Current transient response enhancement structure and low dropout linear regulator
By introducing a current transient response enhancement structure into the low dropout linear regulator, and using a current mirror to couple the differential input stage current and drive the gate of the regulating transistor, the problems of slow transient response and failure under low input voltage of the low dropout linear regulator during load current changes are solved, achieving fast voltage recovery and improved stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- INST OF MICROELECTRONICS CHINESE ACAD OF SCI LTD
- Filing Date
- 2026-04-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing low-dropout linear regulators have slow transient response when the load current changes abruptly, resulting in large output voltage fluctuations. They are also prone to failure under low input voltage conditions, limiting their application in wide input power supply scenarios.
A current transient response enhancement structure is adopted, including an error amplifier and a transient response enhancement circuit identical to its output stage. The differential input stage current is coupled through a current mirror and driven in parallel with the error amplifier to improve the gate charging and discharging speed.
Without affecting the static operating point of the main loop, the transient response speed of the low dropout linear regulator is significantly improved, output voltage fluctuations are reduced, and stable operation under low input voltage conditions is ensured.
Smart Images
Figure CN122411701A_ABST