Flexible load current dependent feedback compensation for linear regulators utilizing ultra-low bypass capacitances

Flexible load current dependent feedback compensation for linear regulators utilizing ultra-low bypass capacitances

The present document relates to linear regulators or linear voltage regulators configured to provide a constant output voltage. In particular, the present document relates to low-dropout (LDO) regulators having low output capacitance. A linear regulator (500, 1000) configured to regulate an output v...

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Hauptverfasser: WEIS, MARCUS, LIU, LIU, DREBINGER, STEPHAN
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Sprache:eng ; fre ; ger
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CONTROLLING
PHYSICS
REGULATING
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
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LIU, LIU
DREBINGER, STEPHAN
description The present document relates to linear regulators or linear voltage regulators configured to provide a constant output voltage. In particular, the present document relates to low-dropout (LDO) regulators having low output capacitance. A linear regulator (500, 1000) configured to regulate an output voltage subject to a reference voltage (108) is described. The regulator comprises a differential amplification stage (101) configured to amplify a difference, at an input of the differential amplification stage (101), between the reference voltage (108) and a measure (107) of the output voltage, thereby yielding a drive current at an output of the differential amplification stage (101); a subsequent output amplification stage (103) configured to provide the regulated output voltage and a output current at an output of the output amplification stage (103), based on a drive voltage at an input of the output amplification stage (103); and a first output current feedback loop (501, 502, 503) configured to sense the output current; and feed back a first coupling current derived from the sensed output current to a first intermediate point between the output of the differential amplification stage (101) and the input of the output amplification stage (103); wherein the drive voltage is dependent on the drive current and the first coupling current.
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In particular, the present document relates to low-dropout (LDO) regulators having low output capacitance. A linear regulator (500, 1000) configured to regulate an output voltage subject to a reference voltage (108) is described. 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The regulator comprises a differential amplification stage (101) configured to amplify a difference, at an input of the differential amplification stage (101), between the reference voltage (108) and a measure (107) of the output voltage, thereby yielding a drive current at an output of the differential amplification stage (101); a subsequent output amplification stage (103) configured to provide the regulated output voltage and a output current at an output of the output amplification stage (103), based on a drive voltage at an input of the output amplification stage (103); and a first output current feedback loop (501, 502, 503) configured to sense the output current; and feed back a first coupling current derived from the sensed output current to a first intermediate point between the output of the differential amplification stage (101) and the input of the output amplification stage (103); wherein the drive voltage is dependent on the drive current and the first coupling current.</abstract><oa>free_for_read</oa></addata></record>
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subjects CONTROLLING
PHYSICS
REGULATING
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
title Flexible load current dependent feedback compensation for linear regulators utilizing ultra-low bypass capacitances
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