CIRCUITS AND METHODS PROVIDING SUPPLY VOLTAGE CONTROL BASED ON TRANSIENT LOAD PREDICTION

摘要

An apparatus and method are disclosed for providing voltage control at a load of a buck converter. The buck converter is in a feedback loop so that a reference voltage determines a pulse width modulated (PWM) signal that is fed to the buck converter, and an output voltage of the buck converter is fed back to a PWM control circuit to maintain a value of the output voltage. The load at the buck converter provides event counters to a transient load current prediction circuit, which uses a curve fitting algorithm or other adaptive control algorithm to predict a change in current at the load. The transient load current prediction circuit then manipulates the reference voltage in accordance with the predicted change in current at the load.

主权项

1. A circuit comprising:
a voltage regulator configured to maintain an output voltage; a load in communication with the voltage regulator and configured to receive the output voltage, the load further configured to perform logic functions and to output data indicating computational activity at the load; a first feedback loop in communication with the output voltage and an input of the voltage regulator; and a second feedback loop in communication with the load and the voltage regulator and including a transient load current prediction circuit configured to calculate a predicted transient load current from the data indicating computational activity and to manipulate the output voltage in response to the predicted transient load current.