A Low Dropout Linear Regulator Circuit Against Single Event Transient Effect
A linear voltage regulator and anti-single event technology, which is applied in the direction of instruments, electric variable adjustment, control/regulation systems, etc., can solve the problems of load circuit function failure, device damage, etc., and achieve the effect of attenuation and fluctuation reduction
Active Publication Date: 2020-02-21
BEIJING MXTRONICS CORP +1
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Problems solved by technology
VDDLV provides power for the load circuit (Load), and drastic changes in VDDLV will cause the function of the load circuit to fail, and even cause device damage
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[0033] Such as figure 1 Shown is an existing low-dropout linear regulator LDO circuit including a reference source circuit 11 , an error amplifier circuit 12 , a PMOS power transistor 13 , and a voltage divider circuit composed of resistors 14 and 15 . In a space environment, the reference source circuit 11 and the error amplifier circuit 12 will be interfered by a single event, causing large fluctuations in the output of the LDO circuit, which may lead to errors in the load operation, and in severe cases will cause the load to fail.
[0034] Such as figure 2 A low-dropout linear regulator circuit with anti-single event transient effect shown includes a reference source circuit 21, an RC filter circuit 22, an error amplifier circuit 23, a power tube network 24, a resistor divider circuit 25, and a limiter circuit 26 ;
[0035] The reference source circuit provides a reference voltage VREF;
[0036] The error amplifier circuit makes a difference between the reference voltag...
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The invention relates to a LDO (low dropout) linear regulator circuit capable of resisting an SET (single event transient) effect. The circuit mainly comprises a reference source circuit, an error amplifier circuit, a resistive bleeder circuit, an RC filter circuit, a power tube network and an amplitude limiting circuit, wherein the power tube network consists of multiple small-size power tubes connected through transmission gates to form certain propagation delay, and the power tube network can reduce the variation amplitude of LDO output signals due to sudden change of output signals of an error amplifier; the amplitude limiting circuit consists of multiple diodes connected in series, is connected to an output end of the LDO and limits the amplitude of output of the LDO. The effects of the SET effect in radiation environments can be reduced or avoided, the output voltage of the LDO is ensured to be stable, the system reliability is improved, and the LDO circuit has the advantages that the LDO circuit is simple in structure and convenient to implement, only a few circuits are required to be added to a common circuit and the like.
Description
technical field [0001] The invention relates to a CMOS technology-based anti-single event transient (SET) effect low-drop linear regulator (LDO) circuit, which belongs to the field of integrated circuit design. Background technique [0002] With the continuous shrinking of the feature size of integrated circuits, the single event transient (SET) effect caused by the impact of high-energy particles in the space radiation environment cannot be ignored. Low-dropout linear regulator LDO can convert high input voltage to low output voltage, and is widely used in system-on-chip (SoC) and various single-supply systems. A stable power module is the key to ensure the stable operation of the system. The single event transient (SET) effect will cause a drastic change in the output of the LDO, which will cause errors or even paralysis of the entire system. [0003] Common LDO circuits such as figure 1 As shown, it consists of a reference source, an error amplifier, a power transistor ...
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IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 韩旭鹏王亮边强石屹陆时进李全利
Owner BEIJING MXTRONICS CORP