A 12 nA Ultra-Low Quiescent Current Capacitor-Less LDO with 350 ns Fast Transient Response
- Resource Type
- Conference
- Authors
- Yan, Nixiao; Zhang, Xin; Shi, Chunqi; Huang, Leilei; Chen, Guangsheng; Zhang, Runxi
- Source
- 2022 IEEE 4th International Conference on Circuits and Systems (ICCS) Circuits and Systems (ICCS), 2022 IEEE 4th International Conference on. :95-98 Sep, 2022
- Subject
- Components, Circuits, Devices and Systems
Transient response
Regulators
Power supplies
Simulation
Power transistors
Energy efficiency
Topology
capacitor-less low-dropout (CL-LDO) regulator
ultra-low quiescent current
settling time
transient response
- Language
This paper presents an output capacitor-less, dual power transistors low-dropout (LDO) regulator with ultra-low quiescent current in 55 nm CMOS process. The LDO employs an adaptive stage to make the LDO a two-stage topology at light load and a three-stage topology at heavy load. A co-enhanced transient circuit is introduced by adding the extra switching current to improve the slew rate without any quiescent current. The simulated results show that the LDO with a quiescent current of 12 nA and a power supply range from 2.5 to 3.6 V achieves a stable 1.2 V output. When the load current changes in steps of $10 \mu \mathrm{A} -20$ mA with a rise time and a fall time of 200 ns, the LDO can recover within 350 ns and 490 ns.