Capacitor-less LVR for a 32-bit automotive microcontroller SoC in 65nm CMOS

Jackum, Thomas; Pribyl, Wolfgang; Praemassing, Frank; Maderbacher, Gerhard; Riederer, Roman

doi:10.1109/esscirc.2012.6341321

Cited by 13 publications

(3 citation statements)

References 6 publications

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“…It ensures the output pole at high frequency in a wide range of load change, thus maintains a good loop stability even in light current load. [6] 2012 [7] 2014 [8] 2018 [9] 2016 [10] 2019 [11] Max In [6], the figure-of-merit (FOM) is presented to compare transient response performance:…”

Section: Nmos Regulation Fetmentioning

confidence: 99%

A Fast Transient Response and High PSR Low Drop-Out Voltage Regulator

Fan

Feng

et al. 2020

2020 27th IEEE International Conference on Electronics, Circuits and Systems (ICECS)

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In this paper, a low drop-out (LDO) linear regulator with high power supply rejection ratio(PSR) and fast transient response is proposed for various applications. To achieve fast transient response, this work employs variable bias and transientboost capacitance. The variable bias structure enhance the slew rate and PSR of LDO. The transient-boost capacitance (TBC) is set in a proper location, using its voltage characteristic to enhance transient response without consuming quiescent current, and it also improves circuit's stability. This circuit is designed based on TSMC 65nm CMOS Technology and verified by Cadence simulation environment. According to the simulation results, the LDO achieves a PSR of 68.3dB and 51.4dB at 10kHz and 1MHz. Undershoot and overshoot of Vout are 190mV and 143mV under a varying load current from 20mA to 80mA with edge time of 1ns.

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Section: Nmos Regulation Fetmentioning

confidence: 99%

A Fast Transient Response and High PSR Low Drop-Out Voltage Regulator

Fan

Feng

et al. 2020

2020 27th IEEE International Conference on Electronics, Circuits and Systems (ICECS)

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“…Such poorly to rapidly changing output load curr bandwidth and dominant pole at other than limitation is overcome by employing trans circuits. Very fast capacitor-less LVR have b such techniques [1]- [5]. But there is usually maximum output capacitance to ensure LV makes it difficult to further improve the tran by putting more output capacitance.…”

Section: Introductionmentioning

confidence: 99%

Any Capacitor Stable LVR Using Sub-unity Gain Positive Feedback Loop in 65nm CMOS

Singh

Bansal

2015

2015 28th International Conference on VLSI Design

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In this paper a fully on-chip, an linear voltage regulator (LVR) using sub-u feedback loop and NMOS pass element is pr gain of the loop decouples loop stability from value thus realizing any capacitor stable regu shown to be stable for wide range of output from 1nF to 40μF. Regulator output settles in peak voltage variation of 158mV for a load c 115mA in 0.14μs with 1nF output capacitance. better for higher values of output capacitanc 1.25V output from 1.6V input while using a supply and occupies 0.18mm 2 in 65nm CMOS. Keywords-capacitor-less; linear voltage pass element; positive feedback loopI.

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“…Prior works in fast-settling sub-1-V OCL-LDOs [80][81][82][83] display a VDO of 200 mV, which still leave room for improvement. An LDO reported in [84] features a VDO as low as 50 mV but can source only 10-mA load current, maximum.…”

Section: Chapter 4 a Fast-settling Ocl-ldo Based On Load-adaptive Negative-resistancementioning

confidence: 99%

Design of a power management unit for a wireless-power-transfer-enabled wireless sensor node

Luo¹

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Wireless Sensor Network (WSN) is one of the supporting technologies for the Internet of Things (IoT). However, a large-scale deployment of the WSN faces multifarious challenges. WSN node size and maintenance cost incurred by periodic energy source replacement are among them. From the perspectives of energy sources, these two challenges can be better addressed by Wireless Power Transfer (WPT) technologies in comparison with energy-scavengers or traditional energy-storages. Omnidirectional-Electro-Magnetic (EM)-Radiation WPT-technology appears to be a viable choice. Hence, this work proposes various circuit design techniques in developing the dedicated Power Management Integrated Circuit (PMIC) structures to facilitate implementation of such WPT technology. In detail, this thesis describes (i) a sub-1-V CMOS Voltage Reference (VR) with novel trimming networks, (ii) a Capacitor-Less (OCL) Low Drop-Out Voltage Regulator (LDO) with load-adaptive negative-resistance at the input stage of an Operational Transconductance Amplifier (OTA), and (iii) a compensator-less Square Root Voltage Mode (SRVM) controller for a Pulse Width Modulation (PWM) Discontinuous Current Mode (DCM) Boost DC-DC Converter. To elaborate, the trimming networks aim at minimizing Temperature Coefficient (TC) against process variations and the finite resistance of the CMOS trimming switches in a CMOS Voltage Reference (VR). The loadadaptive negative-resistance helps to boost the DC-gain of the proposed OCL-LDO while improving the current efficiency and ensuring fast-settling and frequency stability. Lastly, the compensator-less SRVM controller is designed to minimize power and area from the discrete compensator circuits in conventional DC-DC converters. Subsequently, structures of three key PMIC building blocks, such as a VR, an OCL-LDO and a boost DC-DC switching converter, are proposed with the aforementioned circuit design techniques. Trimming networks are proposed for a sub-1-volt CMOS VR implemented using the threshold-voltage-difference (ΔVth) approach. Fabricated in 0.18-μm CMOS-technology, the trimmed CMOS VR consumes 0.4 μA with a supply voltage of 0.7 V. A TC of 45 ppm/°C and a

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Capacitor-less LVR for a 32-bit automotive microcontroller SoC in 65nm CMOS

Cited by 13 publications

References 6 publications

A Fast Transient Response and High PSR Low Drop-Out Voltage Regulator

A Fast Transient Response and High PSR Low Drop-Out Voltage Regulator

Any Capacitor Stable LVR Using Sub-unity Gain Positive Feedback Loop in 65nm CMOS

Design of a power management unit for a wireless-power-transfer-enabled wireless sensor node

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