GRX Technology Co, Ltd
MP38874 4.5-21V, 8A, 600KHz Step-Down Converter QFN14
MP38874 4.5-21V, 8A, 600KHz Step-Down Converter QFN14

MP38874 4.5-21V, 8A, 600KHz Step-Down Converter QFN14

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pMPS MP38874 — Step-Down Converter, 4.5-21V input, 8 A output, QFN14./p
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    MP38874 4.5-21V, 8A, 600KHz Step-Down Converter QFN14

    The MPS MP38874 is a Step-Down Converter. It operates from a 4.5 V to 21 V input, is rated for 8 A and switches at 600 KHz. It is supplied in a QFN14 package.

    The MP38874 is a monolithic step-down switch mode converter with a built in internal power MOSFET.

    Key Specifications

    Part NumberMP38874
    FunctionStep-Down Converter
    Input Voltage4.5 V to 21 V
    Current Rating8 A
    Switching Frequency600 KHz
    Peak Efficiency95%
    PackageQFN14
    Ordering CodesMP38874

    Features

    • Wide 4.5V to 21V Operating Input Range
    • 8A Continuous Output Current
    • 42mΩ Internal Power MOSFET Switch
    • Power Good Indicator
    • Synchronous Gate Driver Delivers up to 95% Efficiency
    • Fixed 600KHz Frequency
    • Synchronizable to >1MHz External Clock
    • Cycle-by-Cycle Over Current Protection
    • Thermal Shutdown
    • Output Adjustable from 0.8V to 15V

    Typical Application Circuit

    MP38874 typical application circuit
    MP38874 typical application circuit, as published in the MPS datasheet.

    Applications

    • Point of Load Regulator in Distributed Power System
    • Digital Set Top Boxes
    • Personal Video Recorders
    • Broadband Communications
    • Flat Panel Television and Monitors "MPS" and "The Future of Analog IC Technology" are Registered Trademarks of Monolithic Power Systems, Inc.

    Design Notes

    • Size the inductor for the ripple current at the actual switching frequency, typically 30% of the DC load — not for the DC rating alone.
    • The hot loop from input capacitor through the switch to ground sets conducted EMI. Keep that copper area as small as the layout allows.
    • Output ripple is set by the capacitor ESR and its DC-bias derating; a 10 µF ceramic often behaves like 4 µF at the rated output voltage.
    • Route the feedback divider from the output capacitor terminals, away from the switch node.

    Common Questions

    What input voltage does the MP38874 support?
    4.5 V to 21 V. The rated output is 8 A.
    Which package and ordering codes apply to the MP38874?
    QFN14; order codes include MP38874.
    What are the defining features of the MP38874?
    Wide 4.5V to 21V Operating Input Range 8A Continuous Output Current

    Shenzhen Gaorunxin Technology Co., Ltd

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    Shenzhen Gaorunxin Technology Co., Ltd

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