High Efficiency 5.5V, 2A continuous, 3A peak, 1MHz  Synchronous Step Down Regulator

General Description  The SY8113B is a high efficiency 500 kHz  synchronous step-down DC-DC converter capable of  delivering 3A current. The SY8113B 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.Features  • 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

High Efficiency Fast Response, 1A, 27V Input  Synchronous Step Down Regulator  Preliminary Specification