Voltage regulating device with feedback for current inversion
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United States of America Patent
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Dec 1, 2015
Grant Date -
Aug 7, 2014
app pub date -
Aug 14, 2012
filing date -
Sep 16, 2011
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Abstract
A power source and a mobile device include a voltage regulating device, VRD. VRD's power stage, PS, has an inductor between a first node and a second node, a first switch between the first node and a non-zero potential of constant polarity, a first capacitor between a reference potential, Vref, and a second switch coupled to the first node, a second capacitor between Vref and a third switch coupled to the second node, a fourth switch between the second node and Vref, a fifth switch between the first node and Vref, and a comparator connected to detect an inversion of current in the inductor. The PS outputs the voltages across the first and the second capacitor and an inversion signal. Inversion detection triggers VRD's control circuit to send control signals causing the PS to close the fourth and fifth switches and to open the first, second and third switches.
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