Linear voltage-stabilizing device

Abstract

The invention relates to a linear voltage-stabilizing device. The linear voltage-stabilizing device comprises a battery, a linear voltage regulator and reference voltage sources, all of which are connected in order. The device further comprises a degenerate state detection circuit connected with the linear voltage regulator and the reference voltage sources. The linear voltage regulator is used for providing power sources to the reference voltage sources. The reference voltage sources are used for providing reference voltage sources required by the linear voltage regulator. The degenerate state detection circuit is used for detecting working states of the reference voltage sources and controlling the working states of the linear voltage regulator. The working states of the reference voltage sources comprise a degenerate state and a normal state. The linear voltage-stabilizing device has following beneficial effects: the technical scheme helps decrease the area and power consumption of a chip; process floating and deviation caused by the distance, the direction and other non-ideal factors for the two reference voltage sources are effectively reduced, thereby avoiding performance reduction of deviation-induced other circuits.

Description

technical field [0001] The invention relates to the technical field of linear voltage stabilizers, in particular to a linear voltage stabilizing device. Background technique [0002] Traditional circuits or modules connected to the battery voltage usually have two reference circuits, one of which is directly connected to the battery output voltage, and its main purpose is to provide a reference voltage for a linear regulated source. In addition, the reference circuit needs to be able to withstand a higher power supply voltage and a larger voltage variation range, so the accuracy of the output voltage is generally low. The power supply of another reference circuit uses the output voltage of a linear regulated source. Since the output voltage of the linear regulated source is relatively stable, the reference circuit has relatively loose requirements on the power supply voltage, but it often needs to provide higher output voltage accuracy. . In the design of the first referen...

AI Technical Summary

Problems solved by technology

In the design of the first reference reference circuit, in order to withstand a higher power supply voltage, it is often necessary to adopt the method of stacking transistors to reduce the reliability requirements of high voltage on the transistor; in addition, because the reference reference circuit often adopts a bandgap reference structure , so it generally takes up a larger area; and in the design of the second reference reference circuit, although the withstand voltage requirement is not high, in order to achieve better performance, the reference reference circuit generally uses a diode with a larger area to achieve high Therefore, designing two reference circuits with different requirements will not only greatly increase the chip area and power consumption, but also increase the cost, and the design difficulty will also increase.

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