Design of high-speed low-dropout output capacitorless regulator for digital systems
Power management has increased enormously in the electronic industry with the prosperity of portable applications such as smart phones, laptops and PADs. Each digital system needs many power management blocks to supply various subsystems to increase the system stability and prolong the operationa...
Saved in:
| 主要作者: | |
|---|---|
| 其他作者: | |
| 格式: | Theses and Dissertations |
| 語言: | English |
| 出版: |
2016
|
| 主題: | |
| 在線閱讀: | http://hdl.handle.net/10356/68743 |
| 標簽: |
添加標簽
沒有標簽, 成為第一個標記此記錄!
|
| 總結: | Power management has increased enormously in the electronic industry with the
prosperity of portable applications such as smart phones, laptops and PADs. Each digital
system needs many power management blocks to supply various subsystems to increase
the system stability and prolong the operational life time of the device. Low dropout
(LDO) voltage regulators are commonly used circuits to supply stable and low voltage
output. The traditional LDO regulator needs a large output capacitor, in the range of
microfarads, to reduce the output voltage variation. This will increase the chip pin
number and occupy a large area of the printed circuit board (PCB) which leads to the
increase of cost. Hence, an output capacitor-less LDO regulator is presented in this
dissertation.
The proposed LDO regulator adopts dual-loop structure with self-adaptive topology
and delay discharge circuit. It aims to apply for low-voltage systems that require fast transient
LDO regulator in heavy capacitor load environment. It is designed to operate
from 0.75V to 1.2V supply on the basis of UMC 65nm technology. It provides 0.5V
output voltage with 49.4 pA quiescent current. The output voltage changes less than
50mV when the load current increases from OmA to IOmA in 100ps. The proposed LDO
regulator can also drive a wide range of capacitance load from 470pF to lOnF.
The simulation results have shown that the proposed LDO regulator have achieved
the best figure-of-merit (FOM) value with respect to the published works. Besides, the
LDO regulator has small settling time. It is also not sensitive to the process variation as
well as load capacitance. As a result, the LDO regulator is useful for digital system for
fully on-chip solution. |
|---|