LDO circuit, chip and electronic device
By introducing a current bias circuit into the LDO circuit, a fixed bias current is provided to control the quiescent current, which solves the problem of increased quiescent current caused by power supply voltage drop, thereby reducing quiescent power consumption and protecting the battery.
CN120686941BActive Publication Date: 2026-07-24SHANGHAI AWINIC TECH CO LTD
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI AWINIC TECH CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-07-24
AI Technical Summary
Technical Problem
In an LDO circuit, when the power supply voltage drops to a value where the difference between the power supply voltage and the output voltage is zero or negative, the quiescent current increases, causing the battery to discharge faster and resulting in battery damage.
Method used
A current bias circuit is introduced to provide a fixed bias current to control the quiescent current and prevent the quiescent current from increasing when the difference between the power supply voltage and the output voltage is less than a first voltage threshold.
Benefits of technology
It effectively reduces the static power consumption of the LDO circuit, slows down the battery discharge rate, reduces battery damage, and ensures circuit stability.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN120686941B_ABST
Abstract
The application relates to the technical field of circuits, and discloses an LDO circuit, a chip and electronic equipment. The LDO circuit comprises a current bias circuit, a driving circuit, a reference circuit and a power circuit; the current bias circuit comprises a current unit and a control unit, a first end of the current unit is used for being connected with a first end of the reference circuit, a first end of the power circuit and a power supply end, a second end of the current unit is connected with a first end of the control unit, a second end of the control unit is connected with a first end of the driving circuit, and a third end of the control unit is connected with a second end of the power circuit; a second end of the driving circuit is connected with a second end of the reference circuit; a third end of the power circuit is connected with an output end of the LDO circuit; wherein when a voltage difference between a power supply voltage of the power supply end and an output end voltage is less than a first voltage threshold, the driving circuit is in a conduction state, and the current unit outputs a fixed bias current to the control unit. In this way, the battery discharge speed can be reduced, and damage to the battery can be reduced.
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