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UM3500 - Synchronous Step-Down DC-DC Converter

General Description

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.

Key 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 Short Circuit Protection z Thermal Fault Protection z.

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Datasheet Details

Part number UM3500
Manufacturer Union Semiconductor
File Size 323.52 KB
Description Synchronous Step-Down DC-DC Converter
Datasheet download datasheet UM3500 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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UM3500 600mA, 1.5MHz, Synchronous Step-Down DC-DC Converter UM3500 SOT23-5 General Description 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-Ion (Li+) battery. The UM3500 can supply 600mA of load current from a 2.5V to 5.5V input voltage. The output voltage can be regulated as low as 0.6V. The UM3500 can also run at 100% duty cycle for low dropout operation, extending battery life in portable system. Pulse Skipping Mode operation at light loads provides very low output ripple voltage for noise sensitive applications.