SY21102ABC -


·       5-40V Input Voltage Range

·       Low RDS(ON) for Internal N-Channel Power FET:180 mΩ

·       800kHz Switching Frequency

·       Adaptive Constant Off Time Control

·       Internal Softstart Limits the Inrush Current

·       2% 0.6v Reference

·       Hic-cup Mode Short Circuit Protection

·       Cycle by Cycle Peak Current Limit

·       Thermal Shutdown Protection

·       Rohs Compliant and Halogen Free

·       Compact Package: SOT23-6

Typical Application


The SY21102 is a high efficiency 800 kHz, adaptive constant OFF time controlled asynchronous step down DC/DC regulator capable of delivering 2A output current. The SY21102 can operate over a wide input voltage range from 5V to 40V and integrate main 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 800 kHz switching frequency.


·       Set Top Box

·       Portable TV

·       Access Point Router

·       DSL Modem

·       LCD TV