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
Evaluation Boards
TitleLast UpdateDownload
High Efficiency Boost Converter2024/04/18