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    2.2MHz, Fixed Output Synchronous Tiny Step-Up Converter with a 3A Switch
    2.2MHz, Fixed Output Synchronous Tiny Step-Up Converter with a 3A Switch

    The SGM66055A is an internally compensated, 2.2MHz switching frequency, current mode, synchronous step-up switching regulator. Even below the minimum system battery voltage, the device maintains the output voltage regulation for a minimum output load current of 0.7A. This device turns into power-save mode to maintain high efficiency by lowering switching frequency. With its anti-ringing circuitry damping the charge in parasitic capacitor, it reduces EMI interference significantly.

    In addition, the SGM66055A device can also support the pass-through mode by pulling EN to low. In this mode, the output voltage follows the input voltage with a voltage drop by the resistance of the inductor and high-side FET.

    The SGM66055A-5.0 and SGM66055A-5.4 are preset for outputting 5.0V and 5.4V.

    The device is available in a Green WLCSP-1.21×1.21-9B package and operates over an ambient temperature range of -40 to +85℃.



    • 93% Efficient Synchronous Boost Converter

    • Device Quiescent Current: 23μA (TYP)

    • Operating Input Voltage Range: 2.5V to 4.5V

    • Fixed Output Voltages: 5.0V and 5.4V

    • Output Voltage Clamping: 5.7V

    • Power-Save Mode for Improved Efficiency at Low Output Power

    • Pass-through Mode by Pulling EN Low

    • Low Reverse Leakage Current when VOUT > VIN

    • Over-Temperature Protection

    • Available in a Green WLCSP-1.21×1.21-9B Package

    • -40 to +85 Operating Temperature Range


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    Part NumberStatusPackagePinsPb-FreeTemp Range
    SGM66055A-5.4YG/TRProductionWLCSP-1.21×1.21-9B9Y-40℃ to +85℃
    SGM66055A-5.0YG/TRProductionWLCSP-1.21×1.21-9B9Y-40℃ to +85℃