Programmable SMPS and USB Type-C Controller


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The RT7205A is a highly integrated and programmable SMPS controller at the secondary side. It provides the necessary functions and protections for high efficient and high power density off-line AC-DC converter designs. The RT7205A integrates an MCU to handle various proprietary protocols (e.g., FCP, SCP and AFC) through D+/D- interface and also support USB Type-C via CC1/CC2 pins. An internal synchronous rectifier controller can optimize efficiency and provide safe operate in both continuous-conduction mode (CCM) and discontinuous-conduction mode (DCM) even in the condition of a wide output voltage range of 3V to 12V. Dual operational amplifiers with respectively programmable reference voltages are included for voltage-loop and current-loop regulation to provide programmable constant-voltage (CV) and constant-current (CC) regulation in high precision.


  • Travel Adaptors with Fast Charge Protocols (e.g., FCP, SCP and AFC)
  • Travel Adaptors with USB Type-C Control (e.g., 5V/1.5A and 5V/3A)
Key Spec.
RT7205A RT7205AL
Status Active Preview
Policy Manager Integrated Integrated
Alternate Mode No No
MCU Integrated Yes Yes
Power Role Provider Provider
Data Role DFP DFP
External Power Path Control N-MOSFET Driver N-MOSFET Driver
Iq (Typ) (μA) 900 900
Realtime VBUS Monitoring Yes Yes
Max Output Voltage (V) 12 5
Syn. Rectifier Yes Yes
CC Pins 2 2
VBUS Discharge By BLD By BLD
Features Adjustable Current Limit;Constant-Current Regulation;I2C;OCP;OVP;SCP;UVP;VBUS OVP;VBUS UVP Adjustable Current Limit;Constant-Current Regulation;I2C;OCP;OVP;SCP;UVP;VBUS OVP;VBUS UVP
Package Type WQFN4x4-24 WQFN4x4-24
  • Protocols Supported

    ► SCP, FCP, AFC and Proprietary Protocols

    ► USB Type-C

  • Highly Integrated

    ► Embedded MCU with an Mask-ROM of 16kB, an OTP-ROM of 8kB, and an SRAM of 0.75kB

    ► Built-in Synchronous Rectifier Driver and Controller

    ► Built-in Charge Pump for a Wide VDD Operation Range of 3V to 12V

    ► Built-in Shunt Regulator for Programmable Constant-Voltage and Constant-Current Control
    ► Programmable Cable Compensation
    ► BLD Pin for Quick Discharge of Output Capacitor
    ► USBP Pin for Direct Drive of External Blocking
    ► Power-Saving Mode in Standby Mode

  • Protection
    ► Adaptive Over-Voltage Protection
    ► Adaptive Under-Voltage Protection
    ► Firmware-Programmable Over-Current Protection
    ► Firmware-Programmable Over-Temperature Protection