A DC-DC converter for internet-of-things power management IC
The Internet of Things (IoT) is set to explode in the foreseeable future with devices with integrated sensing, computation and communication capabilities that are operated in a low- power mode for most of their operation to extend the limited battery life. This creates challenges for power man...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
2017
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/70849 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | The Internet of Things (IoT) is set to explode in the foreseeable future with devices with
integrated sensing, computation and communication capabilities that are operated in a low-
power mode for most of their operation to extend the limited battery life. This creates
challenges for power management circuits which will supply the micro-ampere sleep mode
currents. They are high conversion efficiency at these sleep mode currents and low
quiescent current operation of the converter. The implementation should also use less
silicon area for implementation in small IoT devices.
This project would explore and study techniques used by existing DC-DC converters to
improve their efficiency in the sleep mode also known as light load conditions, methods to
reduce quiescent current during operation and how to maintain high efficiency across the
wide load ranges expected in IoT devices. A review of the principles behind the design of
buck converters is also included.
These methods were implemented successfully into a buck converter which achieved
high conversion efficiency of 80% at a load current of 50 µA with the quiescent current
measured to be 7 µA converting 2.4 V to 1.8 V with a maximum peak voltage ripple of
27.7 mV which is about 1.5% of 1.8V in the simulator results. |
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