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MIC2238

Dual 800/800mA Synchronous Buck Regulator

Status: In Production

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
  • /FPWM pin allows low noise all-PWM mode operation
  • Power good output with internal 5µA current source allows sequencing with programmable delay time
  • Internal soft-start
  • 1µA shutdown current
  • Built-in soft-start circuitry
  • Current limit protection
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The 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 0.8V

For applications that require the lowest noise performance, the /FPWM pin allows the automatic Trickle mode to be disabled, remaining in full PWM mode. To maximize battery life in low-dropout conditions, MIC2238 can operate with a maximum duty cycle of 100%.

Additional 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
    • /FPWM pin allows low noise all-PWM mode operation
    • Power good output with internal 5µA current source allows sequencing with programmable delay time
    • Internal soft-start
    • 1µA shutdown current
    • Built-in soft-start circuitry
    • Current limit protection

     

    Parametrics
    Name
    Value
    Regulator Type
    Multi-Output
    # of Outputs
    2
    Input Voltage Range Min (V)
    2.5
    Input Voltage Range Max (V)
    5.5
    Output Voltage Range Min (V)
    0.8
    Output Voltage Range Max (V)
    5.5
    Output Current (mA) max
    800
    Switching Frequency (kHz)
    2500
    Synchronous Rectifier
    Yes
    Operating Temp Range
    -40 to 125
    Vfb (V)
    0.8
    Duty Cycle Max (%)
    1
    SHUTDOWN Current (µA) (Typ)
    1

    Documents

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    Data Sheets

    09/11/2017
    1093KB

    Development tools data is currently unavailable.

    RoHS Information

    Part Number
    Device Weight (g)
    Shipping Weight (grams)
    Lead Count
    Package Type
    Package Width
    Solder Composition
    JEDEC Indicator
    RoHS
    China EFUP
    MIC2238-G4YML-TR
    0.023840
    0.644302
    12
    VDFN
    3x3x0.9mm
    NiPdAu
    e4
    MIC2238-GFHYML-TR
    0.023840
    0.644302
    12
    VDFN
    3x3x0.9mm
    NiPdAu
    e4
    MIC2238-J4YML-TR
    0.023840
    0.644302
    12
    VDFN
    3x3x0.9mm
    NiPdAu
    e4
    MIC2238-SSYML-TR
    0.023840
    0.644302
    12
    VDFN
    3x3x0.9mm
    NiPdAu
    e4
    MIC2238-AAYML-TR
    0.023840
    0.644302
    12
    VDFN
    3x3x0.9mm
    NiPdAu
    e4
    MIC2238-GSYML-TR
    0.023840
    0.644302
    12
    VDFN
    3x3x0.9mm
    NiPdAu
    e4
    MIC2238-S4YML-TR
    0.023840
    0.644302
    12
    VDFN
    3x3x0.9mm
    NiPdAu
    e4
    To see a complete listing of RoHS data for this device, please Click here
    Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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