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    High Current Synchronous Step-Up Converter with Adjustable Current Limit
    High Current Synchronous Step-Up Converter with Adjustable Current Limit

    The SGM6609 is a high current, synchronous step-up converter with programmable low-side MOSFET peak current limit of 500mA to 3.5A. It is ideal for preventing input current from overloading system power in PCI-E card applications based on WCDMA/Edge/GPRS/ TD-SCDMA, PCI-E card GSM high load pulse applications. With a suitable ultra-cap or super-cap, the SGM6609 ensures that output voltage meets load power requirements when large load pulses are applied. It is also ideal for CDMA/Evdo-A/Evdo-B and other industry modem continuous load current applications.

    The output voltage of the SGM6609 is programmed from 3.0V to 5.0V by an external resistive divider. Optimized internal compensation provides fast transient response with no external components. Light load switching frequency modulation and low quiescent current maintains high efficiency performance for light load mode conditions.

    The low-side power MOSFET peak current limit of 500mA to 3.5A is set via an external resistor to protect the system power from overload.

    Reverse blocking is integrated to prevent current from flowing back to the input. The SGM6609's true load disconnect function isolates the output from the input when the device is disabled. Output over-voltage, short-circuit, and over-temperature protection are also integrated to protect the SGM6609 from these fault conditions.

    The SGM6609 is available in a Green TDFN-3×3-12L package and is rated over the -40 to +85 temperature range.



    • 2.4V to 5.0V Input Voltage Range

    • Adjustable 3.0V to 5.0V Output Voltage

    • Programmable NMOS Peak Current Limit: 500mA to 3.5A

    • Synchronous Boost Rectification and Internal Compensation

    • 1.2MHz Switching Frequency

    • Reverse Current Blocking

    • True Load Disconnect in Shutdown

    • Up to 95%Efficiency

    • Power-Good Indication

    • Programmable Over-Voltage Protection

    • Over-Temperature and Short-Circuit Protection

    • Available in a Green TDFN-3×3-12L Package

    • -40 to +85 Operating Temperature Range


    PC Cards (PCMCIA) Modems

    PCI-E Modem Cards



    Industry Modems

    USB Modems

    Part NumberStatusPackagePinsPb-FreeTemp Range
    SGM6609YTDF12G/TRProductionTDFN-3×3-12L12Y-40℃ to +85℃