A 32nm fully integrated reconfigurable switched-capacitor DC-DC converter delivering 0.55W/mm<sup>2</sup> at 81% efficiency

Abstract

A fully integrated switched-capacitor DC-DC converter with 32-phase interleaving is implemented in 0.374 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> of a 32 nm SOI process. The converter can be reconfigured into three topologies to support 0.5 to 1.2 V output from a 2 V input supply, and achieves a maximum efficiency of 77% at an output power density of 0.55 W/mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> .