• Low RDS(ON) for Internal Switches (Top/Bottom): 110/70 mΩ

• 4.5-40V Input Voltage Range

• Internal Compensation

• Internal 1ms Soft-start Limits the Inrush Current

• Adjustable Switching Frequency Range: 500kHz to 2.5MHz

• 3A Output Current Capability

• 1.5% 0.6V Reference

• Low Quiescent Current

• Cycle-by-cycle Peak Current Limitation

• Short Circuit Protection

• Thermal Shutdown and Auto Recovery

• Compact Package: TSOT23-8

The SY8303A develops a high efficiency synchronous step-down DC/DC converter capable of delivering 3A load current. The SY8303A operates over a wide input voltage range from 4.5V to 40V and integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss. The SY8303A adopts peak current control scheme. The switching frequency is adjustable from 500 kHz to 2.5MHz using an external resistor.

The device also features ultra low quiescent operating to achieve high efficiency under light load. And the internal soft-start limits inrush current during power on. SY8303A is available in TSOT23-8 package.