18V, 10A, 500kHz ACOTTM Synchronous Step-Down Converter


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The RT6250A/B is a simple, easy-to-use, 10A synchronous step-down DC-DC converter with an input supply voltage range of 4.5V to 18V. The device build-in an accurate 0.6V reference voltage and integrates low RDS(ON) power MOSFETs to achieve high efficiency in a UQFN-12HL 3x3 package. The RT6250A/B adopts Advanced Constant On-Time (ACOTTM) control architecture to provide an ultrafast transient response with few external components and to operate in nearly constant switching frequency over the line, load, and output voltage range. The RT6250A/B operates in automatic PSM that maintains high efficiency during light load operation. The RT6250A/B operates in Forced PWM that helps meet tight voltage regulation accuracy requirements. The RT6250A/B senses both FETs current for a robust over-current protection. It features cycle-by-cycle current limit protection and prevent the device from the catastrophic damage in output short circuit, over current or inductor saturation. A built-in soft-start function prevents inrush current during start-up. The device also includes input under-voltage lockout, output under-voltage protection, over-voltage protection, and over-temperature protection (thermal shutdown) to provide safe and smooth operation in all operating conditions. The RT6250A/B is offered in a UQFN-12HL 3x3 (FC) package.


  • 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
  • Networking Communication
TitleLast UpdateShareDownload
18V, 10A, 500kHz ACOTTM Synchronous Step-Down Converter2017/11/01
Evaluation Boards
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RT6250BHGQUF Step-Down Converter Evaluation Board2017/12/13
Reference Design
TitleLast UpdateShareDownload
Richtek Load Transient Tool2017/03/31
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT6250BHGQUFUQFN3x3-12H(FC)1500 Not available Buy from Distributor