GENERAL DESCRIPTION
The ADP3422 is a hysteretic dc-dc buck converter controller to power a mobile processor’s core. The optimized low voltage design is powered from the 3.3 V system supply. The output voltage is set by a 5-bit VID code. To accommodate the transition time required by the newest processors for on-the-fly VID changes, the ADP3422 features high-speed operation to allow a minimized inductor size that results in the fastest change of current to the output. To further allow for the minimum number of output capacitors to be used, the ADP3422 features active voltage positioning that can be optimally compensated to ensure a superior load transient response. The output signal interfaces with the ADP3415 MOSFET driver that is optimized for high speed and high efficiency for driving both the upper and lower (synchronous) MOSFETs of the buck converter.

FEATURES
   Certified IMVP-II Controller
   Excellent Transient Containment
   Minimum Number of Output Capacitors
   Fast, Smooth, Output Transition During VID Code Change
   Current Limit with Hiccup Protection
   Transient-Glitch-Free Power Good
   Low Shutdown Current
   Soft Start Eliminates In-Rush Current Surge
   Adaptive Noise-Blanking Enhancement for Speed and
      Stability
   Highly Redundant Over-Voltage and Reverse-Voltage
      Protection
   Controls Synchronous Rectifier for Improved Battery Life
  
APPLICATIONS
   IMVP-II Enabled Core DC/DC Converters
   Fixed-Voltage Mobile CPU Core DC/DC Converters
   Notebook/Laptop Power Supplies
   Programmable Output Power Supplies