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A digitally controlled LDO in 14nm tri-gate CMOS powering an Atom™ core with embedded power gates enables per-core DVFS over a wide voltage-frequency range. The LDO demonstrates 99.6% peak current efficiency at 2.5A load current and provides a power density of 26.1 W/mm2. The multi-mode digital controller featuring non-linear mode and adaptive gain achieves <20ns settling time with a 100mV droop...
In this paper, we propose a digitally controlled voltage regulator with fast-transient-response using an oscillator based ADC implemented in 14nm CMOS technology. The transient response is critical to mitigate droop for large di/dt seen in cores and wide dropout range helps enable DVFS to improve power/performance ratio. In this work, we target 1-1.15V input voltage with output voltage range of 0...
In Digital Linear Dropout (Digital LDO) implementation for System-On-Chips (SOC), the power gates operate in triode region and are distributed in bank structure. With wide dropout, the current distribution in the power gate bank turns out to be the key challenge. The proposed work presents a methodology/algorithm to distribute the current flowing through the bank of a digital LDO uniformly in a 14nm...
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