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RT5721 - 2.4MHz 1A Step-Down Converter

Datasheet Summary

Description

The RT5721 is a step-down switching voltage regulator that delivers a digitally programmable output from an input voltage supply of 2.5V to 5.5V.

The output voltage is programmed through an I2C interface capable of operating up to 3.4MHz.

Features

  • Steady 2.4MHz Switching Frequency.
  • Fast Load Transient.
  • Continuous Output Current Capability: 1A.
  • 2.5V to 5.5V Input Voltage Range.
  • Digitally Programmable Output Voltage.
  • 0.3V to 1.3V Programmable Slew Rate for Voltage Transitions.
  • I2C-Compatible Interface Up to 3.4MHz.
  • PFM Mode for High Efficiency in Light Load.
  • Quiescent Current in PFM Mode: 45A (Typical).
  • Input Undervoltage Lockout (UVLO).
  • Thermal Shutdown and Overload Protection.

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Datasheet preview – RT5721

Datasheet Details

Part number RT5721
Manufacturer Richtek
File Size 1.36 MB
Description 2.4MHz 1A Step-Down Converter
Datasheet download datasheet RT5721 Datasheet
Additional preview pages of the RT5721 datasheet.

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Full PDF Text Transcription

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RT5721 2.4MHz 1A Step-Down Converter with I2C Interface General Description The RT5721 is a step-down switching voltage regulator that delivers a digitally programmable output from an input voltage supply of 2.5V to 5.5V. The output voltage is programmed through an I2C interface capable of operating up to 3.4MHz. Using a proprietary architecture with synchronous rectification, the RT5721 is capable of delivering 1A continuously at over 80% efficiency, maintaining that efficiency at load currents as low as 10mA. The regulator operates at a nominal fixed frequency of 2.4MHz, which reduces the value of the external components. Additional output capacitance can be added to improve regulation during load transients without affecting stability.
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