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ADP3203

Analog Devices
Part Number ADP3203
Manufacturer Analog Devices
Description 2-Phase IMVP-II & IMVP-III Core Controller
Published Mar 23, 2005
Detailed Description PRELIMINARY TECHNICAL DATA a Preliminary Technical Data FEATURES Pin Selectable 1 or 2-Phase Operation Backward Compati...
Datasheet PDF File ADP3203 PDF File

ADP3203
ADP3203

Overview
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 changes, the ADP3203 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 ADP3203 features active voltage positioning with ADOPTTM optimal compensation 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 top and bottom MOSF...


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