High Efficiency Boost Converter


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The RT4813 allows systems to take advantage of new battery chemistries that can supply significant energy when the battery voltage is lower than the required voltage for system power ICs. By combining built-in power transistors, synchronous rectification, and low supply current; this IC provides a compact solution for systems using advanced Li-Ion battery chemistries.

The RT4813 is a boost regulator designed to provide a minimum output voltage from a single-cell Li-Ion battery, even when the battery voltage is below system minimum. In boost mode, output voltage regulation is guaranteed to a maximum load current of 3.1A. Quiescent current in Shutdown Mode is less than 2μA, which maximizes battery life.


  • Single-Cell Li-Ion, LiFePO4 Smart-Phones
  • Portable Equipment
Key Spec.
Status Active
Vin (min) (V) 1.8
Vin (max) (V) 5.5
Vout (min) (V) 1.8
Vout (max) (V) 5.5
Output Adj. Method Resistor
Iq (typ) (mA) 0.12
SW Current Limit (typ) (A) 6
Freq (typ) (kHz) 500
Ron (typ) (Ohm) 0.026;0.043
Interface I2C
Features Adjustable Current Limit;Enable Input;Internal Compensation;OCP;OVP;SCP
Package Type UQFN2x2-9(FC)
  • CMCOT Topology and Small Output Ripple when VIN Close VOUT Voltage
  • Operates from a Single Li-ion Cell : 1.8V to 5.5V
  • Adjustable Output Voltage : 1.8V to 5.5V
  • PSM Operation
  • Up to 96% Efficiency
  • Input Over Current Limit
  • Input / Output Over Voltage Protection
  • Programmable Average Output Current Limit Range : 3100mA to 550mA
  • Internal Compensation
  • Output Discharge
  • Output Short Protection
  • True Load Disconnect
Technical Documents
TitleLast UpdateShareDownload
Power Management for Video Doorbell2021/10/08
Power IC Solutions for IoT/Portable/Wearable/Battery-Powered Applications2020/12/30
Richtek Selection Guide [Oct., 2020]2020/12/30
Evaluation Boards
TitleLast UpdateShareDownload
RT4813 High Efficiency Boost Converter2021/01/21
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT4813GQUFUQFN2x2-9(FC)2500 Not available Buy from Distributor