SY21113DAIC -


·         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 Current Limitation

·         Hiccup Mode Short Circuit Protection

·         Power Good Indicator

·         Programmable Soft-Start Time to Limit the Inrush Current.

·         ±1.5% 0.6V Reference

·         Thermal Shut Down with Auto-recovery

·         Rohs Compliant and Halogen Free

·         TSOT23-8 Package

Typical Application


The SY21113D is a high efficiency 500 kHz synchronous step down DC/DC converter capable of delivering 3A current. The SY21113D 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.

Low output voltage ripple and small external inductor and capacitor sizes are achieved with 500 kHz switching frequency. It adopts the instant PWM architecture to achieve fast transient responses for high step down applications


·       Set Top Box

·       Portable TV

·       Access Point Router

·       DSL Modem

·       LCD TV