SY20149B -
Features
· Low RDS(ON) for Internal Switches
(top/bottom):110mΩ/80mΩ
· 2.7-5.5V Input Voltage Range
· 2AContinuous Load Current Capability
· 1.22MHz Switching Frequency Minimizes the External Components
· Internal Softstart Limits the Inrush Current
· Reliable Hic-cup Mode Short Circuit Protection
· 100% Dropout Operation
· RoHS Compliant and Halogen Free
· Compact Package: TSOT23-5Typical Application

Description
The SY20149B is a high-efficiency, high frequency synchronous step down DC/DC regulator IC capable of delivering up to2Aoutput current. The SY20149B operates over a wide input voltage range from 2.7V to 5.5V and integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss.
Applications
· LCD TV
· Set Top Box
· Net PC
· Mini-Notebook PC
· Access Point Router