• ·       Low R_DS(ON) for Internal N-channel Power FET: 180mΩ
• ·       5V to 40V Input Voltage Range
• ·       Up to 1.2A Output Current
• ·       800kHz Switching Frequency
• ·       Constant Off-Time and Peak Current Mode Control
• ·       Internal Soft-Start Limits Inrush Current
• ·       ±2% 0.6V Reference
• ·       Output Short Circuit Protection
• ·       Cycle-by-Cycle Peak Current Limit
• ·       Over Temperature Protection
• ·       RoHS-Compliant and Halogen-Free
• ·       Compact SOT23-6 Package
  

The SY21061 high-efficiency asynchronous Buck converter can deliver 1.2A output current over a wide input voltage range from 5V to 40V. The SY21061 employs a constant off-time and peak current mode control strategy to achieve fast transient responses. It integrates a main switch with low R_DS(ON) to minimize conduction loss.

The 800kHz switching frequency permits low output voltage ripple and reduces external inductor and capacitor sizes. The SY21061 also provides cycle-by-cycle current limiting, over temperature protection, and output short circuit protection.

The SY21061 is available in a compact SOT23-6 package.