24V, 3A, 800kHz, ACOTTM Step-Down Converter in 8 Pin TSOT-23


Update Alert Share

The RT6217F is a simple, easy-to-use, 3A synchronous step-down DC-DC converter with an input supply voltage range of 4.5V to 24V. The device build-in an accurate 0.791V reference voltage and integrates low RDS(ON) power MOSFETs to achieve high efficiency in a TSOT-23-8 (FC) package.

The RT6217F adopts Advanced Constant On-Time (ACOT®) 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 RT6217F has MODE Selection function. To connect MODE pin to ground to force the RT6217F into Pulse Skipping Mode for light load efficiency improvement. Pulling the MODE pin high (i.e. > 2V) will force the RT6217F into CCM that helps meet tight voltage regulation accuracy requirements.

The RT6217F 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. An internally soft-start function prevents inrush current during start-up. The device also includes input under-voltage lockout, output under-voltage protection, and over-temperature protection (thermal shutdown) to provide safe and smooth operation in all operating conditions. The RT6217F is offered in a TSOT-23-8 (FC) package.


  • Set Top Box
  • Portable TV
  • Access Point Router
  • DSL Modem
  • LCD TV
TitleLast UpdateShareDownload
24V, 3A, 800kHz, ACOTTM Step-Down Converter in 8 Pin TSOT-232015/11/18
Technical Documents
TitleLast UpdateShareDownload
ACOT™ (Advanced Constant-On Time) Synchronous Step-Down Converters2020/12/30
ACOT® Stability Testing2020/04/13
The Calculation of Output DC Offset for ACOT™ Control Buck Converter with Feed-forward Compensator2019/12/12
Comparing Buck Converter Topologies2019/12/12
Buck Converter Selection Criteria2019/12/12
TitleLast UpdateShareViews
How to estimate control loop bandwidth from the transient response time?2017/03/30 1379