The RT6210 is a 80V, 500mA, 350kHz, high-efficiency, synchronous step-down DC-DC converter with an input-voltage range of 5.2V to 80V and a programmable output-voltage range of 0.8V to 72V. It features current-mode control to simplify external compensation and to optimize transient response with a wide range of inductors and output capacitors. High efficiency can be achieved through integrated N-MOSFETs, and pulse-skipping mode at light loads. With EN pin, power-up sequence can be more flexible and shutdown quiescent current can be reduced to < 3μA.

The RT6210 features cycle-by-cycle current limit for over-current protection against short-circuit outputs, and user-programmable soft-start time to prevent inrush current during startup. It also includes input under-voltage lockout, output under-voltage, and thermal shutdown protection to provide safe and smooth operation in all operating conditions.

The RT6210 is available in the SOP-8 (Exposed pad) package.


  • 4-20mA Loop-Powered Sensors
  • OBD-II Port Power Supplies
  • Low-Power Standby or Bias Voltage Supplies
  • Industrial Process Control, Metering, and Security Systems
  • High-Voltage LDO Replacement
  • Telecommunications Systems
  • Commercial Vehicle Power Supplies
  • General Purpose Wide Input Voltage Regulation
Key Spec.
Status Active
Vin (min) (V) 5.2
Vin (max) (V) 80
Number of Outputs 1
Vout (min) (V) 0.8
Vout (max) (V) 72
Output Adj. Method Resistor
Iout (max) (A) 0.5
Current Limit (typ) (A) 0.86
Freq (typ) (kHz) 350
Ext Sync No
Ron_HS (typ) (mOhm) 660
Ron_LS (typ) (mOhm) 330
Iq (typ) (mA) 0.6
Features Adjustable Soft-Start;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;OTP;PSM;Stable with Ceramic Capacitor;UVP
Package Type PSOP-8
  • 0.8V Feedback Reference Voltage with ±1.5% Accuracy
  • Wide Input Voltage Range : 5.2V to 80V
  • Output Current : 500mA
  • Integrated N-MOSFETs
  • Current-Mode Control
  • Fixed Switching Frequency : 350kHz
  • Programmable Output Voltage : 0.8V to 72V
  • Low < 3μA Shutdown Quiescent Current
  • Up to 92% Efficiency
  • Pulse-Skipping Mode for Light-Load Efficiency
  • Programmable Soft-Start Time
  • Cycle-by-Cycle Current Limit Protection
  • Input Under-Voltage Lockout, Output Under-Voltage and Thermal Shutdown Protection
TitleLast UpdateDownload
500mA, 80V, 350kHz Synchronous Step-Down Converter2017/06/28
Technical Documents
TitleLast UpdateDownload
Richtek Selection Guide [Oct., 2022]2022/10/01
Reference Design
TitleLast UpdateDownload
Richtek Load Transient Tool2022/07/25