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UD05251 - 2.5A SYNCHRONOUS STEP-DOWN CONVERTER

General Description

The UTC UD05251 is a 1.2MHz constant frequency current mode PWM step-down converter.

It is ideal for portable equipment requiring very high current up to 2.5A from single-cell Lithium-ion batteries while still achieving over 90% efficiency during peak load conditions.

Key Features

  • S.
  • 2.6V to 5.5V Input Voltage Range.
  • Adjustable Output Voltages from 0.6V to VIN Fixed output voltage from 0.6V to VIN in increments of 0.05V.
  • High Efficiency: Up to 94%.
  • 1.2MHz Constant Frequency Operation.
  • Output Current: Up to 2.5A Output Current.
  • No Schottky Diode Required.
  • Current Mode Operation for Excellent Line and Load Transient Response.
  • Current limit, Enable function.
  • Short Circuit Protect (SCP).
  • Build-in Soft Start function.
  • ≤1µA.

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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 UD05251 Preliminary LINEAR INTEGRATED CIRCUIT 1.2MHZ, 2.5A SYNCHRONOUS STEP-DOWN CONVERTER  DESCRIPTION The UTC UD05251 is a 1.2MHz constant frequency current mode PWM step-down converter. It is ideal for portable equipment requiring very high current up to 2.5A from single-cell Lithium-ion batteries while still achieving over 90% efficiency during peak load conditions. The UTC UD05251 also can run at 100% duty cycle for low dropout operation, extending battery life in portable systems while light load operation provides very low output ripple for noise sensitive applications. The UTC UD05251 can supply up to 2.5A output current from a 2.6V to 4V input voltage and up to 3A output current from a 4V to 5.5V input voltage.