TY - JOUR
T1 - Fully-integrated LDO voltage regulator for digital circuits
AU - Lüders, M.
AU - Eversmann, B.
AU - Schmitt-Landsiedel, D.
AU - Brederlow, R.
PY - 2011
Y1 - 2011
N2 - Low-dropout (LDO) voltage regulators are widely used to supply low-voltage digital circuits. For recent ultra-low-power microcontroller systems, a fully-integrated LDO without any external capacitance is preferred in order to achieve a fast and energy-efficient wake-up. Commonly, an LDO is specified, designed and verified for DC load currents. In contrast, a digital load creates large current spikes. As an LDO designed for low quiescent current is too slow to react on fast current spikes, a minimum on-chip capacitance is required to keep the supply voltage within a certain error window. Different fully-integrated LDO topologies are investigated regarding their suitability to supply low-voltage digital circuits. The any-load stable LDO topology is selected and implemented on a 0.13 μm test-chip. The LDO is able to provide a maximum load current of 2.5 mA while consuming a quiescent current of 17 μA.
AB - Low-dropout (LDO) voltage regulators are widely used to supply low-voltage digital circuits. For recent ultra-low-power microcontroller systems, a fully-integrated LDO without any external capacitance is preferred in order to achieve a fast and energy-efficient wake-up. Commonly, an LDO is specified, designed and verified for DC load currents. In contrast, a digital load creates large current spikes. As an LDO designed for low quiescent current is too slow to react on fast current spikes, a minimum on-chip capacitance is required to keep the supply voltage within a certain error window. Different fully-integrated LDO topologies are investigated regarding their suitability to supply low-voltage digital circuits. The any-load stable LDO topology is selected and implemented on a 0.13 μm test-chip. The LDO is able to provide a maximum load current of 2.5 mA while consuming a quiescent current of 17 μA.
UR - http://www.scopus.com/inward/record.url?scp=79961062096&partnerID=8YFLogxK
U2 - 10.5194/ars-9-263-2011
DO - 10.5194/ars-9-263-2011
M3 - Article
AN - SCOPUS:79961062096
SN - 1684-9965
VL - 9
SP - 263
EP - 267
JO - Advances in Radio Science
JF - Advances in Radio Science
ER -