SY21314DBC - High Efficiency 33V, 4A, 1MHz Step Up Regulator


  • Wide Input Range: 3-33V
  • Maximum Output Voltage: 33V
  • 1MHz Switching Frequency
  • Integrated 120 mΩ RDS(ON) Switch with 4A Peak Current Capability
  • Internal Soft-start
  • 0.6V ±2% Reference Voltage
  • Cycle-by-cycle Peak Current Limit
  • Over Temperature Protection
  • RoHS Compliant and Halogen Free
  • Compact Package: DFN3×3-10

Typical Application


The SY21314 is a high efficiency, current-mode control Boost regulator. The device integrates a 120mΩ low RDS(ON) N-channel MOSFET for high efficiency. The fixed 1MHz switching frequency and internal compensation reduce external components size and count. The build-in internal soft start circuitry minimizes the inrush current at start-up.

The SY21314 is available in compact DFN3×3-10 package.


  • Portable Device
  • Battery Powered System
  • Networking cards powered from PCI or PCI-express slots