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UD05104 - 5V 1A 2.25MHz SYNCHRONOUS STEP-DOWN DC/DC CONVERTER

General Description

The UTC UD05104 is a 1A high frequency synchronous Step Down DC/DC converter using constant frequency, current mode architecture.

The device integrates main switch and synchronous rectifier switch for high efficiency without an external schottky diode.

Key Features

  • Input Voltage Range from 2.5V to 6.0V.
  • +/-2% 0.6V Feedback Voltage Accuracy.
  • 2.25MHz Switching Frequency.
  • Continuous Output Current up to 1A.
  • Low Quiescent Current of 30µA.
  • 0.1μA Shutdown Current.
  • 100% Duty Cycle Operation.
  • Built-in 170mΩ/150mΩ Power Switch.
  • Internal Soft-Start.
  • Cycle-by-Cycle Current Limit Protection.
  • Over-Load and Hiccup Mode Short Circuit.
  • Thermal Shutdown Protection.

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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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UNISONIC TECHNOLOGIES CO., LTD UD05104 Preliminary LINEAR INTEGRATED CIRCUIT 5V 1A 2.25MHz SYNCHRONOUS STEP-DOWN DC/DC CONVERTER  DESCRIPTION The UTC UD05104 is a 1A high frequency synchronous Step Down DC/DC converter using constant frequency, current mode architecture. The device integrates main switch and synchronous rectifier switch for high efficiency without an external schottky diode. To maximize light load efficiency, The UTC UD05104 draws only 30μA quiescent current to improve light load efficiency. In shutdown, The UTC UD05104 reduces supply current less than 1μA. The UTC UD05104 can supply 1A of load current from 2.5V to 6.0V input voltage. The output voltage can be regulated as low as 0.6V. The switching frequency is internally set at 2.