SY21612CQFC - High Efficiency, 38V Maximum Input Single Inductor Synchronous Step Up/Down Regulator


  • 4V to 28V Operating Input Voltage Range
  • 38V Absolute Maximum Input Voltage
  • Low RDS(ON) for Internal Switches: 25mΩ
  • Internal Soft-start Limits the Inrush Current
  • Hiccup Mode for Output Over Current,Short-Circuit and Over Voltage Protection
  • Thermal Shutdown with Auto Recovery
  • 250kHz/500kHz Selectable Switching Frequency 
  • 6A/10A Selectable Average Inductor Current Limitation
  • 1.0V±1.5% Reference Voltage Accuracy
  • Programmable Output Current Limitation with External Sensing Resistor
  • Compact package: QFN4×4-32


The SY21612C is a high voltage synchronous Buck-Boost converter. The device operates over a wide input voltage range from 4V to 28V with 10A maximum average inductor current capability. The four-integrated low RDS(ON) switches minimize the conduction loss. 
The SY21612C includes full protection features, such as output over current/short circuit protection, over voltage protection and thermal shutdown for reliable operating. 
The device is available in compact QFN4×4-32 package.


  • Docking Station
  • Laptop
  • High-end Power Bank
  • Monitor
  • Car Charger
  • USB PD