The RT7274/79/80/81 is a synchronous step-down DC/DC converter with Advanced Constant On-Time (ACOT®) mode control. It achieves high power density to deliver up to 2A 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 capacitor for ensuring performance stabilization. In addition, RT7274/79/80/81 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 include thermal shutdown for RT7274/79/80/81; output under voltage protection and output over voltage protection for RT7279/80 only.


  • 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
TitleLast UpdateDownload
2A, 18V, 700kHz ACOT® Synchronous Step-Down Converter2013/02/25
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT7274GSPPSOP-82500 Request Buy from Distributor
RT7279GCPTSSOP-14(PP)2500 Request Buy from Distributor
RT7279GQWWDFN3x3-101500 Request Buy from Distributor
RT7280GQWWDFN3x3-101500 Not available Not available
RT7281GSPPSOP-82500 Request Buy from Distributor