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Datasheet Microchip MIC4576-5.0WU-TR

Part NumberMIC4576-5.0WU-TR

The MIC4576 is a series of easy to use fixed and adjustable BiCMOS step-down (buck) switch-mode voltage regulators


  • Download » Datasheet PDF, 217 Kb, Revision: 11-05-2015
    MIC4576 Data Sheet
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    MIC4576 Micrel, Inc. MIC4576
    200kHz Simple 3A Buck Regulator General Description Features The MIC4576 is a series of easy to use п¬Ѓxed and adjustable
    BiCMOS step-down (buck) switch-mode voltage regulators.
    The 200kHz MIC4576 duplicates the pinout and function of
    the 52kHz LM2576. The higher switching frequency may
    allow up to a 2:1 reduction in output filter inductor size. Fixed 200kHz operation 3.3V, 5V, and adjustable output versions Voltage over specified line and load conditions:
    Fixed version: В±3% max. output voltage
    Adjustable version: ±2% max. feedback voltage Guaranteed 3A switch current Wide 4V to 36V input voltage range Wide 1.23V to 33V output voltage range Requires minimum external components < 200µA typical shutdown mode 75% efficiency (adjustable version > 75% typical) Standard inductors are 25% of typical LM2576 values Thermal shutdown Overcurrent protection 100% electrical thermal limit burn-in The MIC4576 is available in 3.3V, and 5V fixed output versions or a 1.23V to 33V adjustable output version. Both
    versions are capable of driving a 3A load with excellent line
    and load regulation.
    The feedback voltage is guaranteed to В±2% tolerance for
    adjustable versions, and the output voltage is guaranteed to
    ±3% for fixed versions, within specified voltages and load conditions. The oscillator frequency is guaranteed to ±10%.
    In shutdown mode, the regulator draws less than 200ВµA
    standby current. The regulator performs cycle-by-cycle
    current limiting and thermal shutdown for protection under
    fault conditions. Applications This series of simple switch-mode regulators requires a minimum number of external components and can operate using
    a standard series of inductors. Frequency compensation is
    provided internally.
    The MIC4576 is available in TO-220 (T) and TO-263 (U)
    packages for the industrial temperature range. Simple high-efficiency step-down (buck) regulator
    Efficient preregulator for linear regulators
    On-card switching regulators ...



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




# of Outputs1
Automotive RatedNo
Duty Cycle Max0.95 %
Input Voltage Range4 - 36 V
Light Load Efficiency ModeNo
Operating Temperature Range-40 to +85 °C
Output Current3000 mA) Max
Output Voltage Range1.23 V
Quiescent Current5 mA) type
Regulator TypeStep Down (Buck)
SHUTDOWN Current50 µA
Switching Frequency200 kHz
Synchronous RectifierNo
Vfb1.23 V

Eco Plan


Moldel Line

Series: MIC4576 (9)

Manufacturer's Classification

  • Power Management > Switching Regulators > Step Down up to 75V

Other Names:

MIC45765.0WUTR, MIC4576 5.0WU TR

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