STUSB4531 Hybrid USB PD controller

For fast, universal charging and full feature USB-C SINK ports with minimal firmware effort

Discover STUSB4531 Download presentation

The STUSB4531 is a standalone USB Power Delivery sink controller that simplifies USB‑C charging and data ports in portable consumer, industrial and IoT devices. It autonomously negotiates power contracts - even from a dead battery - and offers an innovative hybrid mode that lets an MCU add advanced USB‑C and accessory features without implementing the full USB‑PD stack. Certified to the latest USB‑C / USB PD revisions and IEC 62680‑1‑3 / 62680‑1‑2:2024, it also helps address EU common‑charger requirements.

portable-printer

Battery charging with USB Data

router

VBUS powered

VAR

Charging with ALT Mode

glucose-meter

Accessories (Vendor Defined Messages)

Why use a common charging port for battery powered devices?

Use cases and application examples

usb-c

Fast charging from any USB-C

Negotiate the best available profile - up to 100 W SPR - without complex firmware.

pos

Shared data + power USB-C port

Implement slim, full feature connectors that combine charging and data on a single port.

smart-oem

Smart OEM accessory ecosystem

Use hybrid mode and VDM to recognize OEM accessories and activate custom functions.

Discover the STUSB4531 hybrid mode

The STUSB4531 combines standalone operation with an optional hybrid mode:

  • Autorun mode
    • Handles power negotiation with the source
    • Dynamically supervises VBUS
    • Manages faults and automatic restart, including dead‑battery start‑up
  • Hybrid mode
    • Runs a hardwired, certified USB‑PD stack inside the device
    • Notifies the MCU by interrupt for advanced PD requests
    • Lets the MCU provide high‑level responses while STUSB4531 manages protocol exchanges


This drastically reduces USB‑PD firmware complexity, while keeping designs flexible and evolutive, including the possibility to implement EPR applications (up to 240 W) with external high‑voltage protection and MCU control.

Learn more about STUSB4531 Get sample

Key features and benefits

  • Certified with the latest USB-C/PD revision
    Ensures high interoperability with USB-C and USB PD devices, while meeting essential EU regulatory requirements for the European market.
  • Advanced power negotiation (Autorun)
    Automatically selects the optimal power profile from the source, including AVS PDO supported by the latest USB PD 3.2 specifications. Autorun mode enables ultra-fast negotiation of maximum power - even from a dead battery - without external software or system boot.
  • Active / dynamic VBUS monitoring
    Continuously adjusts voltage monitoring based on the negotiated power profile. Automated fault management and restart functions provide maximum protection and a seamless user experience.
  • Innovative hybrid architecture
    Enables implementation of advanced features with minimal software effort, eliminating the need for deep technical knowledge of USB-C, USB PD, or cable standards.
  • Compact package options
    Available in small QFN-16 (3 x 3 mm) and CSP-16 (2.3 x 2.3 mm) packages, saving valuable PCB space for slimmer device designs.

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