SY21113GADC -


·         Low RDS(ON) for Internal Switches (Top/Bottom): 80mΩ/40mΩ

·         4.5-18V Input Voltage Range

·         3A Output Current Capability

·         500 kHz Switching Frequency

·         Instant PWM Architecture to Achieve Fast Transient Responses.

·         Cycle-by-cycle Peak Current Limitation

·         Internal Softstart Limits The Inrush Current

·         ±1.5% 0.6V Reference

·         TSOT23-6 Package

Typical Application


The SY21113G is a high efficiency 500 kHz synchronous step down DC/DC converter capable of delivering 3A current. The SY21113G operates over a wide input voltage range from 4.5V to 18V and integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss.

SY21113G always operates under continuous condition mode; low output ripple and small inductor and capacitor size are achieved with 500kHz switching frequency.


·       Set Top Box

·       Portable TV

·       Access Point Router

·       DSL Modem

·       LCD TV