Voltage regulator with improved line regulation transient response
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United States of America Patent
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Oct 10, 2017
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app pub date -
Feb 3, 2016
filing date -
Feb 3, 2016
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Abstract
A significant reduction of the amplitude of the transient response is obtained by keeping a low dropout regulator circuit in a closed loop condition. This is achieved by manipulation of the reference voltage level when an open loop condition arises due to a falling input voltage. In this case, the reference voltage level is tracked with the input voltage level, keeping the output voltage regulated. As a consequence, the power pass element of the regulator is not forced into the linear region (in the case of a MOSFET) or deep saturation (in the case of a bipolar transistor).
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