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                                      SY20428 -

                                      Features

                                      • 0.9V To 4V Wide Input Range
                                      • 4V Max Output Voltage
                                      • 1.8A Internal Switch
                                      • Up To 95% Efficiency
                                      • < 1ua Shut Down Current
                                      • 1.2mhz Switching Frequency
                                      • Minimum On Time: 80ns Typical
                                      • Minimum Off Time: 60ns Typical
                                      • Output Disconnect At Shutdown
                                      • Low RDS(ON) (Main Switch/Synchronous Switch) At 3.3V Output: 90/200m?
                                      • Compact SOT23-6

                                      Typical Application

                                      Description

                                      SY20428 is a 1.2MHz fixed frequency, Current mode, high efficiency synchronous boost regulator that converts down to 0.9V input into up to 4V output voltage. It adopts very low Rdson N-MOS for the main switch and P-MOS for the synchronous switch, so no external Schottky didode is required, and the system efficiency is improved. It can disconnect the output during the shutdown operation. The SY20428 intended for systems that are typically operated from a single or dual-cell nickel-cadmium(NICd), mickel-metal hydride (NiMH), or alkaline battery.

                                      Applications

                                      • LiIon or LiPolymer Powered Cell Phones, DSCs, PMP, GPS.
                                      • Alkaline Battery Powered Electronic Equipment.
                                      • Wireless Mouse.

                                      湖北十一选五遗漏走势图

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