• 2.5V to 5.5V Input Voltage Range
• 50μA Low Quiescent Current
• Low RDS(ON) for Internal Switches (Top/Bottom) 260mΩ /160mΩ
• High Switching Frequency 1.5MHz Minimizes the External Components
• Internal Soft-start Limits the Inrush Current
• 100% Dropout Operation
• Reliable Short Circuit Protection
• Output Auto Discharge Function
• RoHS Compliant and Halogen Free
• Compact Package: SOT23-5

 The SY20018I high-efficiency 1.5MHz synchronous step-down DC/DC regulator operates over a wide input voltage range of 2.5V to 5.5V, and can deliver an output current up to 1A with a low quiescent current of 50µA. It integrates a main switch and a synchronous switch with very low R_DS(ON) to minimize conduction loss. The 1.5MHz switching frequency allows for low output-voltage ripple, as well as small external inductor and capacitor values.

The SY20018I is highly integrated, so only the input and output capacitors, inductor, and feedback resistors need to be selected for the targeted application specifications.

The SY20018I is available in a compact SOT23-5 package.