SY20321AIC - High Efficiency 2MHz, Dual 2A Synchronous Step Down Regulator


· 2.5V to 5.5V Input Voltage

·       2MHz Switching Frequency

·       180° Out of Phase Operation

·       Output Current: 2A per Channel

·       Low Quiescent Current: <45µA for Both Channels

·       Low RDS(ON) for Internal Switches (PFET/NFET):  125mΩ/100mΩ

·       Internal Soft-start

·       100% Dropout Operation

·       RoHS Compliant and Halogen Free

·       Compact Package: TSOT23-8

Typical Application


The SY20321 is a dual output, high efficiency 2MHz synchronous step down DC/DC regulator capable of delivering up to 2A output current for each output channel. The SY20321 operates over a wide input voltage range from 2.5V to 5.5V and integrates a main switch and a synchronous switch with very low RDS(ON) to minimize the conduction loss.


·       SSD

·       Cell Phones

·       Digital Cameras

·       PDAs

·       Portable Media Players