UM3500 Datasheet - Union Semiconductor

UM3500 Synchronous Step-Down DC-DC Converter

The UM3500 is a 1.5MHz constant frequency, slope compensated current mode PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency without an external Schottky diode. It is ideal for powering portable equipment that runs from a single cell lithium.

UM3500 Features

* z High Efficiency: Up to 96% z 1.5MHz Constant Switching Frequency z 600mA Output Current z Integrated Main Switch and Synchronous Rectifier. No External Schottky Diode. z 2.5V to 5.5V Input Voltage Range z Output Voltage as Low as 0.6V z 100% Duty Cycle in Dropout z Low Quiescent Current: 50µA z Sh

UM3500-UnionSemiconductor.pdf