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MIC2238 - 2.5MHz Dual Phase PWM Buck Regulator

Description

The Micrel MIC2238 is dual output 2-phase synchronous buck (step down) PWM DC/DC switching regulator.

Power conversion efficiencies of above 95% are easily obtainable for a wide range of applications and loads.

Features

  • Input voltage range: 2.5V to 5.5V Dual output voltages running out of phase 28µA quiescent current Fixed output voltage versions Adjustable version down to 0.8V Low noise 2.5MHz PWM operation 800mA output current capability for each channel Stable with 2.2µH inductor, 2.2µF ceramic cap Automatic switching into light load mode of operation.

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Datasheet Details

Part number MIC2238
Manufacturer Micrel Semiconductor
File Size 1.10 MB
Description 2.5MHz Dual Phase PWM Buck Regulator
Datasheet download datasheet MIC2238 Datasheet

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Full PDF Text Transcription

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MIC2238 2.5MHz Dual Phase PWM Buck Regulator General Description The Micrel MIC2238 is dual output 2-phase synchronous buck (step down) PWM DC/DC switching regulator. Power conversion efficiencies of above 95% are easily obtainable for a wide range of applications and loads. An ultra-low quiescent current of 28µA at light loads assures minimum current draw in battery powered applications that require standby modes. The 2.5MHz PWM operation of MIC2238 allows the use of miniature 1µH, 2.2µH or 4.7µH inductor with the use of 2.2µF ceramic output capacitor. The MIC2238 operates from 2.5V to 5.5V input and is available in fixed output voltage versions to save space and reduce external component count. The MIC2238-AA’s (adjustable version) output voltage versions can be programmed as low as 0.
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