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3A, 18V, 700kHz ACOT® Synchronous Step-Down Converter

RT7278

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The RT7278 is a synchronous DC/DC step-down converter with Advanced Constant On-Time (ACOT®) mode control. It achieves high power density to deliver up to 3A output current from a 4.5V to 18V input supply. The proprietary ACOT® mode offers an optimal transient response over a wide range of loads and all kinds of ceramic capacitors, which allows the device to adopt very low ESR output capacitors for ensuring performance stabilization. In addition, RT7278 keeps an excellent constant switching frequency under line and load variation and the integrated synchronous power switches with the ACOT® mode operation provides high efficiency in whole output current load range. Cycle-by-cycle current limit provides an accurate protection by a valley detection of low side MOSFET and external soft-start setting eliminates input current surge during startup. Protection functions also include output under voltage protection, output over voltage protection, and thermal shutdown.

Applications

  • Industrial and Commercial Low Power Systems
  • Computer Peripherals
  • LCD Monitors and TVs
  • Green Electronics/Appliances
  • Point of Load Regulation for High-Performance DSPs, FPGAs, and ASICs
  • LCD TV
Reference Design
TitleLast UpdateShareDownload
Richtek Load Transient Tool2021/01/21
Design Tool
TitleLast UpdateShare
Richtek Designer™ Web Simulation Tool : RT7278GSP2020/09/23
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT7278GSPPSOP-82500 Request Buy from Distributor
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