SC2442 and 4.75 to 36V for SC2442H

♦ Vcc regulator with external PNP transistor

♦ Programmable clock frequency up to 1.1MHz

♦ Two synchronous bucks for high efficiency at high current

♦ –40 to +125 Deg C operating temperature

♦ Small package TSSOP-24

♦ Fully WEEE and RoHS Compliant

Applications

♦ Point of load converter applications

♦ DSL applications with multiple output voltages

♦ Power management for mixed signal applications

♦ Cable modems and set top boxes.

SC2442H属于集成电路（IC） > PMIC - 稳压器 - DC DC 开关式控制器。Semtech Corporation制造生产的SC2442HDC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。