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UD05123 - SYNCHRONOUS STEP-DOWN CONVERTER

Datasheet Summary

Description

UTC UD05123 is a 2.25MHz constant frequency current mode PWM step-down converter.

It is ideal for portable equipment requiring very high current up to 1.8A from single-cell Lithium-ion batteries while still achieving over 90% efficiency during peak load conditions.

Features

  • S.
  • Input Voltage Range :2.5V~5.5V.
  • Output Voltage: from 0.6V to VIN.
  • High Efficiency: Up to 92%.
  • Constant Frequency Operation: 2.25MHz.
  • Output Current:1.2A.
  • Quiescent Current: 50uA (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 S.

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Datasheet preview – UD05123

Datasheet Details

Part number UD05123
Manufacturer UTC
File Size 188.17 KB
Description SYNCHRONOUS STEP-DOWN CONVERTER
Datasheet download datasheet UD05123 Datasheet
Additional preview pages of the UD05123 datasheet.

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Full PDF Text Transcription

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UNISONIC TECHNOLOGIES CO., LTD UD05123 2.25MHz, 1.2A, VFB=0.6V SYNCHRONOUS STEP-DOWN CONVERTER CMOS IC  DESCRIPTION UTC UD05123 is a 2.25MHz constant frequency current mode PWM step-down converter. It is ideal for portable equipment requiring very high current up to 1.8A 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 UD05123 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 2.
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