Low dropout regulator (LDO) integrated with slew rate intensifier circuit

Abstract

The invention relates to a power supply management technology, solves the problem that the output voltage spike of a conventional low dropout regulator is solved through increasing the circuit complexity, reducing the load capacity and increasing the output voltage, and provides a low dropout regulator (LDO) integrated with slew rate intensifier circuit. The technical scheme adopted by the invention is summarized as follows: compared with a conventional LDO, a slew rate intensifier circuit and a compensation capacitor are additionally arranged, the negative phase input end of an error amplifier is connected with a reference voltage source, the positive phase input end of the error amplifier is connected with a resistance feedback circuit, and the output end of the error amplifier is connected with the input end of the slew rate intensifier circuit; the output end of the slew rate intensifier circuit is connected with a grid electrode of a compensating pipe; one end of the compensation capacitor is connected with the positive phase input end of the error amplifier, and the other end of the compensation capacitor is connected with the output end. The LDO integrated with the slew rate intensifier circuit has the benefit that the transient response is improved, and is applicable to the low dropout regulator.

Description

technical field [0001] The invention relates to power management technology, in particular to the technology of low-dropout linear regulator. Background technique [0002] Low Dropout Regulator (LDO, Low Dropout Regulator) is an important circuit in the field of power management. It has the advantages of low output noise, low cost, simple structure, and low power consumption. It is widely used in electronic systems. With the continuous improvement of power supply requirements of many portable electronic systems, traditional LDOs can no longer meet people's requirements for chip noise, power supply rejection, and transient performance. Therefore, the study of high-performance LDO has become a research hotspot in the field of power management. [0003] Such as figure 1 As shown, a typical LDO circuit is generally composed of a reference voltage source Vref, an error amplifier, a power supply voltage input terminal VDD, a regulator tube Mp, and a resistor feedback circuit. Th...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the current low dropout linear regulators that mostly solve the problem of output voltage spikes at the cost of increasing circuit complexity, reducing load capacity, and increasing output voltage noise, and provides an integrated slew rate enhancement circuit. Low Dropout Linear Regulators

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