Circuits and methods for dynamic voltage management

摘要

In one embodiment the present invention includes a circuit comprising a voltage adjust circuit and an input terminal of an electronic system. The voltage adjust circuit is coupled to receive an input voltage. The input terminal of the electronic system is coupled to receive a supply voltage from an output terminal of the voltage adjust circuit. The voltage adjust circuit makes an adjustment to the supply voltage based on a minimum voltage requirement of the electronic system. Accordingly, the leakage current supplied to the electronic system reduces, thereby saving power.

主权项

1. An electronic circuit comprising:
an input line configured to receive an input supply voltage; an output line configured to output an output supply voltage; a voltage drop device connected from the input line to the output line, wherein the voltage drop device is configured to produce a voltage drop from the input line to the output line; a switch connected in parallel with the voltage drop device; and a control circuit configured to:
open the switch in response to the input supply voltage exceeding a threshold voltage, for the output supply voltage to equal the input supply voltage minus the voltage drop; andclose the switch, to bypass the voltage drop, in response to the input supply voltage dropping below the threshold voltage;power an electronic device with the output supply voltage, andduring a power save mode of the electronic device, control the threshold voltage such that the threshold voltage is (i) set at a higher voltage level when the electronic device is in a normal mode and (ii) set at a lower voltage level when the electronic device is in the power saving mode.