Digital switching voltage regulator
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United States of America Patent
Stats
-
Aug 7, 1990
Grant Date -
N/A
app pub date -
Sep 11, 1988
filing date -
Sep 11, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved digital switching voltage regulator 10 for providing a regulated voltage having a well defined steady state ripple component is disclosed herein. The improved voltage regulator 10 of the present invention includes a control circuit 25 for providing a first output voltage and at least one shift pulse when the voltage across a load 21 operatively coupled to the regulator 10 departs from a voltage regulation window by crossing an upper threshold voltage thereof. The control circuit 25 also provides a second output voltage and at least one shift pulse when the load voltage departs from the voltage regulation window by crossing a lower voltage threshold thereof. A bi-directional shift register 50 generates a set of control voltages in response to the output voltage of the control circuit 40 and the shift pulse. Current is provided to the load 21 by an array 70 of switchable current sources in response to the set of control voltages.
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