A LOW DROP-OUT VOLTAGE REGULATOR AND A METHOD OF PROVIDING A REGULATED VOLTAGE

摘要

A low drop-out voltage regulator (100), an integrated circuit, a sensor and a method of providing a regulated voltage are provided. The low drop-out voltage regulator (100) comprises a regulated voltage driver (106, VD) for providing the regulated voltage (Vreg) in response to a control voltage (Vc), a feedback-loop circuit (112, FC) for generating the control signal (104, Vc) such that the regulated voltage driving circuit (106, VD) provides the regulated voltage (Vreg), and a pull-up circuit (108, PC) for pulling up the regulated voltage (Vreg) to a supply voltage (Vsup) when a difference between the supply voltage (Vsup) and the control voltage (Vc) is smaller than a predetermined threshold value. In the feedback-loop circuit (112, FC) a first feedback voltage (Vf1) or a second feedback voltage (Vf2) is generated, respectively, on basis of a first ratio and a second ratio between the feedback voltage and the regulated voltage (Vreg). The second feedback voltage (Vf2) is generated instead of the first feedback voltage (Vf1) when the regulated voltage (Vreg) is pulled-up to the supply voltage (Vsup).