Low input voltage and high step-up integrated regulator for thermoelectric energy harvesting

Pathirana, W. P. M. R.
Jayaweera, H. M. P. C.
Muhtaroglu, Ali
This paper presents a low input voltage and high step-up fully integrated DC-DC regulator in 0.18 mu m standard CMOS technology for thermoelectric micro-power generation. The circuit avoids off-chip components, non-standard processes, and is thus suitable for ultra-low voltage low profile system-on-chip applications. The proposed system can deliver a regulated output voltage of 1.5 V at 31 mu W output power with an input voltage as low as 0.2 V. The maximum simulated efficiency is 22% at the given step-up range. The design methodology of an integrated inductor layout and oscillator has been reported in detail for the standard process. At the ultra-low voltage range of interest, the regulator is estimated to have lower cost, higher integration, and improved efficiency compared to the alternatives reported in literature, including the 90 nm and 0.18 mu m two-stage charge pump designs previously reported by our team.


Low voltage integrated charge pump circuits for energy harvesting applications
Pathirana, Walive Pathiranage Manula Randhika; Muhtaroğlu, Ali; Sustainable Environment and Energy Systems (2014-7)
Two different low voltage integrated charge pump circuit topologies are studied in this thesis for energy harvesting applications. The circuits are implemented in 0.18 μm standard CMOS technology without the use of off-chip magnetic components and non-standard processes, and are thus suitable for low profile (small and low cost) system-on-chip applications. In the first proposed design, operation at low input voltage (~240 mV) is achieved with a 5-stage subthreshold first stage oscillator, which improves th...
Low voltage DC-DC conversion without magnetic components for energy harvesting
Pathirana, W. P. M. R.; Muhtaroglu, Ali (2012-12-05)
A novel interface circuit topology with power management is presented for ultra-low voltage DC-DC step-up conversion. The proposed 90 nm CMOS circuit avoids off-chip components or non-standards processes, and is suitable for ultra-low voltage system-on-chip applications. Comparative analysis was performed with a commercial low voltage DC-DC converter to identify the relative advantages and disadvantages of the integrated approach. The circuit can be started up from input voltage as low as 0.2V based on the ...
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Ulusan, Hasan; Zorlu, Ozge; Külah, Haluk; Muhtaroglu, Ali (2015-03-26)
This paper presents a performance enhancement feature for a novel power management circuit to generate 1.8 V from the low DC voltage rectified at the output of the vibration-based electromagnetic (EM) energy harvesters. The proposed 180 nm circuit utilizes a low voltage charge pump based boost converter with variable output-stages, and an autonomous regulator circuit with negative feedback topology. 2 and 3 stage charge pump options in the variable stage configuration has been validated to extend the suppor...
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This paper provides an overview of the studies and the current status for the development of a novel, low-cost, and CMOS foundry compatible approach for implementing microbolometers with standard CMOS and simple post-CMOS subtractive MEMS processes. This CMOS infrared detector technology is shortly called as the CMOS IR (CIR) technology, and it can be used to implement Focal Plane Arrays (FPAs) for infrared imaging in the LWIR-band (8-12 mu m wavelength). Post-CMOS processes require only one mask lithograph...
Citation Formats
W. P. M. R. Pathirana, H. M. P. C. Jayaweera, and A. Muhtaroglu, “Low input voltage and high step-up integrated regulator for thermoelectric energy harvesting,” 2015, p. 0, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/66755.