General Description

The SY8089I is a high efficiency 1.5MHz synchronous

step down DC/DC regulator, which is capable of

delivering up to 2A output current. It can operate over

a wide input voltage range from 2.5V to 5.5V and

integrate main switch and synchronous switch with

very low RDS(ON) to minimize the conduction loss.

The SY8089I integrates reliable latch off function

when output over voltage, output short or thermal

shutdown happens.

The low output voltage ripple, the small external

inductor and the capacitor sizes are achieved with

1.5MHz switching frequency.

Features

 2.5V to 5.5V Input Voltage Range

 50μA Low Quiescent Current

 Low RDS(ON) for Internal Switches (Top/Bottom)

130mΩ /85mΩ

 High Switching Frequency 1.5MHz Minimizes

the External Components

 Internal Soft-start Limits the Inrush Current

 100% Dropout Operation

 Reliable Latch off Function When:

 Output Short

 Thermal Shutdown

 Output Voltage>120% of Regulated Voltage

 Output Auto Discharge Function

 RoHS Compliant and Halogen Free

 Compact Package: SOT23-5

Applications

 Set Top Box

 USB Dongle

 Media Player

 Smart phone