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In this paper, we present a low dropout voltage regulator (LDO) which can be programmed to generate four output voltages (3.3 V, 2.5 V, 1.8 V, and 0 V) by the external control signals. Between the error amplifier and the power transistor, we place a simple buffer so that the power supply rejection (PSR) of LDO can be improved. The design specification of the maximum load current is 100 mA. The proposed...
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