6A, 18V, Synchronous Step-Down Converter


Update Alert Share

The RT7243 is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 6A output current from a 4.5V to 18V input supply. The RT7243 current-mode architecture with external compensation allows the transient response to be optimized over a wide range of loads and output capacitors. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. Fault condition protections include output under-voltage protection, output over-voltage protection, and over-temperature protection. The low current shutdown mode provides output disconnection, enabling easy power management in battery-powered systems.


  • High Performance Point of Load Regulation
  • Notebook Computers
  • High Density and Distributed Power Systems
TitleLast UpdateShareDownload
6A, 18V, Synchronous Step-Down Converter2015/04/29
Technical Documents
TitleLast UpdateShareDownload
Richtek Selection Guide [Oct., 2020]2020/12/30
TitleLast UpdateShareViews
How to estimate control loop bandwidth from the transient response time?2017/03/30 1379
Evaluation Boards
TitleLast UpdateShareDownload
RT7243GQW Evaluation Board2021/01/21
Reference Design
TitleLast UpdateShareDownload
Richtek Load Transient Tool2021/01/21
Design Tool
TitleLast UpdateShare
Richtek Designer™ Web Simulation Tool : RT7243GQW2020/09/23
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT7243GQWWQFN3.5x3.5-14A1500 Not available Buy from Distributor