A non-external capacitor LDO transient response enhancement circuit
A technology without off-chip capacitors and transient response, applied in the direction of adjusting electrical variables, instruments, control/regulation systems, etc., can solve the problems of slow transient response speed of LDO, large overshoot voltage, poor transient response characteristics, etc. To achieve the effect of improving the transient response
Active Publication Date: 2022-06-24
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Due to the large size of the power tube, a large gate parasitic capacitance will be generated, which makes the transient response speed of the LDO slow, and when the load current jumps, there is no large capacitor to provide or store additional output current, so that the LDO The output terminal produces a large overshoot voltage, so the transient response characteristics of LDO without off-chip capacitor are worse than that of traditional LDO
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these examples are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.
[0022] Embodiments of the present invention relate to an off-chip capacitor-less LDO transient response enhancement circuit, including: an OTA circuit, including a first branch and a second branch, wherein the first branch and the second branch are generated in The current jump will be generated when the overshoot voltage and the undershoot voltage are generated; the undershoot detection voltage branch is connected to the first ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention relates to an LDO transient response enhancement circuit without an external capacitor, comprising: an OTA circuit, including a first branch and a second branch, and the first branch and the second branch generate an overshoot voltage and A current jump will occur when the voltage is undershot; the undershoot detection voltage branch is connected to the first branch and the second branch respectively, and is used to jump according to the current jump generated by the first branch and the second branch. variable control discharge branch; the discharge branch is used to provide a discharge path from the grid to the ground for the power tube; the overshoot detection voltage branch is connected to the first branch and the second branch respectively, and is used to The charging branch is controlled according to the current jump generated by the first branch and the second branch; the charging branch is used to provide a charging path from the power supply to the grid for the power tube. The invention can significantly improve the transient response of the LDO.
Description
technical field [0001] The invention relates to the technical field of LDO transient response enhancement, in particular to an LDO transient response enhancement circuit without off-chip capacitance. Background technique [0002] Low dropout linear regulator (LDO) is a kind of power management chip technology, its structure is simple, output noise and ripple are small, suitable for noise-sensitive systems. In addition, because LDO has the characteristics of small size and simple application, it is gradually widely used in portable electronic products, and has become one of the necessary modules for power management of electronic systems. [0003] The transient response of LDO includes power transient response and load transient response, which means that when the LDO supply voltage or load current jumps, the LDO output voltage will change; then the LDO chip uses its own linear negative feedback system to make the output The process by which the voltage returns to a stable v...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G05F3/26
CPCG05F3/26
Inventor 沈洁王倩李喜陈后鹏宋志棠
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI