Description

The SC4614 is a high-speed, voltage mode PWM controller that provides the control and protection features necessary for a synchronous buck converter.

The SC4614 is designed to directly drive the top and bottom MOSFETs of the buck converter. It allows the converter to operate at 500kHz switching frequency with 4V to 25V power rail and as low as 0.5V output. It uses an internal 8.2V supply as the gate drive voltage for minimum driver power loss and MOSFET switching loss.

Features

? 500kHz switching frequency

? 4V to 25V power rails

? 0.5V voltage reference for programmable output voltages

? Internal LDO for optimum gate drive voltage

? 1.5A gate drive current

? Adaptive non-overlapping gate drives provide shoot-through protection for MOSFETs

? Internal soft start

? Hiccup mode short circuit protection

? Power rail under voltage lockout

? MSOP-10 package, fully RoHS and WEEE compliant

Applications

? Embedded, low cost, high efficiency converters

? Point of load power supplies

? Set top box power supplies

? PDP/TFT TVs

? Consumer electronics

SC4614MSTRT屬于集成電路（IC） > PMIC - 穩(wěn)壓器 - DC DC 開關(guān)式控制器。Semtech Corporation制造生產(chǎn)的SC4614MSTRTDC-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。