USB Type-C PD and PWM Buck Controller with AnyPower™ and PD Safe® Features


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The RTQ7881-QT is a USB Type-C Power Delivery (USB-C PD) and PWM buck controller with highly integrated functions and the flexibility for USB PD provider applications. The IC has embedded an ARM CortexTM-M0 MCU so as to handle various functions of communication protocol, smart control of the PWM converter, firmware-based protections, and customized functions. The IC features hardware-based protections, such as inductor peak current limit, VBUS over-voltage protection (VBUS OVP), VO under-voltage protection (VO UVP), and VCONN current limit protection, so that the protections have faster responses and can still function properly even when the MCU is not activated. The RTQ7881-QT hereby offers an excellent USB PD solution for a USB-PD Provider application with minimal external components and simple PCB layout.


Key Spec.
Status Active
Policy Manager Integrated
Alternate Mode Yes
PD Version PD2.0;PD3.0
MCU Integrated Yes
Power Role Provider
Data Role Dual Role
External Power Path Control N-MOSFET Driver
Internal Power Path VCONN 5V 400mA
Iq (Typ) (μA) 75
Realtime VBUS Monitoring Yes
Dead Battery Support No
PWM Controller Buck
Max Output Voltage (V) 22
Syn. Rectifier No
CC Pins 2
VBUS Discharge By BLD
Features Adjustable Current Limit;Adjustable Frequency;Adjustable Soft-Start;Constant-Current Regulation;Controller for DCDC Power;Current Mode Control;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Diode Emulation Mode;I2C;OCP;SCP;UVP;VBUS OVP
Package Type WET-WQFN6x6-48
  • Support USB Type-C Power Delivery (PD) Provider Application
  • AEC-Q100 Grade 2 Qualified
  • Operating Ambient Temperature : -40°C to 105°C
  • Type-C, USB PD and Communication Protocols
    ► Compliant with USB PD 3.0 Specification, USB Type-C Cable and Connector Specification 1.2
    ► Alternate Mode and VCONN Output
    ► Support Other Proprietary Communication Protocols through Internal MCU, DP and DM Pins
  • Integrated PWM Buck Controller
    ► Wide Input Voltage Range : 4V to 36V
    ► Peak-Current Mode PWM Operation
    ► Programmable PWM Switching Frequency
    (200kHz to 600kHz)
    ► Pulse-Skipping Mode for Light-Load Efficiency; Selectable Forced CCM Operation
  • AnyPowerTM for Constant Voltage Output (11.7 or 23.4mV/step, typ.) and Constant Current (in 9-Bit Resolution) Output Settings
  • PD Safe®
    ► Adjustable Converter Input Current Limit
    ► Programmable VBUS OVP and VO UVP
    ► Adjustable External OTP
    ► VCONN1/2 Output Current Limit
  • Cable Voltage Drop Compensation for VBUS
  • Master and Slave I2C Interfaces
  • GPIOs for MUX Control or Customized Functions
  • Built-in Output Bleeders for Quick VBUS Discharge
  • Built-in Charge Pump for Driving Cost-Effective N-MOSFETs
  • Available in WET-WQFN-48L 6x6 Package
  • Online Firmware Update via Slave I2C Interface