Patent ID: 7268611
Filing Date: 2007-09-11
Classification: G11C,H01L,H02M

Abstract:
1. A semiconductor device comprising a plurality of stages of voltage booster circuits for potentially raising a power supply voltage up to a predetermined final output voltage, an output voltage control means connected to a voltage booster circuit adjacent to a final stage of said voltage booster circuits, and an internal element to which an output of said voltage booster circuits is supplied, wherein a first stage voltage booster circuit of said voltage booster circuits for raising the power supply voltage up to a primary voltage is formed of a converter circuit including an inductance element, a switching element and a diode, wherein voltage booster circuits in back of the first stage for raising said primary voltage up to the predetermined final voltage are each configured from a charge pump circuit including a capacitance element and a diode or a converter circuit including an inductance element, a switching element and a diode, wherein the inductance element and the switching element plus the diode making up said voltage booster circuit as well as said output voltage control means and said internal element are formed on a semiconductor substrate, and wherein said output voltage control means controls the voltage booster circuit near said final stage and supplies its output to said internal element.