VOLTAGE REGULATOR CIRCUIT AND METHOD THEREFOR

A low drop out, LDO, voltage regulator circuit (200, 300) is that includes a high gain amplifier (205, 305) configured to receive a current biasing signal and arranged to regulate the voltage supply signal and output a regulated voltage supply signal (225, 325). A regulation adjustment circuit (222)...

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Bibliographische Detailangaben
1. Verfasser: Tourret, Jean-Robert
Format: Patent
Sprache:eng ; fre ; ger
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Beschreibung
Zusammenfassung:A low drop out, LDO, voltage regulator circuit (200, 300) is that includes a high gain amplifier (205, 305) configured to receive a current biasing signal and arranged to regulate the voltage supply signal and output a regulated voltage supply signal (225, 325). A regulation adjustment circuit (222) is operably coupled to an output of the high gain amplifier (205, 305) and includes a comparator (235, 245) configured to compare the output regulated voltage supply signal (225, 325) with a threshold, wherein an output of the comparator (235, 245) is configured to perform one of: (i) supply a dynamic current boost (212, 242) to the LDO current biasing signal, in response to the regulated voltage supply signal voltage dropping below the threshold; (ii) activate a dynamic current pull down circuit to reduce an over voltage output of the LDO voltage regulator circuit in response to the regulated voltage supply signal voltage exceeding the threshold.