GENERAL DESCRIPTION
The ADP3203 is a 1- or 2-phase hysteretic peak current dc-to-dc buck converter controller dedicated to power a mobile processor’s core. The optimized low voltage design is powered from the 3.3 V system supply and draws only 10 µA maximum in shutdown. The nominal 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 ADP3203 features high speed operation to allow a minimized inductor size that results in the fastest change of current to the output.

FEATURES
Pin Selectable 1- or 2-Phase Operation
Static and Dynamic Current Sharing Characteristics
Backward Compatible to IMVP-II
Superior Load Transient Response with ADOPTTM Optimal Positioning Technology
Noise Blanking for Speed and Stability
Synchronous Rectifier Control Extends Battery Life
Smooth Output Transition During VID Code Change
Cycle-by-Cycle Current Limiting
Hiccup or Latched Overload Protection
Transient Glitch-Free Power Good
Soft Start Eliminates Power-On In-Rush Current Surge
2-Level Overvoltage and Reverse Voltage Protection

APPLICATIONS
IMVP-II and IMVP-III Core DC-to-DC Converters
Fixed Voltage Mobile CPU Core DC-to-DC Converters
Notebook/Laptop Power Supplies
Programmable Output Power Supplies