ADP3203

PRELIMINARY TECHNICAL DATA a Preliminary Technical Data FEATURES Pin Selectable 1 or 2-Phase Operation Backward Compatible to IMVP-II Excellent Static and Dynamic Current Sharing Superior Load Transient Response with ADOPTTM Optimal Positioning Technology Noise-Blanking for Speed and Stability Synchronous Rectifier Control for Extended Battery Life Cycle-by-Cycle Current Limiting Hiccup or Latched Overload Protection Transient-Glitch-Free Power Good Soft Start Eliminates Power-On In-Rush Current Surge Two-Level Over-Voltage and Reverse-Voltage Protection APPLICATIONS IMVP II-III Core DC/DC Converters Fixed Voltage Mobile CPU Core DC/DC Converters Notebook/Laptop Power Supplies Programmable Output Power Supplies 2-Phase IMVP-II & IMVP-III Core Controller for Mobile CPUs ADP3203 FUNCTIONAL BLOCK DIAGRAM VCC 24 ADP3203 HYSSET 1 DSHIFT 2 BSHIFT 3 HYSTERESIS SETTING & SHIFT-MUX VR PHASE SPLITER 21 OUT2 20 OUT1 23 CS2 CLIM 22 CS1 CURRENT SENSE MUX CORE 27 CS+ 28 CS25 RAMP 26 REG EN VID4 4 VID3 VID2 VID1 VID0 5 6 7 8 DSLP BOM 5-BIT VID DAC & FIXED REF 18 DACOUT GENERAL DESCRIPTION VR The ADP3203 is a 1 or 2-phase hysteretic peak current DC-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 c...