SY20149BAAC - High Efficiency, 1.5MHz, 2A Buck


·       Low RDS(ON) for Internal Switches


·       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: TSOT23-5

Typical Application


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.

Low output voltage ripple and small external inductor and capacitor sizes are achieved with greater than 1.22MHz switching frequency.


·       LCD TV

·       Set Top Box

·       Net PC

·       Mini-Notebook PC

· Access Point Router