SY8641 - 2-5Vin, PMIC


  • 2-5V input voltage range
  • Synchronous Boost converter
  • True shutdown function
  • Output voltage range: VIN to 15V
  • Low output ripple: <500mVP-P at 10VOUT
  • >80% efficiency at light load of 2mA
  • Maximum output current: 20mA
  • Internal softstart with inrush current limiting
  • Fast discharge circuit after shutdown for SPDT switches output
  • 1uA shutdown current
  • Input UVLO
  • Over temperature protection
  • RoHS Compliant and Halogen Free
  • Compact package: QFN3x3-16


SY8641 integrates a high-efficiency synchronous boost converter, four single-pole double-throw (SPDT) switches. SY8641 operates over an input voltage range from 2V to 5V. The synchronous boost converter can boost a 3V coin battery up to 15V output voltage. The 4 SPDT switches are supplied by the boost output voltage and control the eyeglass to act as a LCD shutter. The boost converter has the true shutdown function to achieve extremely low shutdown current. It is available in a QFN3x3-16 package.


3D Glass Driver
Small LCD Displays Bias Supply