Abstract

A 65nm CMOS Low Drop-Out (LDO) Regulator is presented employing Gain Boost-Up and Differential Feed Forward Noise Cancellation (DFFNC) to maximize the Power Supply Rejection. The gain boost-up consists of both negative feedback and positive feedback in the error amplifier. With a 1.2V supply voltage, this LDO regulator has a 200mV drop-out voltage and the ability to handle a maximum 25mA load current. The measurement results show a −47dB PSR ratio up to 10MHz and 0.8% of load regulation for the full load current change.

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