GENERAL DESCRIPTION
The ADP3161 is a highly efficient dual output synchronous buck switching regulator controller optimized for converting a 5 V or 12 V main supply into the core supply voltage required by high-performance processors such as Pentium® III. The ADP3161 uses an internal 4-bit DAC to read a voltage identification (VID) code directly from the processor, which is used to set the output voltage between 1.3 V and 2.05 V. The ADP3161 uses a current mode PWM architecture to drive two logic-level outputs at a programmable switching frequency that can be optimized for VRM size and efficiency. The output signals are 180 degrees out of phase, allowing for the construction of two complementary buck switching stages.

FEATURES
   ADOPT™ Optimal Positioning Technology for Superior
      Load Transient Response and Fewest Output
      Capacitors
   Active Current Balancing Between Both Output Phases
   VRM 8.4-Compatible Digitally Programmable 1.3 V to
      2.05 V Output
   Dual Logic-Level PWM Outputs for Interface to External
      High-Power Drivers
   Total Output Accuracy ±0.8% Over Temperature
   Current-Mode Operation
   Short Circuit Protection
   Power-Good Output
   Overvoltage Protection Crowbar Protects
      Microprocessors with No Additional
      External Components

APPLICATIONS
   Desktop PC Power Supplies for:
      Intel Pentium® III Processors
      VRM Modules