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    SGM41283

    70V Step-Up Converter with APD Current Monitor
     
    70V Step-Up Converter with APD Current Monitor
    GENERAL DESCRIPTION

    The SGM41283 is a monolithic step-up converter that integrates a power switch and a biased avalanche photodiode (APD) current monitor. The device can double the output voltage through the APD optical receivers. The SGM41283 can provide up to 70V output.

    The SGM41283 uses a current-mode, fixed-frequency architecture to regulate the output voltage, which provides a fast transient response and cycle-by-cycle current limiting. The SGM41283 features two accurate APD current monitoring outputs with 10:1 and 2:1 ratios, respectively. Resistor-adjustable current limiting protects the APD from optical power transients.

    The SGM41283 includes over-current and thermal- overload protection to prevent damage in the event of an output overload.

    The SGM41283 is available in a Green TQFN-3×3-16L package. It operates over an ambient temperature range of -40 to +125.

    PIN CONFIGURATIONS

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    FEATURES
    • Input Voltage Range: 2.7V to 5.5V

    • 72V/0.6Ω NFET with 1.1A Limit

    • Up to 70V Output Voltage

    • 50ns APD Current Monitoring Response Speed

    • 850kHz Fixed Switching Frequency

    • Internal Compensation and Soft-Start

    • High-side APD Current Monitor with Less than ±5% Tolerance

    • High-side Current Monitor Ratios:10:1 and 2:1

    • Thermal-Shutdown Protection

    • Programmable APD Over-Current Limit and Protection

    • -40 to +125 Operating Temperature Range

    • Available in a Green TQFN-3×3-16L Package

    APPLICATIONS

    APD Biasing

    PIN Diode Biasing

    Optical Receivers and Modules

    Fiber-Optic-Network Equipment

    ORDERING INFORMATION
    Part NumberStatusPackagePinsPb-FreeTemp Range
    SGM41283XTQ16G/TRProductionTDFN-3×3-16L16Y-40℃ to +125℃

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