Multiplexing LDO circuit realizing class A mode and class AB mode simultaneously
By designing a reused LDO circuit, employing a two-stage amplification structure and dynamic compensation technology, flexible switching between class A and class AB modes is achieved. This solves the problem that traditional LDO circuits cannot simultaneously achieve low power consumption and fast response, thus improving the circuit's adaptability and efficiency.
CN117572923BActive Publication Date: 2026-06-12PINGJIE ELECTRONIC TECHNOLOGY (JIANGSU) CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- PINGJIE ELECTRONIC TECHNOLOGY (JIANGSU) CO LTD
- Filing Date
- 2023-10-23
- Publication Date
- 2026-06-12
Smart Images
Figure CN117572923B_ABST
Abstract
The application discloses a multiplexing LDO circuit realizing class A mode and class AB mode simultaneously, which comprises two-stage amplification of the whole multiplexing LDO circuit, the first stage is a full differential circuit, and the second stage is an output stage; the output voltage of the first stage is connected to the input of the second stage; when the switch in the class transmission gate circuit is turned off, the multiplexing LDO circuit works in the class A mode; when the switch in the class transmission gate circuit is turned on, the multiplexing LDO circuit works in the class AB mode; the class transmission gate circuit controls the gate voltage of the P tube part of the class AB and the N tube part of the class AB respectively. The multiplexing LDO circuit can realize the multiplexing of the class A and class AB modes, can flexibly select the mode, and can maximize the low power consumption or high transient response.
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