The RT9471/D is a highly-integrated 3A switch mode battery charge management, and system power path management device for single cell Li-Ion and Li-Polymer batteries. The low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time, and extends battery life during the discharging phase. The I2C serial interface with charging and system settings makes the device a truly flexible solution.
The recommended junction temperature range is -40°C to 125°C, and the ambient temperature range is -40°C to 85°C.


  • Smartphones/Tablet PCs
  • Personal Information Appliances
  • Portable Device and Accessory
Key Spec.
RT9471 RT9471D
Status Active Active
Vin (min) (V) 3.9 3.9
Vin (max) (V) 13.5 13.5
Battery Charge Voltage (max) (V) 4.7 4.7
Battery Charge Current (max) (A) 3.15 3.15
Status Indicator Yes No
Charger Type Switching Switching
Input Source AC Adapter;USB AC Adapter;USB
Features Adjustable Current Limit;Current Mode Control;Cycle-by-Cycle Current Limit;I2C;OCP;OVP;Power Good;SCP;UVP Adjustable Current Limit;Current Mode Control;Cycle-by-Cycle Current Limit;I2C;OCP;OVP;SCP;UVP
Package Type WQFN4x4-24 WQFN4x4-24
Built-in Power MOSFETs Yes Yes
  • High Efficiency, 1.5MHz, Synchronous Switch-Mode Buck Charger
    ► 92% Charge Efficiency at 2A with 5V Input and 3.8V Battery
    ► Support 3.9V to 13.5V Input Voltage Range
    ► Average Input Current Regulation (AICR)
    ► Minimum Input Voltage Regulation (MIVR)
    ► Minimum Input Voltage Regulation Track (MIVR Track)
    ► Charge Current Regulation (CCR)
    ► Charge Voltage Regulation (CVR)
    ► Charge Voltage Regulation Track (CVR Track)
    ► Junction Thermal Regulation (JTR)
  • Supports USB On-The-Go (OTG)
    ► 92% Boost Efficiency at 1A with 3.8V Battery and 5.15V Output
    ► OTG Current Limit Regulation (OCLR)
    ► OTG Voltage Limit Regulation (OVLR)
  • Protection
    ► Over-Temperature Protection (OTP)
    ► VBUS Overvoltage Protection (VBUS OVP)
    ► Battery Overvoltage Protection (VBAT OVP)
    ► System Overvoltage Protection (VSYS OVP)
    ► System Undervoltage Protection (VSYS UVP)
    ► System Over-Load Protection (VSYS OLP)
    ► Cycle-by-Cycle Overcurrent Protection (OCP)
    ► OTG Low Battery Protection (OTG LBP)
TitleLast UpdateDownload
3A Single Cell Switching Battery Charger2019/06/25
Technical Documents
TitleItem TypeLast UpdateDownload
Richtek Product Selection Guide [Jan., 2024] Selection Guide2024/01/18
Richtek Featured Product Tree [Aug., 2023] Selection Guide2023/08/07
Power Management for Video Doorbell App. Note2021/10/08
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT9471DGQW(2)WQFN4x4-241500 Request Buy from Distributor
RT9471GQW(2)WQFN4x4-241500 Request Buy from Distributor