Circuit structure for reducing low dropout (LDO) power supply static current and control method of circuit structure
A technology of quiescent current and line structure, which is applied in the direction of control/regulation system, adjustment of electrical variables, instruments, etc., can solve the difficult problems of increasing the magnification of the horizontal PNP tube, increasing the power consumption of the device, reducing the power efficiency of the device, etc., to achieve the reduction Power supply quiescent current, the effect of improving output power efficiency
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[0027] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.
[0028] The present invention adopts the horizontal PNP as the circuit structure for reducing the quiescent current of the LDO power supply, including a start-up module, a loop control module, a power output circuit for reducing the quiescent current of the power supply, and a current-limiting control circuit. Among them, the power output line for reducing the quiescent current of the power supply is composed of PNP bipolar transistors Q1, Q3, Q4, Q8, Q9, R2 and NPN bipolar transistors Q7, Q10, and the current limiting control circuit is composed of resistor R1, PNP bipolar transistors Pole transistor Q2 and NPN type bipolar transistors Q5 and Q6, the loop control block module includes a bandgap reference, an error amplifier and other circuit structures in addition to the loop control circuit. ...
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