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Datasheet Microchip MIC4721


The MIC4721 is a high efficiency PWM buck (step-down) regulators that provides up to 1


  • Download » Datasheet, PDF, 834 Kb, Revision: 11-05-2015
    MIC4721 Data Sheet
    Docket ↓
    1.5A 2MHz Integrated Switch
    Buck Regulator General Description Features The Micrel MIC4721 is a high efficiency PWM buck (stepdown) regulators that provides up to 1.5A of output
    current. The MIC4721 operates at 2MHz and has
    proprietary internal compensation that allows a closed loop
    bandwidth of over 200KHz.
    The low on-resistance internal p-channel MOSFET of the
    MIC4721 allows efficiencies up to 94%, reduces external
    components count and eliminates the need for an
    expensive current sense resistor.
    The MIC4721 operates from 2.7V to 5.5V input and the
    output can be adjusted down to 1V. The devices can
    operate with a maximum duty cycle of 100% for use in lowdropout conditions.
    The MIC4721 is available in the 10-pin MSOP package
    with a junction operating range from –40°C to +125°C.
    Data sheets and support documentation can be found on
    Micrel’s web site at: 2.7 to 5.5V supply voltage
    2MHz PWM mode
    Output current to 1.5A
    Up to 94% efficiency
    100% maximum duty cycle
    Adjustable output voltage option down to 1V
    Ultra-fast transient response ...



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




# of Outputs11
Automotive RatedNoNo
Duty Cycle Max, %11
Input Voltage Range, V2.7 - 5.52.7 - 5.5
Light Load Efficiency ModeNoNo
Operating Temperature Range, °C-40 to +125-40 to +125
Output Current, mA) Max15001500
Output Voltage Range, V1 - 5.51 - 5.5
Quiescent Current, mA) type0.570.57
Regulator TypeStep Down (Buck)Step Down (Buck)
SHUTDOWN Current, µA22
Switching Frequency, kHz20002000
Synchronous RectifierNoNo
Vfb, V11

Eco Plan


Moldel Line

Series: MIC4721 (2)

Manufacturer's Classification

  • Power Management > Switching Regulators > Step Down up to 6V

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