A VOLTAGE REGULATOR CIRCUIT AND CORRESPONDING METHOD

摘要

A multi-output voltage regulator circuit (10), comprises:- at least one first voltage regulator (LDO1) having a first output voltage selection pin set (SEL1_LDO1, SEL2_LDO1, SEL3_LDO1) and configured produce a first output voltage (OUT_LDO1, Vo1) which is a function of a first digital signal received at the first output voltage selection pin set (SEL1_LDO1, SEL2_LDO1, SEL3_LDO1), and- at least one second voltage regulator (LDO2) having a second output voltage selection pin set (SEL1_LDO2, SEL2_LDO2, SEL3_LDO2) and configured to produce a second output voltage (OUT_LDO2, Vo2) which is a function of a second digital signal received at the second output voltage selection pin set (SEL1_LDO2, SEL2_LDO2, SEL3_LDO2).The first (LDO1) and second (LDO2) voltage regulators are operable in a voltage tracking mode with the output voltage (OUT_LDO2, Vo2) of the second voltage regulator (LDO2) tracking the output voltage (OUT_LDO1, Vo1) of the first voltage regulator (LDO1) when the digital signals received at the selection pin sets (SEL1_LDO1, SEL2_LDO1, SEL3_LDO1 and SEL1_LDO2, SEL2_LDO2, SEL3_LDO2) having a same digital value.An overvoltage sensor is provided to detect overvoltage events occurring at the at least one first voltage regulator (LDO1, Vo1) and control circuitry coupled to the overvoltage sensor is configured to avoid operation in the voltage tracking mode as a result of an overvoltage event detected at the first voltage regulator (LDO1.