The RTQ2115A combines a charging port controller, USB 2.0 high-speed data line (D+/D-) switch and a 3A synchronous buck converter.

The RTQ2115A provides the electrical signatures on D+/D- to support charging schemes compatible with the USB 2.0 Battery Charging Specification BC1.2 and Chinese Telecommunication Industry Standard YD/T 1591-2009. Auto-detect mode is also integrated which supports USB 2.0 Battery Charging Specifica­tion BC1.2 Dedicated Charging Port (DCP), Divider 3 mode and 1.2V shorted mode to comply with the legacy fast charging mode of mobile devices.

The RTQ2115A integrates a high efficiency, monolithic synchronous buck converter that can deliver up to 3A output current from a 3V to 36V wide range input supply and is protected from load-dump transients up to 42V.

The RTQ2115A has constant current control to achieve adjustable USB current limit and implement the current sense signal for adjustable USB power output voltage with load line compensation. The converter includes optional spread-spectrum frequency modulation to overcome EMI issue and complete protection for safe and smooth operation in all applied conditions. Protection features include cycle-by-cycle current limit for protection against shorted outputs, soft-start control to eliminate input current surge during start-up, input under-voltage lockout, output under-voltage protection, output over-voltage protection and over-temperature protection. The RTQ2115A can be used to support Type-A connector.

The RTQ2115A is fully specified over the temperature range of TJ = -40ºC to 125ºC and available in WET-WQFN-32L 5x5.


  • Automotive Car Chargers
  • USB Power Chargers
Key Spec.
Status Active
MCU Integrated No
Power Role Provider
Data Role DFP
Iq (Typ) (μA) 150
Features AEC-Q100;Adjustable Current Limit;Adjustable Frequency;Adjustable Soft-Start;Constant-Current Regulation;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;External Synchronization;OCP;Power Good;SCP;UVP;VBUS OVP;VBUS UVP
Package Type WET-WQFN5x5-32
  • USB Charging Port Controller
    ► Support D+/D- SDP/CDP/DCP Modes per USB BC1.2
    ► Support D+/D- Shorted Mode per Chinese Telecommunication Industry Standard YD/T 1591-2009
    ► Support Automatic Selection Mode for D+/D- Shorted / Divider 3 / 1.2V Mode
  • 36V 3A Synchronous Buck Converter
    ► 3V to 36V Input Voltage Range
    ► 3A Continuous Output Current
    ► CC/CV Mode Control
    ► Adjustable and Synchronizable Switching Frequency : 300kHz to 2.2MHz
    ► Selectable PSM/PWM at Light Load
    ► Adjustable Soft-Start
    ► Adjustable USB Power Output Voltage between 5V and 6V with Load Line Compensation
    ► Optional Spread-Spectrum Frequency Modulation for EMI Reduction
  • Power Good Indicator
  • Enable Control
  • USB 2.0 480Mbps Data Switches
  • Support Mode Change Among SDP/CDP/DCP Auto
  • ±8kV HBM on DS+/DS-
  • Over-Temperature Protection
  • Cycle-by-Cycle Over-Current Limit Protection
  • Input Under-Voltage Protection
  • Adjacent Pin-Short Protection
  • AEC-Q100 Grade 1 Qualified
  • -40ºC to 125ºC Operating Ambient Temperature
  • DS+/DS- OVP
TitleLast UpdateDownload
Charging Port Controller and Integrated 36V 3A Synchronous Buck Converter2019/05/16
Technical Documents
TitleLast UpdateDownload
Richtek Selection Guide [Oct., 2022]2022/10/01
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RTQ2115AGQWT-QAWET-WQFN5x5-321500 Request Buy from Distributor