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MP1529 2.7-5.5V, 1.2MHz Fixed Frequency Step-Up Converter LCD Backlight Plus Flash QFN16
MP1529 2.7-5.5V, 1.2MHz Fixed Frequency Step-Up Converter LCD Backlight Plus Flash QFN16

MP1529 2.7-5.5V, 1.2MHz Fixed Frequency Step-Up Converter LCD Backlight Plus Flash QFN16

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pMPS MP1529 — Fixed Frequency Step-Up Converter LCD Backlight Plus Flash, 2.7-5.5V input, QFN16./p
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    MP1529 2.7-5.5V, 1.2MHz Fixed Frequency Step-Up Converter LCD Backlight Plus Flash QFN16

    The MPS MP1529 is a Fixed Frequency Step-Up Converter LCD Backlight Plus Flash. It operates from a 2.7 V to 5.5 V input and switches at 1.2 MHz. It is supplied in a QFN16 package.

    The MP1529 is a step-up converter for driving two 6-LED backlight strings to 30mA and a 4-LED flash string to 150mA from a single Lithium-Ion battery.

    Key Specifications

    Part NumberMP1529
    FunctionFixed Frequency Step-Up Converter LCD Backlight Plus Flash
    Input Voltage2.7 V to 5.5 V
    Switching Frequency1.2 MHz
    InterfacePWM
    PackageQFN16
    LifecycleNRFND
    Ordering CodesMP1529

    Features

    • 2.7V to 5.5V Input Voltage Range
    • 25V Maximum Step-Up Voltage
    • <1µA Shutdown Mode
    • 1.2MHz Fixed Frequency Operation
    • LCD Backlight to 30mA, Flash to 150mA
    • Cycle-By-Cycle Current Limit
    • Independent Backlight, Preview and Flash Current Adjustment
    • Special PWM Dimming
    • Over Voltage Protection
    • Under Voltage Lockout

    Typical Application Circuit

    MP1529 typical application circuit
    MP1529 typical application circuit, as published in the MPS datasheet.

    Applications

    • Cellular Phones
    • Digital Still Cameras
    • Digital Video Cameras "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 MP1529 support?
    2.7 V to 5.5 V.
    Which package and ordering codes apply to the MP1529?
    QFN16; order codes include MP1529.
    What are the defining features of the MP1529?
    2.7V to 5.5V Input Voltage Range 25V Maximum Step-Up Voltage

    Shenzhen Gaorunxin Technology Co., Ltd

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    Shenzhen Gaorunxin Technology Co., Ltd

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