Abstract
Switched-mode-control (SMC) is a control methodology that allows instantaneous switching between controllers to extend the dynamic range of feedback circuits. A hybrid low dropout voltage regulator utilizing SMC is designed in 130 nm CMOS for fine-grain power management, fast droop recovery, and accurate voltage regulation of digital load circuits. The design provides an optimal tradeoff between performance and accuracy by switching between a digital and an analog control loop. Measurements from the test-chip show near-threshold-voltage operation, peak transient response of 0.71 ns/mA, and a peak current efficiency of 98.64%.
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