Microchip Technology Inc

MIC2285A

In Production

The Micrel MIC2285A is a high efficiency 8MHz PWM synchronous buck (step-down) regulator that features a LowQ® LDO standby mode that draws only 18µA of quiescent current. The MIC2285A allows an ultra-low noise, small size, and high efficiency solution for portable power applications.

In PWM mode, the MIC2285A operates with a constant frequency 8MHz PWM control. Under light load conditions, such as in system sleep or standby modes, the PWM switching operation can be disabled to reduce switching losses. In this light load LowQ® mode, the LDO maintains the output voltage and draws only 18µA of quiescent current. The LDO mode of operation saves battery life while not introducing spurious noise and high ripple as experienced with pulse skipping or bursting mode regulators.

The MIC2285A operates from 2.7V to 5.5V input and features internal power MOSFETs that can supply up to 600mA output current in PWM mode. It can operate with a maximum duty cycle of 100% for use in low-dropout conditions.

The MIC2285A is available in the 10-pin 2mm x 2mm Thin MLF® package with a junction operating range from -40°C to +125°C.

 

    Features

        • Light load LowQ® LDO mode
          • 20 µA quiescent current
          • Low noise, 75 µVrms
        • 8MHz PWM mode
          • Output current to 600mA
          • >90% efficiency
          • 100% maximum duty cycle
        • Adjustable output voltage option down to 1V
          • Fixed output voltage options available
        • Ultra-fast transient response
        • Requires only a 0.47µH inductor
        • Enables sub 0.55mm profile solution
        • Fully integrated MOSFET switches
        • Micropower shutdown
        • Thermal shutdown and current limit protection
        • 10-pin 2mm x 2mm x 0.55mm MLF® package
        • -40°C to +125°C junction temperature range
    Parameter Name
    Value
    Regulator Type
    Step Down (Buck)
    # of Outputs
    1
    Input Voltage Range Min (V)
    2.7
    Input Voltage Range Max (V)
    5.5
    Output Voltage Range Min (V)
    1
    Output Voltage Range Max (V)
    5.5
    Output Current (A) max
    600
    Quiescent Current (mA) typ
    0.79
    Switching Frequency (kHz)
    8000
    Synchronous Rectifier
    Yes
    Operating Temp Range
    -40 to 125
    Vfb (V)
    1
    Duty Cycle Max (%)
    1
    SHUTDOWN Current (µA) (Typ)
    0.01
    Documentation
    Data Sheets
    11/05/2015
    546KB
    Pricing & Samples
    All pricing shown in USD only.
    Part Number
    Leads
    Package Type
    Temp Range
    Packing
    1+
    26+
    100+
    1000+
    5000+
    Buy
    Sample
    MIC2285AYMT-TR
    10
    UDFN
    -40C to +125C
    T/R
    1.01
    0.84
    0.76
    0.74
    0.73
     

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    RoHS Information
    Part
    Number
    Device
    Weight
    Shipping
    Weight
    Lead
    Count
    Package
    Type
    Package
    Width
    Solder
    Composition
    JEDEC
    Indicator
    RoHS
     
    China
    EFUP
    MIC2285AYMT-TR
    0.006200
    0.073000
    10
    UDFN
    2x2x0.6mm
    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.