SY6863B4ABC - 5.5V, 3A Low Loss Power Distribution Switch with Reverse Block Rating Up to 28V


  • Input Voltage: 2.5V to 5.5V
  • Output Voltage Withstanding 28V
  • Extremely Low Power Path Resistance: 45mΩ (typ.)
  • 3A Load Current Capability
  • Reverse Blocking in Normal Operation or Shutdown
  • Fault Flag (OCB) Output For Over Current and Fault Conditions
  • Fast Role Swap Support
  • Compact Package: SOT23-6
  • RoHS Compliant and Halogen Free
  • CB Test certification NO. : DK-64454-A1-UL

Typical Application


The SY6863B4 is an ultra-low RDS(ON), 3A Low Loss power distribution switch with current limit to protect the power source from over current and short circuit conditions.

The SY6863B4 has over voltage protection and the output pin can withstand 28V. It incorporates the over-temperature protection and reverse blocking functions.

The SY6863B4 supports USB PD3.0 fast role swap. The output voltage can recover to USB valid voltage range within 110µs during USB PD fast role swap event.


  • USB 3.1 Application
  • USB 3G Datacard
  • USB Dongle
  • Mini PCI Accessories
  • USB Charger
  • Public Place Multi-USB Charger