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UD06121 - SYNCHRONOUS STEP-DOWN CONVERTER

General Description

UTC UD06121 is a 1.4MHz constant frequency current mode PWM step-down converter.

It is ideal for portable equipment requiring very high current up to 1.2A from single-cell Lithium-ion batteries while still achieving over 90% efficiency during peak load conditions.

Key Features

  • S.
  • Input Voltage Range :2.5V~5.5V.
  • Output Voltage: from 0.6V to VIN.
  • High Efficiency: Up to 92%.
  • Constant Frequency Operation:1.4MHz.
  • Output Current:1.2A.
  • Quiescent Current: 200μA (input < 4.2V).
  • No Schottky Diode Required.
  • 100% Duty Cycle in Dropout.
  • 0.6V Reference Allows Low Output Voltages.
  • Current Mode Operation for Excellent Line and Load Transient Response.
  • Current limit, Enable function.
  • Short Circuit Protect (SCP).
  • ≤1µA Shu.

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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 UD06121 Preliminary 1.4MHz, 1.2A, VFB=0.6V SYNCHRONOUS STEP-DOWN CONVERTER  DESCRIPTION UTC UD06121 is a 1.4MHz constant frequency current mode PWM step-down converter. It is ideal for portable equipment requiring very high current up to 1.2A from single-cell Lithium-ion batteries while still achieving over 90% efficiency during peak load conditions. The 2.5V to 5.5V input voltage range makes UTC UD06121 ideally suited for single Li-Ion, two to four AA battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. Pulse skipping mode operation provides very low output ripple voltage for noise sensitive applications. Switching frequency is internally set at 1.