• 2.2~5.5V Input Voltage Range
• Ultra Low Quiescent Current Down to 400nA
• Low RDS(ON) for Internal Switches (Top/Bottom) 280mΩ /120mΩ
• Instant PWM Control to Achieve Ultra Fast Load Transient Speed.
• High Switching Frequency 1.0MHz Minimizes the External Components
• Internal Soft-start Limits the Inrush Current
• Power Good Indicator
• Hiccup Mode for Output Short Circuit Protection
• 100% Drop Out Operation
• Output Auto Discharge Function
• RoHS Compliant and Halogen Free
• Compact Package: DFN2x2-8

 The SY20011 high-efficiency 1MHz synchronous step-down DC/DC regulator operates over a wide input voltage range of 2.5V to 5.5V and is capable of delivering up to 500mA output current. It integrates a main switch and a synchronous switch with very low R_DS(ON) to minimize conduction loss.

The SY20011 uses a constant on-time and ripple-based control strategy to achieve fast transient responses. The input and output capacitors, the inductor, and the resistor-divider components must be selected for the targeted application specifications.

The device uses only 400nA quiescent current during normal operation (typ, STB=0) and only 10 nA (typ.) in shutdown mode.

This makes it ideal in the design of products that use very small batteries, and where battery life is critical.

The SY20011 is available in a space-saving, low-profile DFN2mmx2mm-8 package.