Abstract: A band gap voltage reference circuit includes a high power band gap (BG) circuit that generates a BG voltage potential VbgH. A low power BG circuit includes a variable resistance and outputs a BG voltage potential VbgL that is related to a value of the variable resistance. The low power BG circuit has a lower accuracy than the high power BG circuit. A calibration circuit communicates with the high and low power BG circuits, adjusts the variable resistance based on a difference between the BG voltage potential VbgH and the BG voltage potential VbgL, and shuts down the high power BG circuit when the BG voltage potential VbgL is approximately equal to the BG voltage potential VbgH.

Abstract: A digital controller for controlling an output regulator. The digital controller having sub-blocks for providing functions to control the output regulator. An energy saving discontinuous mode (ESDM) controller to monitor a sense point of the output regulator. The sense point to indicate a power state of the output regulator and the ESDM controller to control a flow of power to the sub-blocks to control power consumption of the digital controller as a function of the power state of the output regulator.

Abstract: A duty cycle estimator for determining a nominal duty cycle of an output regulator. The duty cycle estimator having at least two modes and including at least a mode one estimator and a mode two estimator. The mode one estimator to determine the nominal duty cycle as a function of prior duty cycles. The mode two estimator to determine the nominal duty cycle as a function of accumulated error. A mode selector, based on a mode selection criteria, to select a one of the at least two modes to generate the nominal duty cycle.

Abstract: A duty cycle limiter for limiting a transfer of energy between an input source and a regulated output of an output regulator. The output regulator having a regulator characteristic and a computed duty cycle for controlling the transfer of energy between the input source and the regulated output. The duty cycle limiter including a digital controller to generate a reference level and to compare the regulator characteristic of the output regulator to the reference level to determine a maximum duty cycle. The digital controller to control the reference level at a frequency at least equal to a switching frequency of the output regulator. The digital controller to limit the computed duty cycle to the maximum duty cycle.

Abstract: A digital controller for controlling a regulated output of an output regulator. The output regulator responsive to a pulse width signal for controlling the transfer of energy between an input source and the regulated output. The digital controller including a duty cycle estimator to determine a nominal duty cycle. An adjust determiner to determine an adjustment value to combine with the nominal duty cycle to generate an adjusted duty cycle. The pulse width signal being a function of the adjusted duty cycle.

Abstract: A circuit for generating a feedback signal corresponding to a regulated output. The circuit including a reference generator to generate at least two reference levels, the reference levels to define at least three reference ranges. A comparator to compare the regulated output to the at least three reference ranges. The comparator to generate a digital signal to indicate within which of the at least three reference ranges the regulated output is included.

Abstract: A power array for converting an input voltage to a chopped output used in an output regulator that converts the chopped output to a regulated output. The power array including a switch array, responsive to independent drive signals, to convert the input voltage to the chopped output at a switching frequency. The switch array including at least two power switches. A switch controller to generate the independent drive signals as a function of a duty cycle signal. The switch controller to operate at a sampling frequency, the sampling frequency being greater than the switching frequency. The switch controller to control the independent drive signals at a drive frequency greater than the switching frequency.

Abstract: A control system to control an output regulator. The output regulator to convert an input voltage to a regulated output. The output regulator including a power stage to generate a power output from the input voltage and an output filter to filter the power output to generate the regulated output. A digital controller, responsive to a sense signal corresponding to the regulated output, to generate a drive signal to control the power stage.

Abstract: An output regulator to convert an input voltage to a regulated output. The output regulator including a power stage to generate a power output from the input voltage. An output filter to filter the power output to generate the regulated output. An output sensor to generate a digital sense signal to indicate within which of at least three reference ranges the regulated output is included. Each of the at least three reference ranges including a plurality of possible values of the regulated output. A digital controller, responsive to the digital sense signal, to generate a drive signal to control the power stage.

Abstract: A control system for controlling an output regulator having a regulated output. The control system including an output sensor to generate a digital sense signal to indicate within which of at least three reference ranges the regulated output is included. Each of the at least three reference ranges including a plurality of possible values of the regulated output. A digital controller, responsive to the digital sense signal, to generate a drive signal to control the regulated output.