USB VBUS ISOURCE Load Switch with Current Limit Control


  • 2.5V to 5.5V Supply Voltage Range at IN
  • 29V Abs. Max. Rating at OUT
    • 80V Surge Protection (IEC61000-4-5)
    • 8kV ESD Contact Discharge (IEC61000-4-2)
    • 15kV ESD Air Gap Discharge (IEC61000-4-2)
  • 35mΩ typ. On-Resistance from IN to OUT
  • Adjustable Current Limit Protection (CLP)
    • 400mA to 3.3A via RISET
  • Over-Current Protection (OCP)
  • Short-Circuit Protection (SCP)
  • “Ideal Diode” Reverse Current Protection (RCP)
  • Over Temperature Protection (OTP)
  • Soft-Start (SS) Limits Inrush Current
  • Fast Turn ON supports USB Fast Role Swap (FRS)
  • Open-Drain FLT Flag
  • Safety approvals
    • UL 2367, file no. E515099
  • -40°C to 85°C Operating Temperature Range
  • 16-bump WLCSP 1.98 x 1.98mm (0.5mm pitch)


  • Notebooks, Ultra-Books, Desktop PCs
  • Smartphones, Tablets, Gaming Consoles
  • Set-Top Box, Networking, any USB ISOURCE Port

Key Electrical Specifications

VIN(Min) VIN(Max) ON Resistance Max Current Package
2.5V 5.5V 35mΩ 3.3A WLCSP44-16 1.98mm x 1.98mm

Typical Application Diagram