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Datasheet Microchip MIC2171WU-TR

Part NumberMIC2171WU-TR

The MIC2171 is a complete 100kHz SMPS current-mode controller with an internal 65V 2


  • Download » Datasheet PDF, 190 Kb, Revision: 11-05-2015
    MIC2171 - 100kHz 2.5A Switching Regulator
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    100kHz 2.5A Switching Regulator General Description Features The MIC2171 is a complete 100kHz SMPS current-mode
    controller with an internal 65V 2.5A power switch.
    Although primarily intended for voltage step-up applications, the floating switch architecture of the MIC2171
    makes it practical for step-down, inverting, and Cuk configurations as well as isolated topologies.
    Operating from 3V to 40V, the MIC2171 draws only 7mA
    of quiescent current, making it attractive for battery
    operated supplies.
    The MIC2171 is available in a 5-pin TO-220 or TO-263 for
    –40°C to +85°C operation.
    Data sheets and support documentation can be found on
    Micrel’s web site at: 2.5A, 65V internal switch rating
    3V to 40V input voltage range
    Current-mode operation, 2.5A peak
    Internal cycle-by-cycle current limit
    Thermal shutdown
    Twice the frequency of the LM2577
    Low external parts count
    Operates in most switching topologies
    7mA quiescent current (operating)
    Fits LT1171/LM2577 TO-220 and TO-263 sockets Applications Laptop/palmtop computers
    Battery operated equipment
    Hand-held instruments ...



Lifecycle StatusProduction (Appropriate for new designs but newer alternatives may exist)




Alternative TopologySEPIC, Flyback
Automotive QualNo
Duty Cycle Max95 %
Input Voltage Range Max40 V
Input Voltage Range Min(V)3
Light Load Efficiency ModeNo
Operating Temperature Range-40 to +85 °C
Output Voltage Range Max65 V
Output Voltage Range Min3.6 V
Quiescent Current7 mA) typ
Switch current4 A) typ
Switching Frequency100 kHz
Synchronous RectifierNo
Vfb1.24 V

Eco Plan


Moldel Line

Series: MIC2171 (3)

Manufacturer's Classification

  • Power Management > Switching Regulators > Step Up (Boost) - Non-Synchronous Products

Other Names:


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