SY20493SUC - 0.85V Minimum Input and 5. 5V Maximum Output High Efficiency 2A Valley Current Synchronous Boost


  • 0.85V Minimum Input Voltage
  • Adjustable Output Voltage From 1.8V to 5.5V
  • Min 2A Valley Current Limit
  • 5µA Typical Quiescent Current
  • Load Disconnect During Shutdown
  • Low RDS(ON) (Main Switch/Synchronous Switch) at 3.3V Output: 70/125mΩ
  • Output OVP
  • RoHS Compliant and Halogen Free
  • Auto Bypass Mode When VIN ≥VOUT
  • Compact Package DFN2x1.5-6

Typical Application


SY20493 is a high efficient, synchronous, step-up Boost converter designed for one-cell Li-Ion or Li-polymer, or a two to three-cell alkaline Ni-Cd or Ni-MH battery powered applications. It can convert down to 0.85V input voltage. It adopts NMOS for the main switch and PMOS for the synchronous switch.

SY20493 can disconnect the output from input during the shutdown mode. When input voltage exceeds the regulated output voltage, SY20493 enters bypass mode automatically.


  • All Single Cell Li or Dual Cell Battery Operated Products as MP-3 Player, PDAs, and Other Portable Equipment