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          SGM6609

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

          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.

          PIN CONFIGURATIONS

          6609.png

          FEATURES
          • 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

          APPLICATIONS

          PC Cards (PCMCIA) Modems

          PCI-E Modem Cards

          WCDMA/Edge/GPRS/TD-SCDMA

          CDMA/Evdo-A/Evdo-B

          Industry Modems

          USB Modems

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

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