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Proceedings Paper

Universal and inductorless DC/DC converter for multi-output power supplies in sensor and actuator networks
Author(s): Sergio Saponara; Gabriele Ciarpi
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Paper Abstract

This work proposes a universal and inductorless DC/DC converter that can be used for a wide input range, from few V to 60 V, to regulate output voltages from 5 V down to 1 V in Sensor and Actuator Network nodes. The proposed converter has been developed within the Athenis3D European project. It is composed by a cascade of multiple switching capacitor stages, with a proper skip-mode control to implement both step-down and step-up converting ratios, thus regulating all input sources to a voltage of about 6 V. These switching stages are further cascaded with linear regulators, which can provide stable output voltages down to 1 V. The multi-output regulator has been realized as a single-chip in a low-cost 0.35 μm CMOS technology. It is available as a naked die or in a ceramic package. The only needed external components are surface mount capacitors, which can be integrated on top of the naked chip die, creating a 3D structure, using trench capacitors embedded in a passive interposing layer. This way the size of the power management unit is further minimized. An advantage of the proposed converter is that it isn’t optimized for a particular input voltage, therefore it can be used with no constant input power, like power harvesting systems (e.g. solar cells, wind and water turbines) and very disturbed power supplies.

Paper Details

Date Published: 31 May 2017
PDF: 6 pages
Proc. SPIE 10246, Smart Sensors, Actuators, and MEMS VIII, 1024612 (31 May 2017); doi: 10.1117/12.2265188
Show Author Affiliations
Sergio Saponara, Univ. di Pisa (Italy)
Gabriele Ciarpi, Univ. di Pisa (Italy)

Published in SPIE Proceedings Vol. 10246:
Smart Sensors, Actuators, and MEMS VIII
Luis Fonseca; Mika Prunnila; Erwin Peiner, Editor(s)

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