Frequency scaled gear train switching voltage regulator and switched dc-to-dc converter

Abstract

A frequency scaled gear train switching voltage regulator and charge feedback integrated circuit includes cascaded capacitive cells configured such that flying capacitance of a given stage does not commence gathering new charge until the flying capacitor of a next stage retrieves a present stored charge of the given stage. A recursive resonant switched capacitor DC to DC converter allocates capacitance and conductance of a plurality of capacitive switching stages to minimize resonant frequency changes

1 . A frequency scaled gear train switching voltage regulator and charge feedback integrated circuit, comprising cascaded capacitive cells configured such that flying capacitance of a given stage does not commence gathering new charge until the flying capacitor of a next stage retrieves a present stored charge of the given stage. 
     
     
         2 . The circuit of  claim 1 , wherein said capacitive cells have no bypass capacitors and the next stage operates at at least twice the frequency of the given stage. 
     
     
         3 . The circuit of  claim 1 , wherein each of said capacitive cells includes four switches and one capacitor, and does not require any extra bypass capacitor or out of phasing implementation. 
     
     
         4 . The circuit of  claim 3 , wherein each cell is operated from two non-overlapping clock phases. 
     
     
         5 . The circuit of  claim 2 , wherein each of said capacitive cells comprises two out-of-phase 2:1 SC converters. 
     
     
         6 . The circuit of  claim 1 , wherein said capacitive cells have no bypass capacitors and a next capacitive cell operates at a frequency larger than the frequency of a previous capacitive cell. 
     
     
         7 . The circuit of  claim 1 , wherein said capacitive cells have no bypass capacitors and a next capacitive cell operates at a frequency smaller than the frequency of a previous capacitive cell. 
     
     
         8 . The circuit of  claim 1 , further comprising a switching voltage regulator shared among two or more of the cascaded capacitive cells. 
     
     
         9 . The circuit of  claim 1 , wherein said cascaded capacitive cells are configurable to provide step down conversion. 
     
     
         10 . The circuit of  claim 1 , wherein said cascaded capacitive cells are configurable to provide step up conversion. 
     
     
         11 . A frequency scaled gear train switching voltage regulator and charge feedback integrated circuit having two independent SC converters that can be operated separately with one disabled, in parallel, or independently together. 
     
     
         12 . A recursive resonant switched capacitor DC to DC converter comprising:
 a plurality of capacitive switching stages, wherein each stage lacks a inductor and a final stage is coupled to an output inductor; and   a switching controller to switch stages prior to the final stage at a progressively divided frequency from the resonant frequency;   wherein capacitance and conductance of the plurality of capacitive switching stages are allocated to minimize resonant frequency changes.