Anti-single event hardened digital low-dropout linear regulator and control method

Abstract

A Single Event Hardened Digital Low Dropout Linear Regulator. It is implemented in a digital way, including control circuit, fine adjustment comparator circuit, coarse adjustment comparator circuit, state decoding circuit, coarse adjustment shift chain, middle adjustment shift chain, fine adjustment shift chain, hold shift ring, Hold shift rings, pass transistor arrays, etc. blocks. By dividing the power supply process into three stages of coarse adjustment, medium adjustment, and fine adjustment, problems such as response speed and power supply ripple are solved: the fast search in the coarse adjustment stage can increase the response speed several times; the fine adjustment stage minimizes the standard of the pass transistor The width and length optimize the power ripple; the middle adjustment stage is the transition and buffer between coarse adjustment and fine adjustment. The radiation resistance of the circuit is reinforced by various methods such as reinforcement unit and system reinforcement.

Description

technical field [0001] The invention relates to a digitally-realized low-dropout linear voltage stabilizer and a control method for anti-single particle reinforcement, which belong to the technical field of integrated circuits. Background technique [0002] As the complexity of electronic systems increases, the types of internal power supplies in the system also become more diverse. Low-dropout linear regulator (LDO) can complete voltage conversion, so it is widely used. [0003] The traditional LDO works in an analog way, and its basic structure is as follows figure 1 shown. The operational amplifier is used to compare the output voltage Vout with the reference voltage Vref and generate a control signal, use BUF to increase the driving capability and then drive the pass transistor so that the output voltage Vout is equal to the reference voltage Vref. The pass transistor needs to supply all the current required by the load and is therefore very large. With the developme...

AI Technical Summary

Problems solved by technology

[0007] The technical problem solved by the present invention is: to overcome the deficiencies in the prior art, the digital low dropout linear voltage regulator and the control French method proposed by the present invention provide the response speed of the digital low dropout linear voltage regulator, minimize power supply ripple, and circuit complexity A compromise solution to design issues such as , power consumption, etc.

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