SY20802UGC - Over Voltage Protection Switch with Current Monitor


  • Wide Input Voltage Range from 3V to 18V
  • Up to 25V Voltage Rating for OUT Pin
  • Extremely Low on Resistance RDS(ON)

RDS(ON)=45mΩ(typ.) at 12V VIN condition

  • Reverse Blocking Function
  • 3A Output Current Capability
  • Programmable Current Limit
  • Short-circuit Protection
  • Thermal Shutdown Protection & Auto Recovery
  • RoHS Compliant and Halogen Free
  • Compact Package: CSP1.50mm×1.64mm -12

Typical Application


The SY20802 is an over voltage protection switch with 3A capability to prevent damage to the upstream system with low voltage rating. It achieves input voltage range from 3V to 18V. Programmable OVP is available with simple external resistor divider. Integrated reverse blocking FET prevents the leakage current from output side to input side when the input power supply is removed, but without output discharging. Extremely low on resistance RDS(ON) helps to reduce power loss during the normal operation. Enable control is available to cut off the energy path. High accuracy current indicator is employed internally. It integrates the over temperature protection shutdown and auto-recovery with hysteresis to protect against over current events.


  • Wireless Charger
  • USB PD