Abstract
An output capacitor-less low-dropout (OCL-LDO) regulator with a wide range of load currents is proposed in this study. The structure of the proposed regulator is based on the flipped-voltage-follower LDO regulator. The feedback loop of the proposed regulator consists of two stages. The second stage is turned on or off depending on the variation in the output load current. Hence, the regulator can retain a phase margin at a wide range of load currents. The proposed regulator exhibits a better regulation performance compared to the ones in previous studies. The test chip is fabricated using a 65-nm CMOS process.
Highlights
Power management of mobile devices and communication networks have been advancing with the growing number of mobile consumer electronics and Internet of Things (IoT) devices
As power management integrated circuits (PMICs) contain a large number of LDO regulators, the loss of PCB area due to multiple off-chip capacitors cannot be ignored, in mobile applications that require a small form factor
This study presents an Flipped voltage follower (FVF)-based LDO regulator, which is regulator, which is stable even under a light load condition (0–1 mA)
Summary
Power management of mobile devices and communication networks have been advancing with the growing number of mobile consumer electronics and Internet of Things (IoT) devices. As PMICs contain a large number of LDO regulators, the loss of PCB area due to multiple off-chip capacitors cannot be ignored, in mobile applications that require a small form factor. To overcome this problem, output capacitor-less LDO (OCL-LDO) regulators have been studied. This study presents an FVF-based LDO efficiency under a light load condition. This study presents an FVF-based LDO regulator, which is regulator, which is stable even under a light load condition (0–1 mA).
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