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Filling in/pulling out current rapid response linear voltage regulator and regulating method

A fast-response, linear voltage technology, applied in control/regulation systems, regulating electrical variables, instruments, etc., can solve the problems of poor response characteristics of LDO, inability to guarantee dynamic compensation, lack of LDO system, etc., and achieve fast load transient Responsive, novel design, ensure the effect of large load stability

Active Publication Date: 2010-11-24
深圳德信微电子有限公司
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Problems solved by technology

In some designs, due to the constraints of some parameters such as high power supply accuracy and quiescent current, the above-mentioned LDO system does not have a wide bandwidth or cannot guarantee dynamic compensation or limit the grid charging current of the output power transistor 304, resulting in the LDO Response characteristics will be poor

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  • Filling in/pulling out current rapid response linear voltage regulator and regulating method
  • Filling in/pulling out current rapid response linear voltage regulator and regulating method
  • Filling in/pulling out current rapid response linear voltage regulator and regulating method

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Embodiment Construction

[0049] Such as Figure 4 The shown sink / source current fast response linear voltage regulator includes a reference voltage source 101, an error amplifier 102 and an error amplifier 104 respectively connected to the reference voltage source 101, and an error amplifier 102 and The output terminal of the error amplifier 2 104 is connected to the N-channel MOS tube 103 and the N-channel MOS tube 105, and the static current used to control the quiescent current of the N-channel MOS tube 103 and the N-channel MOS tube 105 Control unit 106. The error amplifier 102 is composed of a comparator 102-1 and a current mirror 102-2, and the error amplifier 104 is composed of a comparator two 104-1 and a current mirror 104-2. The comparator one 102 Both the inverting input terminal of -1 and the non-inverting input terminal of the second comparator 104-1 are connected to the reference voltage source 101. The quiescent current control unit 106 is composed of a current summation unit 106-1, a s...

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Abstract

The invention discloses a filling in / pulling out current rapid response linear voltage regulator and a regulating method. The regulator comprises a reference voltage source, two error amplifiers, an N-channel MOS (Metal Oxide Semiconductor) tube I, an N-channel MOS tube II and a static current control unit. The static current control unit consists of a current summing unit, a pulling out current subtracting unit and a filling-in current subtracting unit. In the voltage regulating method, two error amplifiers dynamically monitor the voltage variation of a source electrode of the N-channel MOS tube I and a drain electrode of the N-channel MOS tube II when the pulling-out and filling-in current occur and dynamically control the gate-to-source voltage of two N-channel MOS tubes so that the source voltage of the N-channel MOS tube I and the drain voltage of the N-channel MOS tube II vary toward the same direction. The invention has novel and reasonable design, convenient circuit connection, small area of circular bard and good use effect, ensures the large-load stability and greatly improves the transient response of an LDO (Low Dropout Regulator).

Description

Technical field [0001] The invention relates to a low-dropout voltage regulator and a voltage regulation method thereof, and in particular to a linear voltage regulator and a regulation method for a fast-response current sinking / pulling current. Background technique [0002] LDO (Low dropout regulator) is used to generate a clean and well-regulated voltage source from a higher and noisy voltage source. It is a very widely used step-down DC-DC converter Device. Compared with the switching power supply DC-DC, it has the advantages of low cost, low noise and low quiescent current. At the same time, because it does not require switching action and inductance, it will not cause EMI problems, so it is widely used in battery-powered portable electronics. In equipment, especially in noise-sensitive systems. [0003] At the same time, with people's pursuit of high speed and multi-function for portable and noise-sensitive devices such as mobile phones, PDAs, and notebook computers, high-pr...

Claims

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Application Information

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IPC IPC(8): G05F1/56
Inventor 来新泉耿玮生李演明叶强李庆委
Owner 深圳德信微电子有限公司
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