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      2. FR9888A

        Description

        The FR9888A is a synchronous step-down DC/DC converter that provides wide input voltage range and 3A continuous load current capability.  The FR9888A fault protection includes cycle-by-cycle current limit, UVLO, output overvoltage protection and thermal shutdown. The adjustable soft-start function prevents inrush current at turn-on. This device uses current mode control scheme which provides fast transient response. Internal Compensation function reduces external compensation components and simplifies the design process. In shutdown mode, the supply current is less than 1μA.  The FR9888A is available in a SOP-8 Exposed Pad package, and provides good thermal conductance.

         
        Features

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        ● High Efficiency up to 91%
        ● Low RDS(ON) Integrated Power MOSFET
        ● Internal Compensation Function
        ● Wide Input Voltage Range up to 21V
        ● Adjustable Output Voltage from 0.925V to 14.5V
        ● 3A Output Current
        ● Fixed 1.2MHz Switching Frequency
        ● Current Mode Operation
        ● Adjustable Soft-Start
        ● Cycle-by-Cycle Current Limit
        ● Over-Temperature Protection with Auto Recovery
        ● Output Overvoltage Protection
        ● Under Voltage Lockout
        ● <1μA Shutdown Current
        ● SOP-8 Exposed Pad Package
         
        Applications
        ● STB (Set-Top-Box)
        ● LCD Display, TV
        ● Distributed Power System
        ● Networking, XDSL Modem
         

        Pin Assignments

        Ordering Information

         

         

        Typical Application Circuit

         
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