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RT5744 - 2.4MHz 4A/6A Step-Down Converter

Datasheet Summary

Description

The RT5744 and RT5746 are step-down switching voltage regulators that deliver a digitally programmable output from an input voltage supply of 2.5V to 5.5V.

The output voltage is programmed through an I2C interface that can operate up to 3.4MHz.

Features

  • Programmable Output Voltage Range.
  • 0.27V to 1.4V, 6.25mV/bit.
  • Programmable Slew Rate for Voltage Transitions.
  • Steady 2.4MHz Switching Frequency.
  • Fast Load Transient.
  • Continuous Output Current Capability: 4A/6A.
  • 2.5V to 5.5V Input Voltage Range.
  • Digitally Programmable Output Voltage.
  • I2C-Compatible Interface Up to 3.4Mbps.
  • PFM Mode for High Efficiency at Light Load.
  • Quiescent Current in PFM Mode: 45A (Typical).
  • Input Undervoltage Locko.

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Datasheet preview – RT5744

Datasheet Details

Part number RT5744
Manufacturer Richtek
File Size 1.34 MB
Description 2.4MHz 4A/6A Step-Down Converter
Datasheet download datasheet RT5744 Datasheet
Additional preview pages of the RT5744 datasheet.

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Full PDF Text Transcription

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RT5744/RT5746 2.4MHz 4A/6A Step-Down Converter with I2C Interface General Description The RT5744 and RT5746 are step-down switching voltage regulators that deliver a digitally programmable output from an input voltage supply of 2.5V to 5.5V. The output voltage is programmed through an I2C interface that can operate up to 3.4MHz. Using a proprietary architecture with synchronous rectification, the RT5744 and RT5746 are capable of delivering continuous 4A and 6A, maintaining that efficiency at load currents as low as 10mA. The regulator operates at a nominal fixed frequency of 2.4MHz, which reduces the external component counts. Additional output capacitance can be added to improve regulation during load transients without affecting stability.
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