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Datasheet Microchip MIC24055


The MIC24055 is a constant-frequency, synchronous buck regulator featuring a unique adaptive on-time control architecture


  • Download » Datasheet, PDF, 1.8 Mb, Revision: 11-09-2015
    MIC24055 - 12V, 12A High-Efficiency Buck Regulator
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    12V, 12A High-Efficiency Buck Regulator
    SuperSwitcher II General Description Features The Micrel MIC24055 is a constant-frequency,
    synchronous buck regulator featuring a unique adaptive
    on-time control architecture. The MIC24055 operates over
    an input supply range of 4.5V to 19V and provides a
    regulated output of up to 12A of output current. The output
    voltage is adjustable down to 0.8V with a guaranteed
    accuracy of ±1%, and the device operates at a switching
    frequency of 600kHz. Micrel’s Hyper Speed Control architecture allows for
    ultra-fast transient response while reducing the output
    capacitance and also makes (High VIN)/(Low VOUT)
    operation possible. This adaptive tON ripple control
    architecture combines the advantages of fixed-frequency
    operation and fast transient response in a single device.
    The MIC24055 offers a full suite of protection features to
    ensure protection of the IC during fault conditions. These
    include undervoltage lockout to ensure proper operation
    under power-sag conditions, internal soft-start to reduce
    inrush current, foldback current limit, “hiccup mode” shortcircuit protection and thermal shutdown. An open-drain
    power good (PG) pin is provided.
    The 12A HyperLight Load part, MIC24056, is also ...



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




# of Outputs1
Automotive RatedNo
Duty Cycle Max, %0.82
Input Voltage Range, V4.5 - 19
Light Load Efficiency ModeNo
Operating Temperature Range, °C-40 to +125
Output Current, mA) Max12000
Output Voltage Range, V0.8 - 5.5
Quiescent Current, mA) type0.73
Regulator TypeStep Down (Buck)
SHUTDOWN Current, µA5
Switching Frequency, kHz600
Synchronous RectifierYes
Vfb, V0.8

Eco Plan


Moldel Line

Series: MIC24055 (1)

Manufacturer's Classification

  • Power Management > Switching Regulators > Step Down up to 36V

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