An adaptive voltage regulation circuit

Abstract

The invention belongs to the technical field of power supplies and relates to an adaptive voltage regulation circuit. The circuit of the present invention includes power transistors MP and MN, inductor L, capacitor C, first resistor RF1, second resistor RF2, analog phase lead compensation module, delay phase lag compensation module, critical path replication module, sawtooth wave generation module, comparison device, power tube drive. The output voltage Vout is divided by resistors Rf1 and Rf2. Operational amplifier, resistors R1 and R2, and capacitor Cc realize analog phase lead compensation. The operational transconductance amplifier GM load is RGM1, which provides the loop gain for APD compensation. The delay of critical path replication is compared with the system clock CLK by phase detection. Then, the delayed error signal is integrated by a charge pump. The output voltage VPD of the charge pump is connected to the positive input terminal of the transconductance amplifier GM. By comparing the sawtooth current generated by the oscillator OSC and the output current of the GM, the PWM waveform can be obtained. The invention greatly reduces the power loss of the digital circuit.

Description

technical field [0001] The invention belongs to the technical field of power supplies and relates to an adaptive voltage regulation circuit. Background technique [0002] The power consumption of integrated circuits becomes more and more important with the development of the performance of portable electronic products and the trend of thinner and smaller. Adaptive Voltage Scaling (AVS) is an effective power management technology proposed in recent years. AVS adjusts the frequency according to a certain strategy by monitoring the hardware, and adjusts the voltage adaptively based on the working conditions of the load, which can further reduce the power consumption of the load by 30-70%. A great feature of this technology is that it can reduce system power consumption without affecting system functions and various indicators. Unlike look-up table-based dynamic voltage scaling (DVS) methods, adaptive voltage scaling (AVS) technology uses time-domain error clock periods and cr...

AI Technical Summary

Problems solved by technology

[0003] The existing AVS technology currently has an AVS regulator based on pulse-skipping cycle modulation, which is characterized by a simple and effective structure, but at the same time has a limited load range and a large output voltage ripple problem; critical path replication (CPR) technology It is also used for delay quantization, but similar to the digital control adjustment period, its performance is limited by the non-linearity of output voltage quantization and loop delay; the combination of regulators and microprocessors through digital interfaces is also widely used, but its operating frequency tracking Speed ​​is easily limited by interface speed

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