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Datasheet Microchip LM2576-12WU-TR

Part NumberLM2576-12WU-TR

The LM2576 series of monolithic integrated circuits provide all the active functions for a step-down (buck) switching regulator


  • Download » Datasheet PDF, 59 Kb, Revision: 11-05-2015
    LM2576 - 52 kHz Simple 3A Buck Regulator
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    LM2576 Micrel, Inc. LM2576
    52kHz Simple 3A Buck Regulator General Description Features The LM2576 series of monolithic integrated circuits provide
    all the active functions for a step-down (buck) switching
    regulator. Fixed versions are available with a 3.3V, 5V, or 12V
    fixed output. Adjustable versions have an output voltage
    range from 1.23V to 37V. Both versions are capable of driving
    a 3A load with excellent line and load regulation.
    These regulators are simple to use because they require a
    minimum number of external components and include internal
    frequency compensation and a fixed-frequency oscillator.
    The LM2576 series offers a high efficiency replacement for
    popular three-terminal adjustable linear regulators. It
    substantially reduces the size of the heat sink, and in many
    cases no heat sink is required.
    A standard series of inductors available from several different
    manufacturers are ideal for use with the LM2576 series. This
    feature greatly simplifies the design of switch-mode power
    The feedback voltage is guaranteed to В±2% tolerance for
    adjustable versions, and the output voltage is guaranteed to
    В±3% for fixed versions, within specified input voltages and
    output load conditions. The oscillator frequency is guaranteed
    to В±10%. External shutdown is included, featuring less than ...



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




# of Outputs1
Automotive RatedNo
Duty Cycle Max0.98 %
Input Voltage Range4 - 40 V
Light Load Efficiency ModeNo
Operating Temperature Range-40 to +85 °C
Output Current3000 mA) Max
Output Voltage Range1.23 V
Quiescent Current30 mA) type
Regulator TypeStep Down (Buck)
SHUTDOWN Current50 µA
Switching Frequency52 kHz
Synchronous RectifierNo
Vfb1.23 V

Eco Plan


Moldel Line

Series: LM2576 (12)

Manufacturer's Classification

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

Other Names:

LM257612WUTR, LM2576 12WU TR

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