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Digital Control of a DC/DC Buck Converter

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Schematic view of a synchronous buck converter (Priewasser, R., Agostinelli, M., Unterrieder, C., Marsili, S., & Huemer, M. (2013). Modeling, control, and implementation of DC–DC converters for variable frequency operation. IEEE transactions on power electronics, 29(1), 287-301.)

Short Description

Power management is a fundamental block in integrated circuits, especially for battery-operated systems such as the Magnetic Resonance Imaging transceiver which requires this DC-DC converter. A buck converter (also called step-down converter) is a DC-DC power converter which takes an input voltage and reduce it to a lower one. Before an LDO can produce a stable 1.2V supply, a DC/DC needs to efficiently reduce the voltage from 3.7V (nominal battery voltage) to 1.5V (input of the LDO). The analog part of this DC/DC has already been designed in TSMC 65nm CMOS.

As a first step, the proper operation of the DC/DC will be simulated. Then, the digital controller required will be implemented and mixed signal simulations will be performed. If time allows, the synthesis of this block will be carried out to prepare its integration in a future tape-out.

At the Integrated Systems Laboratory, we have designed similar circuits in an older technology. This circuit will have to be designed in TSMC 65nm CMOS and can be reused in the future for other projects.

Status: Available

Type: Bachelor's Thesis or Semester Project
Contact: Guillaume Mocquard, Thomas Burger
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Analog Integrated Circuits (AIC)


20% Theory
20% Analog simulation
60% Digital Design


Mathieu Luisier

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