GENERAL DESCRIPTION
The ADP3170 is a highly efficient output synchronous buck switching regulator controller optimized for converting a 5 V main supply into the core supply voltage required by next generation Intel Celeron processors. The ADP3170 uses an internal 5-bit DAC to read a voltage identification (VID) code directly from the processor, which is used to set the output voltage between 1.05 V and 1.825 V. The ADP3170 uses a current mode, constant off-time architecture to drive two N-channel MOSFETs at a programmable switching frequency that can be optimized for regulator size and efficiency.
   
FEATURES
    Optimally Compensated Active Voltage Positioning
        with Gain and Offset Adjustment (ADOPT™) for
        Superior Load Transient Response
    Complies with VRM 8.5 Specifications with Lowest
    System Cost
    5-Bit Digitally Programmable 1.05 V to 1.825 V Output
    N-Channel Synchronous Buck Controller
    Onboard 1.8 V Linear Regulator Controller
    Total Accuracy ±1% Over Temperature
    High Efficiency Current-Mode Operation
    Short Circuit Protection
    Power Good Output
    Overvoltage Protection Crowbar Protects
        Microprocessors with No Additional External
        Components
   
APPLICATIONS
    Core and 1.8 V Standby Supplies for Next Generation
    Intel Pentium® III Processors