The RT6268 is a high-efficiency, monolithic asynchronous step-down DC/DC converter that can deliver up to 3.7A output current from a 7V to 36V input supply. The RT6268's current mode architecture with internal compensation is optimized for 5V car charger application over a wide range of loads and output capacitors. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. The RT6268 also provides output over voltage protection output under voltage protection and thermal shutdown protection. The low current (<3μA) shutdown mode provides output disconnect, enabling easy power management in battery-powered systems. The RT6268 is available in a SOP-8 (Exposed Pad) package.


  • USB Power Supplies
  • Automotive Cigarette Lighter Adapters
  • Power Supply for Linear Chargers
  • DC/DC Converters with Current Limited
Key Spec.
Status Active
Vin (min) (V) 7
Vin (max) (V) 36
Number of Outputs 1
Vout (min) (V) 0.8
Vout (max) (V) 5.5
Output Adj. Method Resistor
Iout (max) (A) 3.7
Current Limit (typ) (A) 5.8
Freq (typ) (kHz) 100
Ext Sync No
Ron_HS (typ) (mOhm) 60
Iq (typ) (mA) 0.8
Features Adjustable Current Limit;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Internal Compensation;OCP;OTP;OVP;PSM;Stable with Ceramic Capacitor;UVP
Package Type PSOP-8
  • ±1% High Accuracy Feedback Voltage
  • 7V to 36V Input Voltage Range
  • 3.7A Peak Output Current
  • CC/CV Mode Control
  • Adjustable Load Line Compensation
  • Short Circuit Protection
  • Integrated N-MOSFET Switches
  • Current Mode Control
  • Fixed Frequency Operation : 100kHz
  • Programmable Output Current Limit
  • 60mΩ Internal Power MOSFET Switch
  • Low EMI signature
  • Up to 95% Efficiency
  • Cycle-by-Cycle Over Current Protection
  • Input Under Voltage Lockout
  • Output Under Voltage Protection
  • Thermal Shutdown Protection
TitleLast UpdateDownload
3.7A, 36V, 100kHz Asynchronous Step-Down Converter with Load Line Compensation2015/06/10
Reference Design
TitleLast UpdateDownload
Richtek Load Transient Tool2022/07/25
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT6268GSPPSOP-82500 Request Buy from Distributor