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Linear voltage regulating circuit adaptable to a logic system

A linear voltage regulation, linear voltage technology, applied in the field of logic systems

Inactive Publication Date: 2013-07-03
SKYMEDI CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, it is urgent to propose a novel linear voltage regulation circuit to overcome the above shortcomings without sacrificing the performance of voltage regulation

Method used

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  • Linear voltage regulating circuit adaptable to a logic system
  • Linear voltage regulating circuit adaptable to a logic system
  • Linear voltage regulating circuit adaptable to a logic system

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Embodiment Construction

[0033] figure 1 A block diagram of a linear voltage regulator circuit with load regulation is shown, which is applicable to the logic system 10 , according to an embodiment of the present invention. The logic system 10 is operable in a normal mode with full power or a low power mode with reduced power (eg, standby mode).

[0034] In this embodiment, the linear voltage regulator circuit includes a first linear voltage regulator 11 and a second linear voltage regulator 12 . The load driving capability (or load current) of the first linear voltage regulator 11 is higher than that of the second linear voltage regulator 12 . For example, the load current of the first linear voltage regulator 11 is tens or hundreds of milliamps (mA), while the load current of the second linear voltage regulator 12 is only several milliamperes. In other words, in normal mode, the power consumption of the first linear voltage regulator 11 is generally greater than that of the second linear voltage r...

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Abstract

A linear voltage regulating circuit adaptable to a logic system is disclosed. A first linear voltage regulator receives an input voltage and a first reference voltage. A second linear voltage regulator has a load driving capability lower than the first linear voltage regulator, and the second linear voltage regulator receives the input voltage and a second reference voltage. An output node of the first linear voltage regulator and an output node of the second linear voltage regulator are directly connected at a single common output node. A single common capacitor is connected between the common output node and a ground.

Description

technical field [0001] The invention relates to a linear voltage regulating circuit, in particular to a linear voltage regulating circuit with load regulation, which is applicable to logic systems. Background technique [0002] A voltage regulator is often used to maintain a fixed voltage level, and a linear voltage regulator is a type of voltage regulator that operates in the linear region of a transistor. [0003] Since linear voltage regulators are generally designed to meet high load current, stable frequency response and low dropout voltage, their current consumption cannot be effectively reduced. In view of this, an additional linear voltage regulator with low load current and low power consumption is usually used in standby mode to achieve load regulation. However, it requires additional output nodes and passive components (such as compensation capacitors), thereby increasing the associated cost and circuit area. Furthermore, an additional switch is required to swit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/56G05F1/563
Inventor 邵文彬
Owner SKYMEDI CORPORATION