Print Email Facebook Twitter A Low-Power Microcontroller in a 40-nm CMOS Using Charge Recycling Title A Low-Power Microcontroller in a 40-nm CMOS Using Charge Recycling Author Blutman, Kristof (NXP Semiconductors) Kapoor, Ajay (NXP Semiconductors) Majumdar, Arjun (NXP Semiconductors) Martinez, Jacinto Garcia (NXP Semiconductors) Echeverri, Juan (NXP Semiconductors) Sevat, Leo (NXP Semiconductors) van der Wel, Arnoud P. (NXP Semiconductors) Fatemi, Hamed (NXP Semiconductors) Makinwa, K.A.A. (TU Delft Microelectronics) Department Microelectronics Date 2017 Abstract A 40-nm microcontroller featuring voltage stacked memory and logic is presented. This involved connecting the power domains of the memory and logic in series, such that the ground of one power domain is connected to the positive supply rail of the other. In this paper, an ARM Cortex-M0+ and its peripherals are powered from 0 V to VDD, while its 4-kB ROM and the 16-kB SRAM are powered from VDD to 2 VDD. Since the memory and logic will, in general, draw different supply currents, the midrail VDD is provided by an on-chip switched capacitor voltage regulator (SCVR). To allow a direct comparison of voltage stacking with a conventional single supply, it can be turned off by configuring the SCVR to power both the memory and logic from 0 V and VDD. Turning on voltage stacking results in 96% power conversion efficiency, while the active converter area is reduced by 2.6 ×. Despite the use of a smaller SCVR, the voltage stacking reduces the supply noise by 3.4 dB and the output voltage drops from 58 to 36 mV. Subject Balanced voltage islandscharge recyclinglevel shiftermicrocontrollerspower managementswitched capacitor regulatorsvoltage stacking To reference this document use: http://resolver.tudelft.nl/uuid:fed48d00-c25a-438b-b5ba-21076a6d6252 DOI https://doi.org/10.1109/JSSC.2016.2637003 ISSN 0018-9200 Source IEEE Journal of Solid State Circuits, 52 (4), 950-960 Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type journal article Rights © 2017 Kristof Blutman, Ajay Kapoor, Arjun Majumdar, Jacinto Garcia Martinez, Juan Echeverri, Leo Sevat, Arnoud P. van der Wel, Hamed Fatemi, K.A.A. Makinwa Files PDF 30247109_JSSC2637003.pdf 1.41 MB Close viewer /islandora/object/uuid:fed48d00-c25a-438b-b5ba-21076a6d6252/datastream/OBJ/view