The RT9465 is a switch-mode single cell li-Ion/Li-Polymer battery charger for portable applications. It integrates a synchronous PWM controller and high accuracy voltage regulation. Besides, the charging current is regulated through the integrated sensing MOSFET.

The RT9465 optimizes the charging task by using a control algorithm to vary the charge rate via different modes, including fast charge mode and constant voltage mode. The key charge parameters are programmable via the I2C interface. The junction temperature is monitored by ADC.

Other features include under-voltage protection, over- voltage protection (including VBAT and VIN side), thermal regulation and MIVR.

The RT9465 is available in a WQFN-16L 3x3 package.


  • Cellular Telephones
  • Personal Information Appliances
  • Tablet PC, Power Bank
  • Portable Instruments
Key Spec.
Status Active
Vin (min) (V) 3.9
Vin (max) (V) 14
Battery Charge Voltage (max) (V) 5.06
Battery Charge Current (max) (A) 3
Status Indicator No
Charger Type Switching
Input Source USB
Features Adjustable Current Limit;Current Mode Control;Cycle-by-Cycle Current Limit;I2C;OCP;OVP;UVP
Package Type WQFN3x3-16
Built-in Power MOSFETs Yes
  • Input Voltage Range : 3.9V to 14V
  • Synchronous 1.5MHz/0.75MHz Switching Frequency 95% Max. Duty
  • Up to 92%/94% Peak Efficiency at VIN = 9V/5V
  • VIN Over-Voltage Protection : 14.5V
  • VIN Under-Voltage Protection : 3.8V
  • VIN Under-Voltage-Lock-Out : 3.3V
  • Fault Detection (VIN and VBAT Monitoring)
  • Programmable Minimum Input Voltage Range : 3.9V to 13.4V (0.1V/Step)
  • Programmable Battery Voltage Regulation Range : 3.8V to 5.06V (0.02V/Step)
  • Programmable End of Charge Range : 0.6A to 1.6A (0.1A/Step)
  • Programmable Average Output Current Regulation Range : 0.6A to 3A (0.1A/Step)
  • Junction Temperature Monitor : 60°C to 116°C (4°C/Step)
  • VIN Minimum Input Voltage Regulation (MIVR) : ±3%
  • Battery CV (Constant Voltage) Regulation : ±1%
  • Output CC (Constant Current) Regulation, Output Current < 1A : ±100mA (VIN = 9V/12V)
  • Output CC (Constant Current) Regulation, Output Current > 1A : ±10% (VIN = 9V/12V)
  • Junction Temperature Monitor Accuracy : ±3°C
  • Thermal Shutdown : 160°C
TitleLast UpdateDownload
3A Single Cell Li-on Battery Slave Switching Charger2020/10/13
Technical Documents
TitleItem TypeLast UpdateDownload
Richtek Product Selection Guide [Jan., 2024] Selection Guide2024/01/18
Switching Battery Chargers App. Note2017/01/01
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT9465GQWWQFN3x3-161500 Request Buy from Distributor