The RT2702 is a high-efficiency and high-current synchronous buck controller and is compatible with a DrMOS module. RT2702 is a highly integrated chip which merges with COT (Constant-On-Time) PWM controller and PWM signal for DrMOS. Hence, the external circuits for RT2702 are not only easy to design, but component count can be saved as well. For the control topology, the RT2702 adopts FCOT that responds instantly to input voltage change. Besides, the RT2702 includes a 5V (VDRV) linear regulator which can provide 5V voltage and supply up to 100mA for DrMOS. For efficiency or load transient consideration, the RT2702 features two kinds of mode transition functions in light load condition, audio skipping mode (ASM) for better light load efficiency and forced-CCM mode (FCCM) for better load transient performance. For the current sensing application, the RT2702 can support the traditional DCR network current sense from inductor and further the smart power stage (SPS) which provides a current monitor (IMON).

In addition, the RT2702 also includes power good indication, external soft-start setting, soft-off discharge function, precise current sense, enable/disable control, over-voltage protection(OVP), under-voltage protection (UVP), and current limit, thermal shutdown that all are integrated into the WQFN-16L 3x3 package.


  • High Current Distributed Power Systems
  • Datacom and Telecom Systems
  • Industrial Power Supplies
Key Spec.
Status Active
Vin (min) (V) 4.5
Vin (max) (V) 19
Vout (min) (V) 0.6
Vout (max) (V) 3
Output Adj. Method Resistor
Accuracy (+/- %) 1
Freq (min) (kHz) 200
Freq (max) (kHz) 1200
Iq (typ) (mA) 0.8
Ext Sync No
Features Adjustable Current Limit;Adjustable Frequency;Adjustable Soft-Start;COT Control;Cycle-by-Cycle Current Limit;DCR Current Sense;Enable Input;Force PWM;OCP;OVP;Power Good;UVP;Ultrasonic Mode Control
Package Type WQFN3x3-16
  • 4.5V to 19V Input Voltage Range
  • Adjustable Output Range, 0.6V Reference with 1% Accuracy Over-Temperature Protection
  • FCOTTM (Flexible Constant On Time) Control
  • Integrated 5V LDO@100mA for DrMOS module
  • Support Pre-biased Output
  • Programmable Soft-Start
  • Soft-Off through VOUT Discharge
  • Programmable Switching Frequency
  • Programmable Over Current Limit
  • Power Good Indication
  • OVP, UVP, UVLO Protection
  • Support DCR and SPS Current Sense
TitleLast UpdateDownload
Step-Down DC-DC Controller with Remote Sense2017/07/25
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT2702GQWWQFN3x3-161500 Request Buy from Distributor