TY - JOUR
T1 - Architectural and circuit design techniques for power management of ultra-low-power MCU systems
AU - Lueders, Michael
AU - Eversmann, Bjoern
AU - Gerber, Johannes
AU - Huber, Korbinian
AU - Kuhn, Ruediger
AU - Zwerg, Michael
AU - Schmitt-Landsiedel, Doris
AU - Brederlow, Ralf
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/11/1
Y1 - 2014/11/1
N2 - A holistic power saving concept for ultra-low-power microcontroller (MCU) systems involving application requirements, system architecture, and circuit design techniques is presented. The key of this concept is a digitally enhanced low dropout regulator (LDO) supplying the MCU digital core. By making use of known system power information, the LDO digitally adapts its maximum current drive capability up to 2.56 mA while its quiescent current is as low as 650 nA in light load conditions. In this way, the power management overhead is drastically reduced when operating at low clock speeds enabling system energy savings of 31% at 1 MHz. At the same time, a drastic reduction of the LDO output capacitance enables ultra-low-power consumption during sleep and energy efficient wake-up, resulting in system energy savings up to a factor of 4.6.
AB - A holistic power saving concept for ultra-low-power microcontroller (MCU) systems involving application requirements, system architecture, and circuit design techniques is presented. The key of this concept is a digitally enhanced low dropout regulator (LDO) supplying the MCU digital core. By making use of known system power information, the LDO digitally adapts its maximum current drive capability up to 2.56 mA while its quiescent current is as low as 650 nA in light load conditions. In this way, the power management overhead is drastically reduced when operating at low clock speeds enabling system energy savings of 31% at 1 MHz. At the same time, a drastic reduction of the LDO output capacitance enables ultra-low-power consumption during sleep and energy efficient wake-up, resulting in system energy savings up to a factor of 4.6.
KW - Digitally enhanced analog
KW - energy harvesting
KW - fully integrated voltage regulator
KW - power management unit
KW - ultra-low-power microcontroller.
UR - http://www.scopus.com/inward/record.url?scp=84908458568&partnerID=8YFLogxK
U2 - 10.1109/TVLSI.2013.2290083
DO - 10.1109/TVLSI.2013.2290083
M3 - Article
AN - SCOPUS:84908458568
SN - 1063-8210
VL - 22
SP - 2287
EP - 2296
JO - IEEE Transactions on Very Large Scale Integration (VLSI) Systems
JF - IEEE Transactions on Very Large Scale Integration (VLSI) Systems
IS - 11
M1 - 6680706
ER -