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MIC4744 - 4 MHz Dual 2A Integrated Switch Buck Regulator

Description

The Micrel MIC4744 is a high efficiency dual PWM buck (step-down) regulator that provides dual 2A current output.

The MIC4744 operates at 4MHz.

A proprietary internal compensation technique allows a closed loop bandwidth of over 200kHz.

Features

  • 2.9 to 5.5V supply voltage.
  • 4MHz PWM mode.
  • 2A Dual output.
  • Greater than 90% efficiency.
  • 100% maximum duty cycle.
  • Output voltage adjustable down to 0.6V.
  • Ultra-fast transient response.
  • Ultra-small external components Stable with a 0.47µH inductor and a 10µF output capacitor.
  • Fully integrated 2A MOSFET switches.
  • Micro-power shutdown.
  • Thermal shutdown and current limit protection.
  • Available.

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Datasheet preview – MIC4744

Datasheet Details

Part number MIC4744
Manufacturer Micrel Semiconductor
File Size 708.06 KB
Description 4 MHz Dual 2A Integrated Switch Buck Regulator
Datasheet download datasheet MIC4744 Datasheet
Additional preview pages of the MIC4744 datasheet.

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Full PDF Text Transcription

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MIC4744 4 MHz Dual 2A Integrated Switch Buck Regulator General Description The Micrel MIC4744 is a high efficiency dual PWM buck (step-down) regulator that provides dual 2A current output. The MIC4744 operates at 4MHz. A proprietary internal compensation technique allows a closed loop bandwidth of over 200kHz. The low on-resistance internal P-Channel MOSFET of the MIC4744 allows efficiencies over 90%, reduces external components count and eliminates the need for an expensive current sense resistor. The MIC4744 operates from 2.9V to 5.5V input and the output can be adjusted down to 0.6V. The device can operate with a maximum duty cycle of 100% for use in lowdropout conditions.
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