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 ADOPT****TM ****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**