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Datasheet Microchip MIC4685WR

Part NumberMIC4685WR

The MIC4685 is a high-efficiency 200kHz stepdown (buck) switching regulator


  • Download » Datasheet PDF, 339 Kb, Revision: 11-05-2015
    MIC4685 Data Sheet
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    3A SPAK SuperSwitcherв„ў
    Buck Regulator General Description Features The MIC4685 is a high-efficiency 200kHz stepdown (buck)
    switching regulator. Power conversion efficiency of above
    85% is easily obtainable for a wide variety of applications.
    The MIC4685 achieves 3A of continuous current in the
    7-pin SPAK package.
    The thermal performance of the SPAK allows it to replace
    TO-220s and TO-263s (D2PAKs) in many applications.
    The SPAK saves board space with a 36% smaller footprint
    than TO-263.
    High-efficiency is maintained over a wide output current
    range by utilizing a boost capacitor to increase the voltage
    available to saturate the internal power switch. As a result
    of this high-efficiency, only the ground plane of the PCB is
    needed for a heat sink.
    The MIC4685 allows for a high degree of safety. It has a
    wide input voltage range of 4V to 30V (34V transient),
    allowing it to be used in applications where input voltage
    transients may be present. Built-in safety features include
    over-current protection, frequency-foldback short-circuit
    protection, and thermal shutdown.
    The MIC4685 is available in a 7-pin SPAK package with a ...



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




# of Outputs1
Automotive RatedNo
Duty Cycle Max0.94 %
Input Voltage Range4 - 30 V
Light Load Efficiency ModeNo
Operating Temperature Range-40 to +125 °C
Output Current3000 mA) Max
Output Voltage Range1.24 V
Quiescent Current6 mA) type
Regulator TypeStep Down (Buck)
SHUTDOWN Current5 µA
Switching Frequency200 kHz
Synchronous RectifierNo
Vfb1.24 V

Eco Plan


Moldel Line

Series: MIC4685 (2)

Manufacturer's Classification

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