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This paper presents a low-ripple voltage-controlled charge pump regulator intended to feed internal blocks in a chip to guarantee regular operation when the power supply voltage drops below some predefined value. The circuit was implemented using an array of voltage doubler with a regulation system improved by a voltagecontrolled oscillator in the feedback path and a voltage ripple minimization technique. The circuit size is 0.556 mm2 when fabricated in a 0.25µm CMOS technology and can supply loads consuming up to 8mA from 1.6V to 2.3V of power supply.

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