The RT7290A is a synchronous Buck converter with Advanced Constant On-Time (ACOT® ) mode control. The main control loop of the RT7290A uses an ACOT® mode control which provides a very fast transient response with no external compensators. The RT7290A operates from 5V to 23V input voltage, provides a 3.3V LDO and a 300kHz CLK to drive an external charge pump. OCP, UVP and OVP are included in the RT7290A. This IC also provides a 1.5ms internal soft-start function and an open-drain power good indicator.


  • Laptop Computers
  • Tablet PCs
  • Networking Systems
  • Servers
  • Personal Video Recorders
  • Flat Panel Television and Monitors
  • Distributed Power Systems
Key Spec.
Status Active
Vin (min) (V) 5
Vin (max) (V) 23
Number of Outputs 1
Vout (min) (V) 3.267
Vout (max) (V) 3.333
Output Adj. Method Fixed
Iout (max) (A) 6
Current Limit (typ) (A) 9.5
Freq (typ) (kHz) 500
Ext Sync No
Ron_HS (typ) (mOhm) 31
Ron_LS (typ) (mOhm) 20
Iq (typ) (mA) 0.1
Features ACOT Control;Built-in Bootstrap Switch;COT Control;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Enable Input;Fast Transient Response;Internal Compensation;Low Dropout;OCP;OTP;OVP;Power Good;SCP;Stable with Ceramic Capacitor;UVP
Package Type UQFN3x3-16(FC)
  • 5V to 23V Input Voltage Range
  • PWM Frequency Fixed 500kHz
  • ACOT® Mode Performs Fast Transient Response
  • Integrated MOSFETs
    ► 31mΩ of High-Side MOSFET
    ► 20mΩ of Low-Side MOSFET
  • Support Output MLCC Stable
  • Internal Soft-Start (1.5ms typ)
  • Built-in OVP/UVP/OCP
  • Power Good Indicator
  • Fixed 300kHz VCLK to Support Charge Pump
  • Individual EN for PWM and LDO
  • Thermal Shutdown
TitleLast UpdateDownload
6A, 23V, 500kHz, ACOT® Synchronous Buck Converter with LDO for System 3.3V2021/05/12
Reference Design
TitleLast UpdateDownload
Richtek Load Transient Tool2022/07/25
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT7290AGQUFUQFN3x3-16(FC)1500 Request Buy from Distributor